Palatine is a village in Cook County, Illinois, United States. It is a northwestern residential suburb of Chicago. As of the 2000 census, the village had a total population of 65,479, making it the sixth-largest community in Cook County and the 16th-largest in the state of Illinois at that time. In 2005 its population was estimated to be 67,232.
Palatine is located at 42°7′1″N 88°2′26″W / 42.11694°N 88.04056°W / 42.11694; -88.04056 (42.116885, -88.040613).
According to the United States Census Bureau, the village has a total area of 13.1 square miles (34.0 km²), of which, 13.0 square miles (33.6 km²) of it is land and 0.1 square miles (0.3 km²) of it (0.99%) is water. Palatine's shape resembles that of the head of an axe.