About This Place
Fallon is a census-designated place (CDP) in Prairie County, Montana, United States. The population was 164 at the 2010 census.
Fallon is located at 46°50′8″N 105°7′21″W / 46.83556°N 105.1225°W / 46.83556; -105.1225 (46.835675, -105.122404).
According to the United States Census Bureau, the CDP has a total area of 5.1 square miles (13.1 km²), all of it land.