UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

(Mark One)

(517) 279-5500
(Registrant's Telephone Number, Including Area Code)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes       X      No       

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes ___   No ___

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act (Check one):

Large accelerated filer             Accelerated filer             Non-accelerated filer          Smaller reporting company   X  

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).           Yes             No    X   

The number of shares outstanding of the registrant's Common Stock, $2.50 par value, as of November 13, 2009, was 2,323,410 shares.

Forward-Looking Statements

          This report contains forward-looking statements that are based on management's beliefs, assumptions, current expectations, estimates and projections about the financial services industry, the economy, and Southern Michigan Bancorp, Inc. Forward-looking statements are identifiable by words or phrases such as "outlook", or "strategy"; that an event or trend "may", "should", "will", "is likely", or is "probable" to occur or "continue" or "is scheduled" or "on track" or that Southern Michigan Bancorp, Inc. or its management "anticipates", "believes", "estimates", "plans", "forecasts", "intends", "predicts", "projects", or "expects" a particular result, or is "confident," "optimistic" or has an "opinion" that an event will occur, or other words or phrases such as "ongoing", "future", or "judgment", "considered" and variations of such words and similar expressions. Management's determination of the provision and allowance for loan losses and other accounting estimates, such as the carrying value of goodwill and mortgage servicing rights and the fair value of investment securities (including whether any impairment on any investment security is temporary or other-than-temporary), involve judgments that are inherently forward-looking. There can be no assurance that future loan losses will be limited to the amounts estimated. Our ability to successfully implement new programs and initiatives, increase efficiencies and improve profitability is not entirely within our control and is not assured. The future effect of changes in the real estate markets and the Michigan and national economy on the banking industry, generally, and Southern Michigan Bancorp, Inc., specifically, are also inherently uncertain. These statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions ("risk factors") that are difficult to predict with regard to timing, extent, likelihood and degree of occurrence. Therefore, actual results and outcomes may materially differ from what may be expressed or forecasted in such forward-looking statements. Southern Michigan Bancorp, Inc. undertakes no obligation to update, amend or clarify forward-looking statements, whether as a result of new information, future events or otherwise.

          Risk factors include, but are not limited to, the risk factors described in "Item 1A - Risk Factors" of Southern Michigan Bancorp, Inc.'s Annual Report on Form 10-K for the year ended December 31, 2008; the timing and level of asset growth; changes in market interest rates; changes in banking laws and regulations; changes in tax laws; changes in prices, levies and assessments; the impact of technological advances and issues; governmental and regulatory policy changes; opportunities for acquisitions and the effective completion of acquisitions and integration of acquired entities; the possibility that anticipated cost savings and revenue enhancements from acquisitions, restructurings, reorganizations and bank consolidations may not be realized at amounts projected, at all or within expected time frames; the local and global effects of current and future military actions; and current uncertainties and fluctuations in the financial and credit markets and stocks of financial services providers due to concerns about credit availability and concerns about the Michigan economy in particular. These and other factors are representative of the risk factors that may emerge and could cause a difference between an ultimate actual outcome and a preceding forward-looking statement.

Part I.  Financial Information

See accompanying notes to interim consolidated financial statements.

See accompanying notes to interim consolidated financial statements.

See accompanying notes to interim consolidated financial statements.

See accompanying notes to interim consolidated financial statements.

SOUTHERN MICHIGAN BANCORP, INC.
NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation: The consolidated financial statements include the accounts of Southern Michigan Bancorp, Inc. (the Company) and its wholly-owned subsidiary, Southern Michigan Bank & Trust (SMB&T), after elimination of significant inter-company balances and transactions. FNB Financial was a wholly-owned subsidiary of the Company until its consolidation with SMB&T in April 2009. SMB&T owns SMB Mortgage Company, which transacts all residential real estate loans and it is consolidated into SMB&T's financial statements. SMB&T also owns FNB Financial Services, which conducts a brokerage business and is also consolidated into SMB&T's financial statements. During 2004, the Company formed a special purpose trust, Southern Michigan Bancorp Capital Trust I, for the sole purpose of issuing trust preferred securities. Under U.S. generally accepted accounting principles, the trust is not consolidated into the financial statements of the Company.

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions for Form 10-Q and Rule 8-03 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all adjustments believed necessary in order to make the financial statements not misleading have been included. Operating results for the nine months ended September 30, 2009 are not necessarily indicative of the results that may be expected for the year ending December 31, 2009.

The accompanying consolidated financial statements should be read in conjunction with the consolidated financial statements and footnotes of the Company for December 31, 2008 included in the Company's Annual Report on Form 10-K for the year ended December 31, 2008, filed with the Securities and Exchange Commission on March 30, 2009.

Reclassifications
Some items in the prior period consolidated financial statements have been reclassified to conform to the current year presentation.

NOTE B - NEW ACCOUNTING PRONOUNCEMENTS

Adoption of New Accounting Standards:
In June 2009, the FASB issued Accounting Standards Update (ASU) No. 2009-01 (formerly FAS No. 168), The FASB Accounting Standards Codification and the Hierarchy of Generally Accepted Accounting Principles. The Accounting Standards Codification (ASC) is the single source of authoritative non governmental U.S. generally accepted accounting principles (GAAP). Rules and interpretive releases of the Securities and Exchange Commission (SEC) under authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. The Codification does not change current GAAP, but is intended to simplify user access to all authoritative GAAP by providing all the authoritative literature related to a particular topic in one place. All existing accounting standard documents are superseded and all other accounting literature not included in the Codification is considered nonauthoritative. The Codification is effective for financial statements issued for interim and annual periods ending after September 15, 2009. The adoption of this ASU did not have a material impact on the results of operations or financial position of the Company as it only required changes to GAAP references in our financial statements.

ASC 320-10 (formerly Staff Position (FSP) No. 115-2 and No. 124-2, Recognition and Presentation of Other-Than-Temporary Impairments), amends existing guidance for determining whether impairment is other-than-temporary (OTTI) for debt securities. The ASC requires an entity to assess whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of these criteria is met, the entire difference between amortized cost and fair value is recognized in earnings. For securities that do not meet the aforementioned criteria, the amount of impairment recognized in earnings is limited to the amount related to credit losses, while impairment related to other factors is recognized in other comprehensive income. Additionally, the ASC expands and increases the frequency of existing disclosures about other-than-temporary impairments for debt and equity securities. ASC 320-10 was effective for interim and annual reporting periods ending after June 15, 2009, with early adoption permitted for periods ending after March 15, 2009.

The adoption of the ASC on April 1, 2009 did not have a material impact on the results of operations or financial position of the Company because the Company did not hold any other-than-temporary impaired debt securities.

ASC 820-10 (formerly FSP No. 157-4, Determining Fair Value When the Volume and Level of Activity for the Asset or Liability Have Significantly Decreased and Identifying Transactions That Are Not Orderly), emphasizes that even if there has been a significant decrease in the volume and level of activity, the objective of a fair value measurement remains the same. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants. ASC 820-10 provides a number of factors to consider when evaluating whether there has been a significant decrease in the volume and level of activity for an asset or liability in relation to normal market activity. In addition, when transactions or quoted prices are not considered orderly, adjustments to those prices based on the weight of available information may be needed to determine the appropriate fair value. The ASC also requires increased disclosures. ASC 820-10 was effective for interim and annual reporting periods ending after June 15, 2009, and was applied prospectively. The adoption of ASC 820-10 as of April 1, 2009 did not have a material impact on the results of operations or financial position of the Company.

ASC 825-10 (formerly FSP No. 107-1 and APB 28-1, Interim Disclosures about Fair Value of Financial Instruments), requires disclosures about fair value of financial instruments for interim reporting periods of publicly traded companies that were previously only required in annual financial statements. ASC 825-10 is effective for interim reporting periods ending after June 15, 2009. The adoption of ASC 825-10 as of April 1, 2009 did not have a material impact on the results of operations or financial position of the Company as it only required disclosures which are included in Note F.

ASC 855-10 (formerly FAS No. 165, Subsequent Events), establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued or are available to be issued. In particular, ASC 855-10 sets forth the period after the balance sheet date during which management of a reporting entity should evaluate events or transactions that may occur for potential recognition or disclosure in the financial statements, the circumstances under which an entity should recognize events or transactions occurring after the balance sheet date in its financial statements, and the disclosures that an entity should make about events or transactions that occurred after the balance sheet date. An entity must apply the requirements to interim or annual financial periods ending after June 15, 2009. The adoption of ASC 855-10 did not significantly change the financial statements. See Note H for additional comments.

Effect of Newly Issued But Not Yet Effective Accounting Standards:

FAS No. 166, "Accounting for Transfers of Financial Assets-an amendment of FASB Statement No. 140," removes the concept of a qualifying special-purpose entity from Statement 140 and removes the exception from applying FASB Interpretation No. 46 (revised December 2003), Consolidation of Variable Interest Entities, to qualifying special-purpose entities. The objective in issuing this Statement is to improve the relevance, representational faithfulness, and comparability of the information that a reporting entity provides in its financial statements about a transfer of financial assets; the effects of a transfer on its financial position, financial performance, and cash flows; and a transferor's continuing involvement, if any, in transferred financial assets. This Statement must be applied as of the beginning of each reporting entity's first annual reporting period that begins after November 15, 2009, for interim periods within that first annual reporting period and for interim and annual reporting periods thereafter. The impact of adoption is not expected to be material.

FAS No. 167, "Amendments to FASB Interpretation No. 46(R)," seeks to improve financial reporting by enterprises involved with variable interest entities. The statement addresses (1) the effects on certain provisions of FASB Interpretation No. 46 (revised December 2003), Consolidation of Variable Interest Entities, as a result of the elimination of the qualifying special-purpose entity concept in FASB Statement No. 166, Accounting for Transfers of Financial Assets, and (2) constituent concerns about the application of certain key provisions of Interpretation 46(R), including those in which the accounting and disclosures under the Interpretation do not always provide timely and useful information about an enterprise's involvement in a variable interest entity. This Statement is effective as of the beginning of each reporting entity's first annual reporting period that begins after November 15, 2009, for interim periods within that first annual reporting period, and for interim and annual reporting periods thereafter. The impact of adoption is not expected to be material.

In August 2009, the FASB issued ASU No. 2009-05, Fair Value Measurements and Disclosures (Topic 820) - Measuring Liabilities at Fair Value. This ASU provides amendments for fair value measurements of liabilities. It provides clarification that in circumstances in which a quoted price in an active market for the identical liability is not available, a reporting entity is required to measure fair value using one or more techniques. ASU 2009-05 also clarifies that when estimating a fair value of a liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the existence of a restriction that prevents the transfer of the liability. ASU 2009-05 is effective for the first reporting period (including interim periods) beginning after issuance or fourth quarter 2009. The Company is assessing the impact of ASU 2009-05 on its financial condition, results of operations and disclosures.

NOTE C - EARNINGS PER SHARE

Basic earnings per common share is net income divided by the weighted average number of common shares outstanding during the period. ESOP shares are considered outstanding for this calculation unless unearned. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under stock options. Earnings and dividends per common share are restated for all stock splits and dividends through the date of issue of the financial statements.

A reconciliation of the numerators and denominators of basic and diluted earnings per share for the three and nine month periods ended September 30, 2009 and 2008 is as follows (dollars in thousands, except per share data):

Stock option awards outstanding that were anti-dilutive, and therefore not included in the computation of earnings per share, were as follows: 211,730 and 215,818 for the three months ended September 30, 2009 and 2008, respectively, and 229,782 and 193,675 for the nine months ended September 30, 2009 and 2008, respectively.

NOTE D - SECURITIES

Investment securities were as follows (in thousands):

Included above for December 31, 2008 are $1,900,000 of floating rate securities that are putable on a weekly basis.

Securities with unrealized losses at September 30, 2009 and December 31, 2008 that have not been recognized in income are as follows (in thousands):

The Company has performed an evaluation of its investments for other than temporary impairment. No impairment was identified. Unrealized losses within the investment portfolio are determined to be temporary as the issuers are believed to be of high credit quality, management does not intend to sell the securities and the decline in fair value is largely due to changes in market interest rates. The fair value is expected to recover as the securities approach their maturity date.

Gains on sales and calls of securities were $407,000 and $15,000 for the nine months ended September 30, 2009 and 2008, respectively.

Contractual maturities of debt securities at September 30, 2009 are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

NOTE E - STOCK OPTIONS

Shareholders of the Company approved a stock option plan in April 2000 and a stock incentive plan in June 2005. The plans were authorized to issue up to 115,500 and 157,500 shares, respectively. In May 2008, shareholders of the Company ratified amendments to the Stock Incentive Plan of 2005, which, among other things, increased the authorized shares from 157,500 to 300,000. As of September 30, 2009, there were 46,218 shares available for future issuance under the 2000 plan and 116,658 shares available for future issuance under the 2005 plan.

A summary of stock option activity is as follows for the nine months ended September 30, 2009:

The fair value of each option award is estimated on the date of grant using a Black-Scholes option valuation model that uses the weighted average assumptions noted in the following table. The expected volatility and life assumptions are based on historical experience. The interest rate is based on the U.S. Treasury yield curve and the dividend assumption is based on the Company's history and expected dividend payouts.

The Company has recorded $64,000 and $84,000 in compensation expense related to the stock options for the nine month periods ended September 30, 2009 and 2008, respectively.

In January 2007, 2,740 shares of restricted stock were issued to employees and directors. In June 2008, 5,535 shares of restricted stock were issued to employees and directors. In January 2009, 12,230 shares of restricted stock were issued to employees and directors. All shares of restricted stock issued and outstanding vest 20% per year over five years. Compensation expense related to the issuance of shares of restricted stock of $35,000 and $17,000 was recorded during the nine months ended September 30, 2009 and 2008, respectively.

NOTE F - FAIR VALUE INFORMATION

The following methods and assumptions were used by the Company in estimating fair values for financial instruments:

While these estimates of fair value are based on management's judgment of appropriate factors, there is no assurance that if the Company had disposed of such items at September 30, 2009 or December 31, 2008, the estimated fair values would have been achieved. Market values may differ depending on various circumstances not taken into consideration in this methodology. The estimated fair values at September 30, 2009 and December 31, 2008, should not necessarily be considered to apply at subsequent dates.

In addition, other assets and liabilities that are not defined as financial instruments are not included in the following disclosures, such as property and equipment. Also, non-financial instruments typically not recognized in financial statements may have value but are not included in the following disclosures. These include, among other items, the estimated earnings power of core deposit accounts, trained work force, customer goodwill and similar items.

The estimated fair values of the Company's financial instruments are as follows (in thousands):