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( Mark One ) ☑ ☐ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 10 - K Annual Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the fiscal year ended December 31 , 2020 or Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-35296 Farmers National Banc Corp. ( Exact name of registrant as specified in its charter ) Ohio ( State or other jurisdiction of incorporation or organization ) 20 South Broad Street , Canfield , Ohio ( Address of principal executive offices ) Title of each class Registrant's telephone number , including area code : 330-533-3341 Securities registered pursuant to Section 12 ( b ) of the Act : Common Shares , no par value 34-1371693 ( I.R.S. Employer Identification No. ) 44406 ( Zip Code ) Name of each exchange on which registered The NASDAQ Stock Market LLC Securities registered pursuant to Section 12 ( g ) of the Act : None ( Title of Class ) Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes ☐ No ☑ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes □ No ☑ 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 ☑ No □ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted 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 such files ) . Yes ☑ No □ Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , smaller reporting company , or an emerging growth company . See the definition of " large accelerated filer , " " accelerated filer , ” “ smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Non - accelerated filer Emerging growth company ☐ П ☐ Accelerated filer Smaller reporting company ☐ If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . ☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No ☑ As of June 30 , 2020 , the estimated aggregate market value of the registrant's common shares , no par value ( the only common equity of the registrant ) , held by non - affiliates of the registrant was approximately $ 334.2 million based upon the last sales price as of June 30 , 2020 reported on NASDAQ . ( The exclusion from such amount of the market value of the common shares owned by any person shall not be deemed as admission by the registrant that such person is an affiliate of the registrant ) . Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , No Par Value Trading Symbol FMNB Name of each exchange on which registered The NASDAQ Stock Market As of March 1 , 2021 , the registrant had outstanding 28,312,557 common shares , no par value . DOCUMENTS INCORPORATED BY REFERENCE Document Portions of the registrant's definitive proxy statement for the 2021 Annual Meeting of Shareholders Part of Form 10 - K into which Document is Incorporated III