Avis is a borough in Clinton County, Pennsylvania, United States.

[4] It is on the north side of the valley of the West Branch Susquehanna River, which passes 1 mile (1.6 km) to the south.

According to the United States Census Bureau, Avis has a total area of 0.5 square miles (1.3 km2), all land.

The racial makeup of the borough was 98.73% White, 0.34% African American, 0.60% Asian, and 0.34% from two or more races.

29.7% of all households were made up of individuals, and 17.4% had someone living alone who was 65 years of age or older.