EXHIBIT 21 SUBSIDIARIES OF REGISTRANT The First National Bank of Long Island (INCORPORATED UNDER THE NATIONAL BANKING LAWS OF THE UNITED STATES) is a wholly owned subsidiary of The First of Long Island Corporation 10 Glen Head Road Glen Head, New York 11545 The First of Long Island Agency, Inc. (INCORPORATED UNDER THE LAWS OF THE STATE OF NEW YORK) is a wholly owned subsidiary of The First National Bank of Long Island 10 Glen Head Road Glen Head, New York 11545