According to the United States Census Bureau, the city has a total area of 0.8 square miles (2.1 km2), all land.

Polk City is located within the Central Florida Highlands area of the Atlantic coastal plain, with a terrain consisting of flatland interspersed with gently rolling hills.

[7] As of the 2020 United States census, 2,713 people, 945 households, and 661 families were residing in the city.

[11] As of the 2010 United States census, 1,562 people, 659 households, and 456 families livedin the city.

A yearly Founder's Day festival is held in midtown park located at the beginning of General James A.

[14] The museum closed in April 2014, but was planned to reopen later in a downscaled form.

While small in both size and population, Polk City offers its residents a vast array of activities throughout the year.

The Polk City power grid is supported by distribution lines from Lakeland Electric and TECO.