Lake Worth, city (1990 pop. 28,564), Palm Beach co., SE Fla., on Lake Worth (a lagoon); inc. 1913. It is a residential suburb and resort center popular for its bathing and fishing facilities. Sports equipment, tents and awnings, apparel, and food products are among its manufactures. The city grew during the 1970s and 80s with the development of the Miami-Ft. Lauderdale region.