city, Pinellas county, west-central Florida, U.S., near Clearwater Harbor and just south of Clearwater. The Spanish explorers Pánfilo de Narváez (Narváez, Panfilo de) (1528) and Hernando de Soto (Soto, Hernando de) (1539) visited the region. The site, first settled about 1866, was named for nearby Lake Largo (“Big Lake,” drained in the 1930s) or for Largo, Scotland. In 1888 a post office was established and the Orange Belt Railroad arrived. The town's population grew rapidly after 1960 as it developed as a retirement and tourist centre.

Largo is largely residential, and services and tourism are the basis of the economy. High-technology industries and the processing and shipping of citrus and seafood are also important. The city's Heritage Village is a complex of historic buildings and a museum. Inc. town, 1905; city, 1974. Pop. (1990) 65,674; (2000) 69,371.