According to the 2021 census gazetteer files, Country Club Hills has a total area of 4.99 square miles (12.92 km2), of which 4.97 square miles (12.87 km2) (or 99.66%) is land and 0.02 square miles (0.05 km2) (or 0.34%) is water. Country Club Hills is neighbored by Hazel Crest to the east, Flossmoor and Matteson to the south, Oak Forest to the northwest, Markham to the north, and the Cook County Forest Preserves and Tinley Park to the west.