EXHIBIT 21 MB FINANCIAL, INC. SUBSIDIARIES OF MB FINANCIAL, INC. State of Subsidiary Ownership Incorporation ---------- --------- ------------- Manufacturers National Corporation Wholly-owned subsidiary of MB Financial, Inc. Illinois Coal City Capital Trust I Wholly-owned subsidiary of MB Financial, Inc. Delaware Manufacturers Bank Wholly-owned subsidiary of Manufacturers National Corporation Illinois Ashland Management Agency, Inc. Wholly-owned subsidiary of Manufacturers Bank Illinois MB1200 Corporation Wholly-owned subsidiary of Manufacturers Bank Illinois Manufacturers Deferred Exchange Corporation Wholly-owned subsidiary of Manufacturers Bank Illinois Manufacturers Community Development Corporation Wholly-owned subsidiary of Manufacturers Bank Illinois Manufacturers Funding Corporation Wholly-owned subsidiary of Manufacturers Bank Illinois Avondale Financial Services, Inc. Wholly-owned subsidiary of Manufacturers Bank Illinois 135