RANKING · 2025 ACS · 56 SHOWN OF 56
Most sparsely populated, Montana counties
Montana counties with the fewest residents per square mile (2023). This list covers the 56 counties in Montana that qualify, ranked against each other statewide.
Flip the list · Most densely populated, US counties →Most sparsely populated by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPPOPULATION DENSITYVS 2000
SHOWING 1–56 OF 56
UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES