Barry is a city in Pike County, Illinois, United States.

According to the 2010 census, Barry has a total area of 1.41 square miles (3.65 km2), all land.

There were 623 housing units at an average density of 545.6 per square mile (210.7/km2).

The racial makeup of the city was 99.42% White, 0.44% Asian, and 0.15% from two or more races.

32.4% of all households were made up of individuals, and 20.3% had someone living alone who was 65 years of age or older.