Egan is a city in Moody County, South Dakota, United States.

[7] According to the United States Census Bureau, the city has a total area of 1.07 square miles (2.77 km2), all land.

30.8% of all households were made up of individuals, and 10.3% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 93.96% White, 4.91% Native American, and 1.13% from two or more races.

34.2% of all households were made up of individuals, and 13.5% had someone living alone who was 65 years of age or older.

About 1.4% of families and 5.7% of the population were below the poverty line, including 2.2% of those under the age of eighteen and 20.0% of those 65 or over.