Grass Valley URL: https://knowledge.ivjn.us/en/places/ca-grass-valley.html Grass Valley is a city in California, United States. ## Overview Grass Valley is a city in [California](https://knowledge.ivjn.us/en/places/california.html), United States, with a population of about 12,944[^geonames]. ## Geography - Coordinates: 39.2191, -121.0611 Updated: 2026-10-29 Relations: - Located in: Nevada County https://knowledge.ivjn.us/en/places/ca-nevada-county.html Sources: - GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip