EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT TECO Energy, Inc. owns, directly or indirectly, all the common stock of or a partnership interest in 46 subsidiaries, except as indicated below. All of the companies are organized under the laws of Florida except as indicated. Tampa Electric Company TERMCO, Inc. Power Engineering & Construction, Inc. TECO Diversified, Inc. TECO Transport & Trade Corporation Electro-Coal Transfer Corporation (a Louisiana corporation) G C Service Company, Inc. Gulfcoast Transit Company Mid-South Towing Company TECO Towing Company TECO Coal Corporation (a Kentucky corporation) Gatliff Coal Company (a Kentucky corporation) Rich Mountain Coal Company (a Tennessee corporation) Clintwood Elkhorn Mining Company (a Kentucky corporation) Pike-Letcher Land Company (a Kentucky corporation) Premier Elkhorn Coal Company (a Kentucky corporation) TECO Properties Corporation CPSC, Inc. City Plaza Partners, Ltd. 30th Street R & D Park, Inc. UTC II, Inc. Tampa Essex, Inc. Tampa Essex Place Associates, Ltd. TECO Coalbed Methane, Inc. (an Alabama corporation) TECO Finance, Inc. TECO Oil & Gas, Inc. TECO Investments, Inc. TECO Power Services Corporation Hardee Power I, Inc. Hardee Power II, Inc. Hardee Power Partners, Ltd. Lake County Power Resources, Inc. TPS Clean Coal, Inc. TPS Guatemala One, Inc. Tampa Centro Americana de Electricidad, Limitada* (a Guatemalan Limited Liability Company) TPS Operations Company TPS Panama One, Inc. TECO Energy Source, Inc. TPS International Power, Inc.(a Cayman Islands Limited Liability Company) TPS San Jose International, Inc.(a Cayman Islands Limited Liability Company) TPS San Jose, LDC (a Cayman Islands Limited Durations Company) TPS San Jose Power Holding Company, Ltd. (a Cayman Islands Limited Liability Company)** Central Generadora Electrica San Jose, Limitada*** (a Guatemalan Limited Liability Company) Tasajero I, LDC (a Cayman Islands Limited Durations company) Bosek, Gibson and Associates, Inc. TeCom Inc. * TPS Guatemala One, Inc. had an 98.15-percent partnership interest at Dec. 31, 1996. ** TPS San Jose, LDC had a 50 percent partnership interest at Dec. 31, 1996 *** TPS San Jose Power Holding Company, Ltd. had a 46-percent partnership interest at Dec. 31, 1996. 236