Kathleen is a census-designated place (CDP) in Polk County, Florida, United States.

[6] According to the United States Census Bureau, the CDP has a total area of 3.3 square miles (8.5 km2), all land.

As of the census[2] of 2000, there were 3,280 people, 1,162 households, and 900 families residing in the CDP.

There were 1,250 housing units at an average density of 375.9 per square mile (145.1/km2).

17.7% of all households were made up of individuals, and 6.1% had someone living alone who was 65 years of age or older.