1 Exhibit 21 SUBSIDIARIES Listed below are the principal subsidiaries of Kaiser Aluminum Corporation, the jurisdiction of their incorporation or organization, and the names under which such subsidiaries do business. Certain subsidiaries are omitted which, considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary. Place of Incorporation Name or Organization ---- --------------- Alpart Jamaica Inc. ...................................... Delaware Alumina Partners of Jamaica (partnership)................. Delaware Anglesey Aluminium Limited................................ United Kingdom Kaiser Alumina Australia Corporation...................... Delaware Kaiser Aluminium International, Inc....................... Delaware Kaiser Aluminum & Chemical Corporation.................... Delaware Kaiser Aluminum & Chemical of Canada Limited.............. Ontario Kaiser Bauxite Company.................................... Nevada Kaiser Bellwood Corporation............................... Delaware Kaiser Finance Corporation ............................... Delaware Kaiser Jamaica Bauxite Company (partnership).............. Jamaica Kaiser Jamaica Corporation................................ Delaware Queensland Alumina Limited................................ Queensland Volta Aluminium Company Limited........................... Ghana 2 Principal California South Carolina Domestic Laguna Niguel Greenwood Operations Administrative Offices Engineered Products and Los Angeles (City of Commerce) Greenwood Administrative Engineered Products Engineered Products Machine Shop Offices Oxnard Tennessee (Partial List) Engineered Products Jackson Pleasanton Engineered Products R&D at the Center for Technology, Texas Administrative Offices Houston Louisiana Kaiser Aluminum Corporation Headquarters Baton Rouge Sherman Alumina Business Unit Offices Engineered Products Gramercy Virginia Alumina Richmond Michigan Engineered Products Detroit (Southfield) Washington Automotive Product Development and Sales Mead Ohio Primary Aluminum, Newark Northwest Engineering Center Engineered Products Richland Oklahoma Engineered Products Tulsa Tacoma Engineered Products Primary Aluminum Trentwood Flat-Rolled Products Principal Australia Jamaica Worldwide Queensland Alumina Limited (28.3%) Alumina Partners of Jamaica (65%) Operations Alumina Bauxite, Alumina (Partial List) Canada Kaiser Jamaica Bauxite Company (49%) Kaiser Aluminum & Chemical of Bauxite Canada Limited (100%) Wales, United Kingdom Engineered Products Anglesey Aluminium Limited (49%) Ghana Primary Aluminum Volta Aluminium Company Limited (90%) Primary Aluminum