Jewett is a village in Cumberland County, Illinois, United States.

Jewett is located in south-central Cumberland County along the route of the former National Road.

According to the 2010 census, Jewett has a total area of 1 square mile (2.59 km2), all land.

The racial makeup of the village was 94.90% White, 1.53% Native American, and 3.57% from two or more races.

Students in Jewett attend Cumberland Community Unit School District 77.