Lake Hamilton is a town in Polk County, Florida, United States. The population was 1,537 at the 2020 census. It is part of the Lakeland–Winter Haven Metropolitan Statistical Area. The town is named after the lake itself: Lake Hamilton, which is one of the many lakes in the Chain of Lakes. Also, Middle Lake Hamilton and Little Lake Hamilton are located nearby. From 1964 through the 1970s, Hurricane Aircats, military airboats used by the US Army in Vietnam, were manufactured in Lake Hamilton.