Exhibit 21 HARRAH'S ENTERTAINMENT, INC. SUBSIDIARIES Jurisdiction Percentage Date of of of Incorpor- FEIN Name Incorporation Ownership ation Number ---- ------------- ---------- --------- ------ Aster Insurance Ltd. Bermuda 100% 02/06/90 62-1428220 HEI Acquisition Corp. II Nevada 100% 07/22/98 88-0407469 Harrah's Operating Company, Inc. Delaware 100% 08/08/83 75-1941623 Dusty Corporation Nevada 100% 07/02/98 88-0398744 Harrah South Shore Corporation California 100% 10/02/59 88-0074793 Harrah's - Holiday Inns of New Jersey, Inc. New Jersey 100% 09/19/79 62-1071040 Harrah's Alabama Corporation Nevada 100% 09/09/93 88-0308027 Harrah's Arizona Corporation Nevada 100% 01/26/93 62-1523519 Harrah's Asia Development Company Nevada 100% 09/20/96 88-0368569 Harrah's Asia Investment Company Nevada 100% 09/20/96 88-0368568 Harrah's Asia Management Company Nevada 100% 09/20/96 88-0368567 Harrah's Atlantic City, Inc. New Jersey 100% 02/13/79 93-0737757 Harrah's Aviation, Inc. Tennessee 100% 03/11/63 62-0694622 HCAL Corporation Nevada 100% 02/02/94 88-0313169 Harrah's Crescent City Investment Company Nevada 100% 03/28/97 86-0863877 Harrah's Illinois Corporation Nevada 100% 12/18/91 88-0284653 Van Buren Leasing Corporation(1) Nevada 100% 08/30/96 93-1218215 Harrah's Indiana Casino Corporation Nevada 100% 09/09/93 88-0308079 Harrah's Indiana Management Corporation Nevada 100% 09/09/93 88-0308082 Harrah's Interactive Entertainment Company Nevada 100% 09/21/94 88-0326037 Harrah's Interactive Investment Company Nevada 100% 09/21/94 88-0326036 - ---------------------- (1) 100% owned by Des Plaines Development Limited Partnership of which Harrah's Illinois Corporation is 80% partner. 1 Exhibit 21 HARRAH'S ENTERTAINMENT, INC. SUBSIDIARIES Jurisdiction Percentage Date of of of Incorpor- FEIN Name Incorporation Ownership ation Number ---- ------------- ---------- --------- ------ Harrah's Kansas Casino Corporation Nevada 100% 11/12/93 88-0313173 HPB Corporation Kansas 100% 11/13/97 74-2859636 Harrah's Las Vegas, Inc. Nevada 100% 03/21/68 88-0116377 Harrah's Laughlin, Inc. Nevada 100% 07/10/87 88-0230282 Harrah's Louisiana Investment Company Nevada 100% 10/22/98 88-0407915 Harrah's Management Company Nevada 100% 04/07/83 88-0187173 Harrah's Marketing Services Corporation Nevada 100% 08/21/97 86-0889202 Harrah's Maryland Heights Corporation Nevada 100% 07/30/93 88-0306276 Harrah's Maryland Heights LLC(2) Delaware 99% 10/16/95 43-1725857 Harrah's Maryland Heights Operating Company Nevada 100% 06/20/95 88-0343024 Harrah's Michigan Corporation Nevada 100% 06/15/93 88-0307990 Harrah's Minnesota Corporation Nevada 100% 10/20/92 88-0292681 Harrah's NC Casino Company, LLC(3) North Carolina 99% 04/21/95 56-1936298 Harrah's New Jersey, Inc. New Jersey 100% 09/13/78 22-2219370 Harrah's New Orleans Management Company Nevada 100% 05/21/93 62-1534758 Harrah's New Zealand Inc. Nevada 100% 02/18/92 88-0292682 Harrah's North Kansas City LLC(4) Missouri 100% 12/15/99 62-1802713 Harrah's of Jamaica, Ltd. Jamaica 100% 07/12/85 N/A Harrah's Operating Company Memphis, Inc. Delaware 100% 12/15/99 62-1802711 Harrah's Pennsylvania Development Co. Nevada 100% 05/18/94 88-0320301 - ---------------------- (2) 99% Harrah's Operating Company, Inc., 1% Harrah's Maryland Heights Operating Company (3) 99% Harrah's Operating Company, nc., 1% Harrah's Management Company (4) Successor by merger with Harrah's-North Kansas City Corporation; 100% Harrah's Operating Company, Inc. 2 Exhibit 21 HARRAH'S ENTERTAINMENT, INC. SUBSIDIARIES Jurisdiction Percentage Date of of of Incorpor- FEIN Name Incorporation Ownership ation Number ---- ------------- ---------- --------- ------ Harrah's Pittsburgh Management Company Nevada 100% 06/08/94 88-0320269 Harrah's Red River Corporation Nevada 100% 08/05/96 88-0365487 Harrah's Reno Holding Company, Inc. Nevada 100% 02/23/88 62-1440237 Harrah's Shreveport Investment Company, Inc. Nevada 100% 04/23/92 88-0292677 Harrah's Shreveport Management Company, Inc. Nevada 100% 04/23/92 88-0292678 Harrah's Skagit Valley Agency Corporation Nevada 100% 11/08/95 88-0348745 Harrah's Southeast Washington Casino Corporation Nevada 100% 11/21/95 88-0352305 Harrah's Southwest Michigan Casino Nevada 100% 04/06/95 88-0337476 Corporation Harrah's Travel, Inc. Nevada 100% 07/30/98 88-0400542 Harrah's Tunica Corporation Nevada 100% 08/10/92 88-0292680 Harrah's Vicksburg Corporation Nevada 100% 07/13/92 88-0292320 Harrah's Washington Corporation Nevada 100% 02/03/94 88-0313171 Harrah's Wheeling Corporation Nevada 100% 04/29/94 88-0317848 Rio Hotel & Casino, Inc. Nevada 100% 06/14/88 88-0288115 Rio Resort Properties, Inc. Nevada 100% 09/04/87 88-0229914 Rio Properties, Inc. Nevada 100% 02/24/92 95-3671082 Cinderlane, Inc. Nevada 100% 12/29/94 88-3331880 Twain Avenue, Inc. Nevada 100% 08/08/97 88-0438885 McKellar Industrial Park Owner's Nevada 100% 12/03/84 Association, Inc. (Non-Profit) HLG, Inc. Nevada 100% 10/28/96 88-0371040 Rio Leasing, Inc. Nevada 100% 09/10/96 88-0369074 Rio Development Company, Inc. Nevada 100% 08/28/96 88-0220505 3 Exhibit 21 HARRAH'S ENTERTAINMENT, INC. SUBSIDIARIES Jurisdiction Percentage Date of of of Incorpor- FEIN Name Incorporation Ownership ation Number ---- ------------- ---------- --------- ------ Rio Vegas Hotel Casino, Inc. Nevada 100% 09/28/88 N/A Showboat, Inc. Nevada 100% 02/16/60 88-0090766 Showboat Australia PTY Limited(5) Australia 50% 08/11/93 N/A Ocean Showboat, Inc. New Jersey 100% 09/12/83 22-2500790 Atlantic City Showboat, Inc. New Jersey 100% 01/10/84 22-2500794 Ocean Showboat Finance Corporation New Jersey 100% 12/22/86 22-2773679 Showboat Development Company Nevada 100% 06/09/83 88-0227522 Lake Pontchartrain Showboat, Inc. Nevada 100% 03/18/93 88-0297741 Showboat Canada, Inc. Canada 100% 06/28/93 N/A Dion Showboat, Inc. Canada 100% 06/28/93 N/A Showboat Grande, Inc. Nevada 100% 06/08/93 88-0302251 Showboat Indiana, Inc. Nevada 100% 09/13/93 88-0308090 Showboat LMI, Inc. Nevada 100% 07/26/94 None Showboat Louisiana, Inc. Nevada 100% 05/18/93 88-0302250 Showboat Missouri, Inc. Nevada 100% 07/26/94 88-0344271 Showboat Mohawk, Inc. Nevada 100% 07/07/93 88-0308091 Showboat New Hampshire, Inc. Nevada 100% 07/26/94 None Showboat Rockingham Company, LLC(6) New Hampshire 50% 09/09/97 Showboat One, Inc. Nevada 100% 07/26/94 None Showboat Six, Inc. Nevada 100% 07/26/94 None Showboat Seven, Inc. Nevada 100% 07/26/94 None Showboat Eight, Inc. Nevada 100% 07/26/94 None Showboat Nine, Inc. Nevada 100% 07/27/94 None Showboat Ten, Inc. Nevada 100% 07/27/94 None Showboat Eleven, Inc. Nevada 100% 07/27/94 None Showboat Twelve, Inc. Nevada 100% 07/27/94 None Showboat Thirteen, Inc. Nevada 100% 07/27/94 None Showboat Fourteen, Inc. Nevada 100% 07/27/94 None - ---------------------- (5) 50% Showboat, Inc., 50% Showboat Development Company (6) 50% Showboat New Hampshire, Inc., 50% Rockingham Venture, Inc. 4 Exhibit 21 HARRAH'S ENTERTAINMENT, INC. SUBSIDIARIES Jurisdiction Percentage Date of of of Incorpor- FEIN Name Incorporation Ownership ation Number ---- ------------- ---------- --------- ------ Showboat Fifteen, Inc. Nevada 100% 07/27/94 88-0335287 Showboat Finance Corporation Nevada 100% 05/10/94 None Showboat Intellectual Property, Inc. Nevada 100% 01/25/94 88-0314414 Showboat Land Company Nevada 100% 11/12/97 88-0378914 Showboat Operating Company Nevada 100% 04/10/73 88-0121120 Showboat Land LLC(7) Nevada 1% 11/04/97 88-0382943 Trigger Real Estate Corporation Nevada 100% 07/02/98 88-0398745 Waterfront Entertainment and Development, Inc. Indiana 100% 07/19/93 - ---------------------- (7) 1% Showboat Operating Company, 99% Showboat Land Holding Limited Partnership 5