Kathleen is a census-designated place located in the U.S. state of Florida. It is within Polk County included in the Lakeland–Winter Haven Metropolitan Statistical Area. It has a total area of 3.3 square miles at 28°7′17″N 82°1′35″W. The elevation is 144 feet above sea level. As of the 2000 census data, it had a total population of 3,280. The population density was 993.9/sq mi. Estimated per capita income in 2016 was $18,178. Recent job growth is positively increased by 1.30 percent. The average travel time is 29 minutes. It has Zip code 33849.