EXHIBIT 21 SUBSIDIARIES OF SBA COMMUNICATIONS CORPORATION NAME RELATIONSHIP JURISDICTION - ---------------------------- -------------------------------------------- ------------ SBA Telecommunications, Inc. 100% owned by SBA Communications Corporation Florida SBA Network Services, Inc. 100% owned by SBA Telecommunications, Inc. Florida SBA Towers, Inc. 100% owned by SBA Telecommunications, Inc. Florida SBA Properties, Inc. 100% owned by SBA Telecommunications, Inc. Florida SBA Sites, Inc. 100% owned by SBA Telecommunications, Inc. Florida SBA Leasing, Inc. 100% owned by SBA Telecommunications, Inc. Florida As of December 31, 2002, SBA Telecommunications, Inc. owned, directly and indirectly, twelve additional subsidiaries, nine of which are incorporated in U.S. jurisdictions and three of which are organized in foreign jurisdictions. These subsidiaries, in the aggregate as a single subsidiary, would not constitute a "Significant Subsidiary" as defined in Rule 405 under the Securities Act as of December 31, 2002.