Broadwater County area

Population and density of Broadwater County

The Census Bureau estimates that 8,493 people lived in Broadwater County on July 1, 2025. That ranks #2,612 of 3,222 county equivalents nationally and #27 of 56 in Montana. Since the April 1, 2020 estimates base of 6,775, the population has grown by 1,718 (+25.4%), compared with +5.6% for Montana as a whole.

With 1,192.4 square miles of land, that is 7.1 people per square mile (2.8 per km²), placing Broadwater County #2,761 nationally for density and #12 in Montana. The median county equivalent has 47 people per square mile; the Montana median is 2.8. Put another way, there are about 90 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Broadwater County

1 incorporated place lies at least partly in Broadwater County. Together they are home to 2,272 people (26.8%); the other 6,221 (73.2%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Townsend city, with 2,272 residents in the county.

Metropolitan area

Broadwater County is an outlying county of the Helena, MT Metropolitan Statistical Area. Its 3 county equivalents have 97,153 residents on 6,307.7 square miles of land; Broadwater County accounts for 18.9% of the land and 8.7% of the residents. By combined land it ranks #30 of 393 metropolitan areas, and #374 by population.

ZIP codes

6 ZIP Code Tabulation Areas have land in Broadwater County; 3 of them have most of their land inside the county, and the others mainly cover neighboring areas.

596355964359644596455964759752

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Broadwater County

Broadwater County shares a land border with 4 county equivalents. Each of them has more land than Broadwater County. The largest neighbor is Lewis and Clark County (3,458.4 mi²) and the smallest is Jefferson County (1,657 mi²). Together with its neighbors, Broadwater County forms a block of 11,305 mi² of land, of which it holds 10.5%.

How big is Broadwater County compared with U.S. states?

Broadwater County has more land than 1 of the 50 states. It is about 1.2 times the land area of Rhode Island (1,033.9 mi²), while Delaware, the next larger state, has 1.6 times as much land (1,948.6 mi²). Montana’s county land could hold about 122 areas the size of Broadwater County.

Another way to picture it: the same land area would fill a square about 34.5 miles (55.6 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Broadwater County?

Broadwater County has more land than 2,708 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Broadwater County at #567 nationally by total area, 53 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 3.7%, compared with a national county-equivalent median of 1.2% — 2.5 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Broadwater County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.