Demographics & People — Lewis and Clark County, Montana

Population & Households

Population (official)71,487
Median Age41.20
Veterans6,011
Housing Units33,589
Uninsured654

Migration

Inflow71,888
Outflow70,989
Net899
GrowingYes
Year2022-2023

Source: Census ACS 5-Year 2022. Official numbers: Census ACS 5-Year 2022 — county-level query.

Data provenance: aggregated from town-level sources, county.json. Rebuilt 2026-04-13T15:43:29.013194+00:00; aggregated 2026-04-13T16:08:24.180806+00:00.