There were 649 housing units at an average density of 697.8 per square mile (269.4/km2).

The racial makeup of the city was 98.2% White, 0.2% Asian, and 1.6% from two or more races.

45.4% of all households were made up of individuals, and 31.4% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 99.00% White, 0.36% Native American, 0.27% Asian, and 0.36% from two or more races.

41.7% of all households were made up of individuals, and 29.2% had someone living alone who was 65 years of age or older.

Eureka Municipal Airport is a city-owned, public-use airport located two nautical miles (4 km) north of the central business district of Eureka.