1 EXHIBIT 21 SUBSIDIARIES OF FIRSTMERIT CORPORATION AS OF JANUARY 1, 1998 Citizens Investment Corporation Ohio corporation Citizens National Bank National Banking Association Citizens Savings Corporation of Stark County Ohio corporation FirstMerit Bank, N.A. National Banking Association - Abell & Associates, Inc. Ohio corporation - FirstMerit Leasing Company Ohio corporation - FirstMerit Securities, Inc. Ohio corporation - OPN, Inc. Ohio corporation - NB 5 Financial Services, Inc. Ohio corporation FirstMerit Community Development Corporation Ohio corporation FirstMerit Credit Life Insurance Company Arizona corporation Peoples Bank, N.A. National Banking Association - FirstMerit Insurance Agency, Inc. Ohio corporation Peoples National Bank National Banking Association Indirect Subsidiary Owned by Subsidiary Banks - - --------------------------------------------- FirstMerit Mortgage Corporation Ohio corporation