About This Place
Millville is a census-designated place (CDP) in Shasta County, California, United States. The population was 727 at the 2010 census, up from 610 at the 2000 census.
Millville is located at 40°33′21″N 122°11′7″W / 40.55583°N 122.18528°W / 40.55583; -122.18528 (40.555904, -122.185250).
According to the United States Census Bureau, the CDP has a total area of 8.2 square miles (21.3 km²), 97.96% of it land and 2.04% of it water.