CITIZENS FINANCIAL SERVICES INC

The Board is making available this Proxy Statement for the purpose of requesting that you allow your shares of the Company’s common stock to be represented at the Annual Meeting by the persons named in the proxy card. All shares of common stock represented at the Annual Meeting by properly executed and dated proxy cards will be voted according to the instructions indicated on the proxy card or as indicated when you vote via the Internet. If you sign, date and return a proxy card without giving voting instructions, your shares will be voted as recommended by the Board.

THE BOARD UNANIMOUSLY RECOMMENDS A VOTE:

If any matter not described in this Proxy Statement is properly presented at the Annual Meeting, the persons named on the proxy card will use their own best judgment to determine how to vote your shares. The Company does not know of any other matters to be presented at the Annual Meeting.

You may revoke your proxy at any time before the vote is taken at the meeting. To revoke your proxy, you must either advise the Secretary of the Company in writing before your common stock has been voted at the Annual Meeting, deliver a signed later-dated proxy, vote on a later date via the Internet, or attend the meeting and vote your shares in person. Please note all votes cast via the Internet must be cast prior to 11:59 p.m. Eastern Time on April 20, 2026. Attendance at the Annual Meeting will not in itself constitute revocation of your proxy.

If your common stock is held in “street name,” you will receive instructions from your broker, bank or other nominee that you must follow in order to have your shares voted. Your broker, bank or other nominee may allow you to deliver your voting instructions via telephone or the Internet. Please see the instruction form provided by your broker, bank or other nominee that accompanies this Proxy Statement.

CORPORATE GOVERNANCE AND BOARD MATTERS