Demographics & People — Interior, South Dakota

Population Overview

Population (Census)	53
Estimated 2026	~200
Median Age	46.1
Total Households	26
Family Households	10
Average Household Size	2.04
Diversity Index	N/A (N/A)

Race & Ethnicity

White	45
Black or African American	0
Asian	0
Hispanic or Latino	0

Heritage & Ancestry

Group	Count
German	30
Irish	17
Other groups	10
English	7
Scottish	7

Language

English Only	53
Spanish	0
Population 5+	53

Veterans

Veterans	7
Population 18+	52

Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013 (county fallback). Data for Interior, South Dakota.