Masonville is an unincorporated community and a U.S. Post Office in Larimer County, Colorado, United States.

The Masonville Post Office has the ZIP Code 80541.

[2] Masonville is located at 40°29′14″N 105°12′36″W / 40.48722°N 105.21000°W / 40.48722; -105.21000 (40.487171,-105.210056).