Terril is a city in Dickinson County, Iowa, United States.

[4] According to the United States Census Bureau, the city has a total area of 0.55 square miles (1.42 km2), all land.

There were 180 housing units at an average density of 331.7 per square mile (128.1/km2).

There were 178 housing units at an average density of 323.6 per square mile (124.9/km2).

30.5% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older.

There were 186 housing units at an average density of 340.7 per square mile (131.5/km2).

The racial makeup of the city was 99.01% White, 0.25% African American, 0.50% Asian, and 0.25% from two or more races.

32.7% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older.