Lynnville is a village in Morgan County, Illinois, United States.

Interstate 72 and U.S. Route 36 pass 1⁄2 mile (0.80 km) south of the village, but with no direct access.

According to the U.S. Census Bureau, Lynnville has a total area of 0.08 square miles (0.21 km2), all land.

25.5% of all households were made up of individuals, and 14.5% had someone living alone who was 65 years of age or older.

There were none of the families and 1.4% of the population living below the poverty line, including no under eighteens and none of those over 64.