Exhibit 21.1 GREATER BAY BANCORP ANNUAL REPORT ON FORM 10-K EXHIBIT 21.1--SUBSIDIARIES OF THE REGISTRANT Greater Bay Bancorp owns 100.0% of the outstanding voting securities of the following corporations, all of which are included in Greater Bay Bancorp's consolidated financial statements: Name Jurisdiction of Incorporation ---- ----------------------------- Mid-Peninsula Bank........................... California Cupertino National Bank...................... California Peninsula Bank of Commerce................... California Golden Gate Bank............................. California Pacific Business Funding Corporation......... California GBB Capital I................................ Delaware GBB Capital II............................... Delaware