EXHIBIT 21 MB FINANCIAL, INC. SUBSIDIARIES OF MB FINANCIAL, INC. SUBSIDIARY OWNERSHIP STATE OF INCORPORATION Manufacturers National Corporation Wholly-owned subsidiary of MB Financial, Inc. Illinois Avondale Financial Services, Inc. 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 Manufacturers Bank Wholly-owned subsidiary of Manufacturers National Illinois Corporation Ashland Management Agency, Inc. Wholly-owned subsidiary of Manufacturers Bank Illinois MB 1200 Corporation Wholly-owned subsidiary of Manufacturers Bank Illinois Manufacturers Deferred Exchange Corporation Wholly-owned subsidiary of Manufacturers Bank Illinois Coal City Capital Trust I Wholly-owned subsidiary of MB Financial, Inc. Delaware