Exhibit 99.1

January 25, 2017

Press Release

FARMERS NATIONAL BANC CORP. ANNOUNCES

2016 FOURTH QUARTER AND ANNUAL FINANCIAL RESULTS

CANFIELD, Ohio (January 25, 2017) – Farmers National Banc Corp. (Farmers) (NASDAQ: FMNB) today reported financial results for the three and twelve months ended December 31, 2016.

Net income for the three months ended December 31, 2016 was $5.4 million, or $0.20 per diluted share, which compares to $3.2 million, or $0.12 per diluted share, for the three months ended December 31, 2015. Excluding expenses related to acquisition activities, net income for the two periods was $5.4 million or $0.20 per diluted share and $4.3 million or $0.16 per diluted share, respectively.

Annualized return on average assets and return on average equity were 1.08% and 9.74%, respectively, for the three month period ending December 31, 2016, compared to 0.68% and 6.51% for the same three month period in 2015. Excluding expenses related to acquisition activities, the annualized return on average assets and return on average equity for the quarter ended December 31, 2016 were 1.08% and 9.77% compared to 0.93% and 8.87% for the same quarter in 2015.

Net income for the year ended December 31, 2016 was $20.6 million, or $0.76 per diluted share, compared to $8.1 million or $0.36 per diluted share for 2015. Return on average assets and return on average equity were 1.07% and 9.72%, respectively, for the year ending December 31, 2016, compared to 0.54% and 4.97% for the same period in 2015. Excluding expenses related to acquisition activities net income for the two years was $21.0 million, or $0.78 per share and $12.9 million or $0.57 per share, respectively. The annualized return on average assets and return on average equity excluding acquisition costs were 1.09% and 9.92% in 2016, compared to 0.87% and 7.95% in 2015, respectively.

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 to meet all the needs of all Farmers’ customers.

Kevin J. Helmick, President and CEO, stated, “We are happy to report a record year in net income, which has been achieved through the successful integration of our recent mergers, our 10% organic loan growth, and our continued focus on increasing noninterest income and careful management of noninterest expenses.”

2016 Fourth Quarter Financial Highlights

Total loans were $1.43 billion at December 31, 2016, compared to $1.30 billion at December 31, 2015, representing an increase of 10.1%. 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, agricultural, residential real estate and consumer loan portfolios. Loans now comprise 76.3% of the Bank’s average earning assets for the year ended December 31, 2016, an improvement compared to 70.1% for the same period in 2015. This improvement along with the growth in earning assets has resulted in a 41% increase in tax equated loan income from 2015 to 2016.

Non-performing assets to total assets remain at a safe level, currently at 0.44%. Early stage delinquencies also continue to remain at low levels, at $12.7 million, or 0.89% of total loans, at December 31, 2016. Net charge-offs for the current quarter were $656 thousand, up $360 thousand compared to $296 thousand in the same quarter in 2015, however total net charge-offs as a percentage of average net loans outstanding decreased from 0.23% for the year ended December 31, 2015 to 0.15% 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 December 31, 2016 was 3.95%, a 4 basis points decrease from the quarter ended December 31, 2015. In comparing the fourth quarter of 2016 to the same period in 2015, asset yields decreased 1 basis point, while the cost of interest-bearing liabilities increased 3 basis points. The net interest margin is impacted by 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 7 basis points lower or 3.88% for the quarter ended December 31, 2016.

Noninterest income increased 17.4% to $6.1 million for the quarter ended December 31, 2016 compared to $5.2 million in 2015. Gains on the sale of mortgage loans increased $431 thousand, or 106% in the current year’s quarter compared to the same quarter in 2015. Insurance agency commissions increased $384 thousand in comparing the same two quarters due mainly to the acquisition of the Bowers Group. Other operating income increased $148 thousand or 14% in 2016, mainly as a result of an increase in income from an investment in a Small Business Investment Company (SBIC) fund.

Farmers has remained committed to managing the level of noninterest expenses. Total noninterest expenses for the fourth quarter of 2016 decreased to $15.0 million compared to $16.6 million in the same quarter in 2015, primarily as a result of a $1.7 million decrease in merger related costs. Annualized noninterest expenses measured as a percentage of quarterly average assets decreased from 3.58% in the fourth quarter of 2015 to 3.03% in the fourth quarter of 2016.

The efficiency ratio for the quarter ended December 31, 2016 improved to 60.37% compared to 73.07% for the same quarter in 2015. The main factors leading to the improvement in the efficiency ratio were the increase in net interest income and noninterest income, the decrease in merger related costs, along with the stabilized level of noninterest expenses relative to average assets as explained in the preceding paragraphs.

2017 Outlook

Mr. Helmick added, “We are pleased with our financial results for 2016. We remain well positioned to grow and create value for all our stakeholders, as our commitment to provide innovative solutions for our customers, associates, shareholders, and local communities continues.

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, return on average tangible assets, return on average tangible equity 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.

Average Balance Sheets and Related Yields and Rates

(Dollar Amounts in Thousands)