Haines City is a city in Polk County, Florida. The population was 13,174 at the 2000 census. As of 2010, the census count was 20,535. Haines City is the third most populous city in Polk County, Florida. It is part of the Lakeland–Winter Haven Metropolitan Statistical Area.
The city was platted in 1885, shortly after the South Florida Railroad reached the area.The city was first known as Clay Cut, but there was no railroad station. It is said that the inhabitants persuaded the railroad company to build a station by agreeing to rename their city Haines City, to honor a senior railroad official, Colonel Henry Haines.
The early settlers planted citrus groves, and citrus growing and processing became the main industry of the city.
From 1974 to 1986 Circus World, a theme park created by the Ringling Brothers and Barnum & Bailey Circus, was open just north of Haines City. After Circus World shut down, Boardwalk and Baseball opened on the same site. It featured carnival games and theme park styled rides like the Grand Rapids Flume. It closed in 1990, and the site has been redeveloped as a residential and shopping complex named Posner Park.
In recent years Haines City has seen explosive growth, largely because of its easy access to Orlando and Walt Disney World Resort. New residential areas have been developed on the edges of the city. On high ground in the north of the city, Southern Dunes, a golf and country club with both vacation homes and residential homes, was developed between 1995 and 2005.