Exhibit 21

Subsidiaries of Harris Interactive Inc.

• GSBC Ohio Corporation, an Ohio Corporation

• Louis Harris & Associates, Inc., a New York Corporation

• Harris Interactive International Inc., a Delaware Corporation

• Harris Interactive UK Limited, a United Kingdom Corporation

• HI UK Holdings Limited, a United Kingdom Corporation

• Romtec UK Limited, a United Kingdom Corporation

• Teligen UK Limited, a United Kingdom Corporation

• Novatris, S.A., a French Corporation

• Wirthlin Worldwide, LLC, a Delaware Limited Liability Company

• The Wirthlin Group International, LLC, a Delaware Limited Liability Company

• Wirthlin UK Limited, a United Kingdom Corporation

• Wirthlin Europe Limited, a United Kingdom Corporation

• Harris Interactive Asia, LLC, a Delaware Limited Liability Company