Hales Grove (formerly, Monroe and Monroeville) is an

unincorporated community An unincorporated area is a region that is not governed by a local municipal corporation. Widespread unincorporated communities and areas are a distinguishing feature of the United States and Canada. Most other countries of the world either have ...

Mendocino County Mendocino County (; ''Mendocino'', Spanish for "of Mendoza) is a county located on the North Coast of the U.S. state of California. As of the 2020 census, the population was 91,601. The county seat is Ukiah. Mendocino County consists whol ...

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

. It is located on California State Route 1DeLorme ''California Atlas & Gazetteer'' (2008) Yarmouth, Maine p.47 adjacent to the South Fork of Mule Creek south of Piercy, at an elevation of 1138 feet (347 m). The Monroe post office opened in 1897, and after several moves closed in 1912.

References

Unincorporated communities in California Unincorporated communities in Mendocino County, California {{MendocinoCountyCA-geo-stub