Willow Oak is a census-designated place (CDP) in western Polk County, Florida, United States. As of the 2020 census, Willow Oak had a population of 6,806. It is part of the Lakeland–Winter Haven Metropolitan Statistical Area.

Geography

According to the United States Census Bureau, the CDP has a total area of , all land.

Demographics

2020 census

As of the 2020 census, Willow Oak had a population of 6,806. The median age was 31.8 years. 29.7% of residents were under the age of 18 and 10.2% of residents were 65 years of age or older. For every 100 females there were 104.0 males, and for every 100 females age 18 and over there were 101.3 males age 18 and over.

100.0% of residents lived in urban areas, while 0.0% lived in rural areas.

There were 2,214 households in Willow Oak, of which 41.1% had children under the age of 18 living in them. Of all households, 48.6% were married-couple households, 18.2% were households with a male householder and no spouse or partner present, and 22.8% were households with a female householder and no spouse or partner present. About 19.7% of all households were made up of individuals and 7.2% had someone living alone who was 65 years of age or older.