About This Place
West Alton is a city in St. Charles County, Missouri, United States. The population was 573 at the 2000 census.
West Alton is located at 38°52′4″N 90°13′33″W / 38.86778°N 90.22583°W / 38.86778; -90.22583 (38.867798, -90.225856).
According to the United States Census Bureau, the city has a total area of 36.9 square miles (95.6 km²), of which, 28.4 square miles (73.5 km²) of it is land and 8.6 square miles (22.2 km²) of it (23.18%) is water.