Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-102690, 333-153174 and 333-197277 on Form S-8 and 333-220175 on Form S-3 of Dime Community Bancshares, Inc. and Subsidiaries of our report dated March 12, 2020 relating to the financial statements and effectiveness of internal control over financial reporting, appearing in this Annual Report on Form 10-K.

/s/ Crowe Horwath LLP

Crowe Horwath LLP

Livingston, New Jersey

March 12, 2020