Jacksonville (pop. 661,200), city in Florida, seat of Duval County. It is located in the northeastern part of the state, on the St. Johns River, about 20 mi (32 km) from the Atlantic Ocean. Jacksonville is a major port and commercial center. Among its industries are the manufacture of paper, wood products, fertilizer, cigars, and machinery. It is also the site of 2 naval air stations. First settled in 1816, Jacksonville was laid out in 1822 and named for Andrew Jackson. It was incorporated in 1832.
See also: Florida.