Exhibit 99.1

CSB BANCORP, INC. REPORTS FIRST QUARTER EARNINGS

First Quarter Highlights

Millersburg, Ohio – April 19, 2017 – CSB Bancorp, Inc. (OTC Pink: CSBB) today announced first quarter 2017 net income of $1,730,000, or $.63 per basic and diluted share, as compared to $1,480,000, or $.54 per basic and diluted share, for the same period in 2016.

Annualized returns on average common equity (“ROE”) and average assets (“ROA”) for the quarter were 10.54% and 1.05%, respectively, compared with 9.48% and 0.93% for the first quarter of 2016.

Eddie Steiner, President and CEO stated, “We are pleased to report strong first quarter earnings. Demand for business and consumer loans remains steady, resulting in higher loan balances and increased earnings.”

Revenue, on a fully-taxable equivalent basis, totaled $7.1 million during the quarter, an 11% increase from the prior-year first quarter. Net interest income increased $577 thousand, or 11%, in the first quarter of 2017 compared to the same period in 2016. Loan interest income including fees increased $707 thousand during first quarter 2017 as compared to the same quarter in 2016. This increase was driven partially by an increase in average loan volume of $53 million across all categories of loans as well as in increase of 14 basis points in loan yield. The net interest margin of 3.85% compared favorably to 3.57% for first quarter 2016.

Noninterest income increased by $114 thousand, or 11%, in the first quarter of 2017 compared to 2016. The increase reflects growth in cash surrender value of life insurance, increases in debit card fee income, growth in service charges on deposit accounts, and the gain on sale of mortgage loans. During 2016 a write-down of fixed assets of $39 thousand occurred during first quarter which did not recur in 2017. The increases were partially offset by a decrease in trust and brokerage fee income.

Noninterest expense amounted to $4.6 million during the quarter, an increase of $657 thousand, or 16%, from first quarter 2016. This increase is attributable to CSB providing a $540 thousand provision for unfunded loan commitments due to the impairment of a commercial line of credit. Salary and employee benefits rose $132 thousand, or 6%, on a quarter over prior year quarter with increases in salary, healthcare, and employment taxes. The Company’s first quarter efficiency ratio amounted to 65.4% as compared to 62.2% for the same quarter in the prior year.

Federal income tax provision totaled $752 thousand in first quarter 2017, compared to $644 thousand for the same quarter in 2016 reflecting a slightly decreased effective tax rate in 2017 from an increase in nontaxable income.

Average total assets during the quarter amounted to $667 million, an increase of $26 million, or 4%, above the same quarter of the prior year. Average loan balances of $481 million increased $53 million, or 12%, from the prior year first quarter while average securities balances of $133 million decreased $27 million, or 17%, as compared to first quarter 2016.

Average commercial loan balances for the quarter, including commercial real estate, increased $28 million, or 10%, from prior year levels. Average residential mortgage balances increased $16 million, or 19%, over the prior year’s quarter. Average home equity balances increased $4 million, or 9%, and average consumer credit balances increased $4 million, or 41%, versus the same quarter of the prior year.

Delinquent loan balances as of March 31, 2017 amounted to 1.25% of total loans as compared to 0.63% at March 31, 2016. Nonperforming assets totaled $4.9 million, or 1.02%, of total loans plus other real estate, an increase of $3 million over March 31, 2016. The allowance for loan losses amounted to 1.13% of total loans on March 31, 2017 as compared to 1.15% at March 31, 2016.

Net loan recoveries recognized during first quarter 2017 were $323 thousand, or 0.27% annualized, compared to first quarter 2016 net loan recoveries of $179 thousand.

Average deposit balances for first quarter 2017 totaled $531 million, an increase of $19 million, or 4%, from the prior year’s first quarter. Within the deposit category, average noninterest-bearing account balances for the first quarter increased by $24 million, or 17%, above the same period in the prior year. Average interest-bearing checking, money market, and traditional savings balances increased $2 million, or 1%, from year ago levels, while average time deposit balances decreased $7 million, or 6%, from first quarter 2016. In addition to the changes in average deposit balances, the average balance of securities sold under repurchase agreement during the first quarter of 2017 increased by $3 million, or 6%, compared to the average for the same period in the prior year. Repurchase agreements, while considered short-term borrowings, are primarily tied to overnight customer sweep accounts.

Shareholders’ equity totaled $66.9 million on March 31, 2017 with 2.7 million common shares outstanding. The tangible equity to assets ratio amounted to 9.2% on March 31, 2017, as compared to 9.1% on March 31, 2016. The Company declared a first quarter dividend of $0.20 per share producing an annualized yield of 2.6% based on the March 31, 2017 closing price of $31.00.

About CSB Bancorp, Inc.

CSB is a financial holding company headquartered in Millersburg, Ohio, with approximate assets of $680 million as of March 31, 2017. CSB provides a complete range of banking and other financial services to consumers and businesses through its wholly owned subsidiary, The Commercial and Savings Bank, with sixteen banking centers in Holmes, Wayne, Tuscarawas, and Stark counties and Trust offices located in Millersburg, North Canton, and Wooster, Ohio.

Forward-Looking Statement

This release contains forward-looking statements relating to present or future trends or factors affecting the banking industry, and specifically the financial condition and results of operations, including without limitation, statements relating to the earnings outlook of the Company, as well as its operations, markets and products. Actual results could differ materially from those indicated. Among the important factors that could cause results to differ materially are interest rate changes, softening in the economy, which could materially impact credit quality trends and the ability to generate loans, changes in the mix of the Company’s business, competitive pressures, changes in accounting, tax or regulatory practices or requirements and those risk factors detailed in the Company’s periodic reports and registration statements filed with the Securities and Exchange Commission. The Company undertakes no obligation to release revisions to these forward-looking statements or reflect events or circumstances after the date of this release.

Contact Information:

Paula J. Meiler, SVP & CFO

330-763-2873

paula.meiler@csb1.com

CSB BANCORP, INC.

CONSOLIDATED FINANCIAL HIGHLIGHTS

NOTES:

(a) - Net Interest income on a fully tax-equivalent (“FTE”) basis restates interest on tax-exempt securities and loans as if such interest were subject to federal income tax at the statutory rate. Net interest income on an FTE basis differs from net interest income under U.S. generally accepted accounting principles.

CSB BANCORP, INC.

CONSOLIDATED BALANCE SHEETS

CSB BANCORP, INC.

CONSOLIDATED STATEMENTS OF INCOME