West Farmington is a village in northwestern Trumbull County, Ohio, United States, along the Grand River.

According to the United States Census Bureau, the village has a total area of 0.88 square miles (2.28 km2), all land.

There were 201 housing units at an average density of 228.4 per square mile (88.2/km2).

The racial makeup of the village was 98.8% White, 0.4% Native American, and 0.8% from two or more races.

19.3% of all households were made up of individuals, and 5.9% had someone living alone who was 65 years of age or older.

24.5% of all households were made up of individuals, and 8.0% had someone living alone who was 65 years of age or older.