Mount Prospect URL: https://knowledge.ivjn.us/en/places/il-mount-prospect.html Mount Prospect is a city in Illinois, United States. ## Overview Mount Prospect is a city in [Illinois](https://knowledge.ivjn.us/en/places/illinois.html), United States, with a population of about 54,747[^geonames]. ## Geography - Coordinates: 42.0664, -87.9373 Updated: 2026-10-29 Relations: - Located in: Cook County https://knowledge.ivjn.us/en/places/il-cook-county.html Sources: - GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip