Falmouth is an unincorporated community and census-designated place (CDP) in Missaukee County in the U.S. state of Michigan. The community is located within Clam Union Township. Its population was 183 at the 2020 census.

It began as a lumbering settlement and was first known as Pinhook. A post office named Falmouth was established on December 18, 1871, with Eugene W. Watson as the first postmaster. In 1873, Falmouth nearly became the county seat, losing to Reeder (now Lake City) by one vote. John Koopman built a store in 1879, and in 1881 bought the village plat, along with its saw, shingle and grist mill.

Falmouth is in southern Missaukee County, in the northwest corner of Clam Union Township. It is 12 miles (19 km) by road southeast of Lake City, the county seat, and 9 miles (14 km) northeast of McBain.

According to the U.S. Census Bureau, the Falmouth CDP has an area of 0.68 square miles (1.76 km), all of if recorded as land. The Clam River, a south-flowing tributary of the Muskegon River, runs along the southwest edge of the community.

The median age of people in Falmouth is 34.1. Falmouth has a larger male population 53% of the population being male, while 47% is female. 90% of the people who in Falmouth are White, with the next most populous ethnicity being the 8% Hispanic population.

Historical population

Census	Pop.	Note	%±
2020	183		—
U.S. Decennial Census

The main roads that provide access to Falmouth are Prosper Road (to the east), 7 Mile Road (to the northeast), Forward Road (to the north and south), and Falmouth Road (to the west.