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.

Illinois Route 43 is a 60.30-mile-long (97.04 km) major north–south state highway in the U.S. state of Illinois. It runs from U.S. Route 30 (US 30) in Frankfort north to the large intersection of IL 120 and US 41 in Waukegan.