Palos Heights is a city in Cook County, Illinois, United States. It is a southwest suburb of Chicago. Per the 2020 census, the population w…Palos Heights is a city in Cook County, Illinois, United States. It is a southwest suburb of Chicago. Per the 2020 census, the population was 12,068. According to the 2021 census gazetteer files, Palos Heights has a total area of 3.87 square miles, of which 3.77 square miles is land and 0.10 square miles is water.
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