Grantfork is a village in Madison County, Illinois, United States.

[4] Illinois Route 160 passes through the west side of the village, leading south 6 miles (10 km) to Highland and north 4 miles (6 km) to Illinois Route 140.

The racial makeup of the village was 99.21% White, 0.39% Native American, and 0.39% from two or more races.

29.7% of all households were made up of individuals, and 8.9% had someone living alone who was 65 years of age or older.

About 3.1% of families and 4.4% of the population were below the poverty line, including none of those under the age of eighteen or sixty five or over.