Third Lake URL: https://knowledge.ivjn.us/en/places/il-third-lake.html Third Lake is a town in Illinois, United States. ## Overview Third Lake is a town in [Illinois](https://knowledge.ivjn.us/en/places/illinois.html), United States, with a population of about 1,189[^geonames]. ## Geography - Coordinates: 42.3739, -88.0109 Updated: 2026-10-29 Relations: - Located in: Lake County https://knowledge.ivjn.us/en/places/il-lake-county.html Sources: - GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip