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Demographics & People — Rimrock Colony, Montana
Population Overview
Population (Census) 157
Estimated 2026 ~0
Median Age 28.2
Total Households 15
Family Households 15
Average Household Size 7.53
Diversity Index 0.0 (relatively homogeneous)
Race & Ethnicity
White 131
Black or African American 0
Asian 0
Hispanic or Latino 0
Heritage & Ancestry
Group Count
Unclassified or not reported 84
German 24
Canadian 20
Pennsylvania German 20
Russian 12
Language
English Only 101
Spanish 0
Population 5+ 132
Veterans
Veterans 2
Population 18+ 62
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013 (county fallback). Data for Rimrock Colony, Montana.