Exhibit 99.1

October 20, 2016

Press Release

FARMERS NATIONAL BANC CORP. ANNOUNCES

2016 THIRD QUARTER FINANCIAL RESULTS

CANFIELD, Ohio (October 20, 2016) – Farmers National Banc Corp. (Farmers) (NASDAQ: FMNB) today reported financial results for the three and nine months ended September 30, 2016.

Net income for the three months ended September 30, 2016 was $5.4 million, or $0.20 per diluted share, which compares to $1.9 million, or $0.07 per diluted share, for the three months ended September 30, 2015. Excluding expenses related to acquisition activities, net income for the two periods was $5.4 million or $0.20 per diluted share and $3.7 million or $0.14 per diluted share, respectively. In comparing the third quarter’s results to the most recent previous quarter, net income of $5.4 million increased 7% compared to $5.0 million for the quarter ended June 30, 2016.

Annualized return on average assets and return on average equity were 1.10% and 9.97%, respectively, for the three month period ending September 30, 2016, compared to 1.06% and 9.69% for the linked quarter. Excluding expenses related to acquisition activities, the annualized return on average assets and return on average equity for the quarter ended September 30, 2016 were 1.10% and 10.02% compared to 0.87% and 7.97% for the same quarter in 2015.

Net income for the nine months ended September 30, 2016 was $15.2 million, or $0.56 per diluted share, compared to $4.9 million or $0.23 per diluted share for same nine month period in 2015. Annualized return on average assets and return on average equity were 1.06% and 9.74%, respectively, for the nine month period ending September 30, 2016, compared to 0.48% and 4.31% for the same period in 2015. Excluding expenses related to acquisition activities, net income for the two nine month periods was $15.6 million, or $0.58 per share and $8.6 million or $0.40 per share, respectively, and the annualized return on average assets and return on average equity were 1.09% and 10.0% in 2016, compared to 0.83% and 7.41% in 2015, respectively.

During 2015, Farmers completed the mergers of National Bancshares Corporation (NBOH) the holding company for the First National Bank of Orrville, and Tri-State 1^st Banc Inc. (Tri-State), the holding company for 1st National Community Bank of East Liverpool. These transactions resulted in the addition of $676 million in assets and 17 full-service branches in Northeastern Ohio and 1 in Beaver County in Pennsylvania.

On June 1, 2016 Farmers completed the acquisition of Bowers Insurance Agency, Inc. (“Bowers Group”). The Bowers Group will continue to operate under its name from its current location in Cortland, Ohio as part of Farmers’ wholly-owned insurance agency subsidiary Farmers National Insurance, LLC. The strategic acquisition is expected to enhance Farmers’ current company and product line up, and offer broader options of commercial, farm, home, and auto property/casualty insurance carriers to meet all the needs of all Farmers’ customers.

Kevin J. Helmick, President and CEO, stated, “We are happy to report a record quarter in net income, which has been achieved through the successful integration of our recent mergers, our 12% organic loan growth, and our continued focus on increasing noninterest income and careful management of noninterest expenses.”

2016 Third Quarter Financial Highlights

Total loans were $1.40 billion at September 30, 2016, compared to $1.30 billion at December 31, 2015, representing an annualized growth of 10.2%. The increase in loans is a direct result of Farmers’ focus on loan growth utilizing a talented lending and credit team, while adhering to a sound underwriting discipline. Most of the increase in loans has occurred in the commercial real estate, commercial and industrial, residential real estate and consumer loan portfolios. Loans now comprise 76.5% of the Bank’s third quarter average earning assets at September 30, 2016, an improvement compared to 73.8% at the same time in 2015. This improvement along with the growth in earning assets organically and through merger activity has resulted in a 20% increase in tax equated loan income from the third quarter of 2015 to the same quarter in 2016.

Non-performing assets to total assets remain at a safe level, currently at 0.43%. Early stage delinquencies also continue to remain at low levels, at $11.0 million, or 0.79% of total loans, at September 30, 2016. Net charge-offs for the current quarter were $312 thousand, up $101 thousand compared to $211 thousand in the same quarter in 2015. It is important to note that annualized net charge-offs as a percentage of average net loans outstanding decreased from 0.10% for the 3 months ended September 30, 2015 to 0.09% for the same period in 2016. Lending to the energy sector is insignificant and less than 1% of the loan portfolio.

The net interest margin for the three months ended September 30, 2016 was 3.97%, a 13 basis points increase from the quarter ended September 30, 2015. In comparing the third quarter of 2016 to the same period in 2015, asset yields increased 13 basis points, while the cost of interest-bearing liabilities decreased 2 basis points. Another key contributor to the increase in net interest margin was the shift in the mix of earning assets from securities to loans. The increased margin is also partially due to the additional accretion as a result of the discounted loan portfolios acquired in the NBOH and Tri-State mergers. Excluding the amortization of premium on time deposits and FHLB advances along with the accretion of the acquired loan discount, the net interest margin would have been 8 basis points lower or 3.89% for the quarter ended September 30, 2016.

Noninterest income increased 38.4% to $6.5 million for the quarter ended September 30, 2016 compared to $4.7 million in 2015. Deposit account income increased $128 thousand, or 14%, in the current year’s quarter compared to the same quarter in 2015 and gains on the sale of mortgage loans increased $648 thousand, or 156%, in comparing the same two quarters. Insurance agency commissions increased $439 thousand and debit card interchange fees also increased $147 thousand or 29% in comparing the third quarter of 2015 to the same quarter in 2016.

Farmers has remained committed to managing the level of noninterest expenses. Total noninterest expenses for the third quarter of 2016 were $15.2 million compared to $14.8 million in the linked quarter, primarily as a result of increased salaries and employee benefits related to the acquisition of the Bowers Group on June 1, 2016 and increased incentive compensation resulting from improved corporate profitability. Annualized noninterest expenses measured as a percentage of quarterly average assets increased slightly from 3.06% in the third quarter of 2015 to 3.12% in the third quarter of 2016. These same ratios excluding merger related expenses increased from 3.04% in the third quarter of 2015 to 3.11% in the third quarter of 2016.

The efficiency ratio for the quarter ended September 30 2016 improved to 60.9% compared to 76.6% for the same quarter in 2015. Excluding expenses related to acquisition activities, the efficiency ratios for the same periods were 60.7% and 66.5%, respectively. The main factors leading to the improvement in the efficiency ratio was the increase in net interest income and noninterest income, along with the stabilized level of noninterest expenses relative to average assets as explained in the preceding paragraphs.

2016 Outlook

Mr. Helmick added, “We are encouraged by the improvement in our profitability thus far in 2016. We will continue to remain focused on properly executing our growth oriented business model, while creating long-term value for our shareholders. We remain committed to the businesses and families we serve and to our community banking approach and culture.”

Founded in 1887, Farmers National Banc Corp. is a diversified financial services company headquartered in Canfield, Ohio, with $2 billion in banking assets and $1 billion in trust assets. Farmers National Banc Corp.’s wholly-owned subsidiaries are comprised of The Farmers National Bank of Canfield, a full-service national bank engaged in commercial and retail banking with 39 banking locations in Mahoning, Trumbull, Columbiana, Stark, Wayne, Medina and Cuyahoga Counties in Ohio and Beaver County in Pennsylvania, Farmers Trust Company, which operates three trust offices and offers services in the same geographic markets and National Associates, Inc.. Farmers National Insurance, LLC and Bowers Insurance Agency, Inc., wholly-owned subsidiaries of The Farmers National Bank of Canfield, offer a variety of insurance products.

Non-GAAP Disclosure

This press release includes disclosures of Farmers’ tangible common equity ratio and net income, excluding costs related to acquisition activities, which are financial measures not prepared in accordance with generally accepted accounting principles in the United States (GAAP). A non-GAAP financial measure is a numerical measure of historical or future financial performance, financial position or cash flows that excludes or includes amounts that are required to be disclosed by GAAP. Farmers believes that these non-GAAP financial measures provide both management and investors a more complete understanding of the underlying operational results and trends and Farmers’ marketplace performance. The presentation of this additional information is not meant to be considered in isolation or as a substitute for the numbers prepared in accordance with GAAP. The reconciliations of non-GAAP financial measures are included in the tables following Consolidated Financial Highlights below.

Forward-Looking Statements

This earnings release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements about Farmers’ financial condition, results of operations, asset quality trends and profitability. Forward-looking statements are not historical facts but instead represent only management’s current expectations and forecasts regarding future events, many of which, by their nature, are inherently uncertain and outside of Farmers’ control. Forward-looking statements are preceded by terms such as “expects,” “believes,” “anticipates,” “intends” and similar expressions, as well as any statements related to future expectations of performance or conditional verbs, such as “will,” “would,” “should,” “could” or “may.” Farmers’ actual results and financial condition may differ, possibly materially, from the anticipated results and financial condition indicated in these forward-looking statements. Factors that could cause Farmers’ actual results to differ materially from those described in the forward-looking statements can be found in Farmers’ Annual Report on Form 10-K for the year ended December 31, 2015, as amended, which has been filed with the Securities and Exchange Commission (SEC) and is available on Farmers’ website (www.farmersbankgroup.com) and on the SEC’s website (www.sec.gov). Forward-looking statements are not guarantees of future performance and should not be relied upon as representing management’s views as of any subsequent date. Farmers does not undertake any obligation to update the forward-looking statements to reflect the impact of circumstances or events that may arise after the date of the forward-looking statements.

Farmers National Banc Corp. and Subsidiaries

Consolidated Financial Highlights

(Amounts in thousands, except per share results) Unaudited

Average Balance Sheets and Related Yields and Rates

(Dollar Amounts in Thousands)