UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934

(Amendment No.     )

Filed by the Registrant  ☒                            Filed by a Party other than the Registrant  ☐

Check the appropriate box:

☐	Preliminary Proxy Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material Pursuant to §240.14a-12

Flushing Financial Corporation

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

☒	No fee required.
☐	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
	(1)	Title of each class of securities to which transaction applies:
	(2)	Aggregate number of securities to which transaction applies:
	(3)	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
	(4)	Proposed maximum aggregate value of transaction:
	(5)	Total fee paid:
☐	Fee paid previously with preliminary materials.
☐	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
	(1)	Amount Previously Paid:
	(2)	Form, Schedule or Registration Statement No.:
	(3)	Filing Party:
	(4)	Date Filed:

***ExerciseYourRighttoVote*** Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting to Be Held on May 26, 2020. Meeting Information FLUSHING FINANCIAL CORPORATION Meeting Type: Annual Meeting For holders as of: March 30, 2020 Date: May 26, 2020 Time: 1:00 p.m., NewYorkTime Location: RXR Plaza Conference Center 625 RXR Plaza, Lobby Level Uniondale, New York 11556 You are receiving this communication because you hold shares in the company named above. FLUSHING FINANCIAL CORPORATION 220 RXR PLAZA This is not a ballot. You cannot use this notice to vote these UNIONDALE, NY 11556 ATTN: SUSAN K. CULLEN the shares. more This complete communication proxy materials presents that only are an overview available to of online you on at the www. Internet. proxyvote. You com may or easily view request the proxy a paper materials copy (see reverse side). We information encourage contained you to access in the proxy and review materials all of before the important voting. Z76707 - See the reverse side of this notice to obtain proxy materials and voting instructions. P37735 D09145 -

BeforeYouVote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: NOTICE AND PROXY STATEMENT 10-K/WRAP How to View Online: Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (located on the following page) and visit: www.proxyvote.com. How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request: 2) 1) BY BY TELEPHONE: INTERNET: 1-800-579-1639 www.proxyvote. com 3) BY E-MAIL*: sendmaterial@proxyvote.com * If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (located on the following page) in the subject line. Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before May 12, 2020 to facilitate timely delivery. HowToVote Please Choose One of the Following Voting Methods Vote In Person: Many stockholder meetings have attendance requirements including,but not limited to,the possession Z76707 of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special - requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. P37735 Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the - box marked by the arrowï§XXXX XXXX XXXX XXXX (located on the following page) available and follow the instructions. D09146 Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

Voting Items A nominees, FOR Proposal 2, and FOR Proposal 3. Proposals —The Board of Directors recommends a vote FOR the election of all 1. Election of Class A Directors (for a term expiring in 2023) Nominees: 1a. John J. McCabe 1b. Donna M. O’Brien 1c. Michael J. Russo 1d. Caren C. Yoh 2. Advisory vote to approve executive compensation. 3. Ratification of appointment of BDO USA, LLP as the Independent Registered Public Accounting Firm for the year ending December 31, 2020. In their discretion, the proxies are authorized to vote upon other business as may properly come before the meeting or at any adjournment thereof. Z76707 P37735 -D09147 -

D09148-P37735-Z76707