Ottawa URL: https://knowledge.ivjn.us/en/places/il-ottawa.html Ottawa is a city in Illinois, United States. ## Overview Ottawa is a city in [Illinois](https://knowledge.ivjn.us/en/places/illinois.html), United States, with a population of about 18,342[^geonames]. ## Geography - Coordinates: 41.3456, -88.8426 Updated: 2026-10-29 Relations: - Located in: LaSalle County https://knowledge.ivjn.us/en/places/il-lasalle-county.html Sources: - GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip