Catherine is a cdp located in Lake County, in the state of Illinois (IL), United States. Nestled in the East North Central division of the Midwest region, it covers an area of 1.1 square miles (3.0 km²) and sits at an elevation of 750 ft. With a population of approximately 1,490 residents, Catherine offers a peaceful, rural atmosphere.
The town's population is composed of about 51.54% males and 48.46% females, and it has a population density of 405.66 people per square mile (542.73/km²). Catherine lies at a latitude of 42.48 and a longitude of -88.12, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (0%), followed by English (10.5%), German (27.1%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 60002.