County outline
Where Dawson County is located
Area breakdown
Land accounts for 99.5% of Dawson County’s measured area and water for 0.5%. Its combined area converts to 6,173.1 square kilometers or approximately 1,525,417 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 2,371.926 | 6,143.26 | 1,518,032.6 |
| Water | 11.538 | 29.883 | 7,384.3 |
| Total | 2,383.464 | 6,173.143 | 1,525,417 |
How Dawson County compares
By original Census land area, Dawson County ranks #28 of 56 in Montana and #233 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.004 times the Montana county-equivalent median of 2,363.3 square miles. It accounts for 1.6% of the combined county land area in the state.
See the complete Montana ranking · What counts as a county equivalent?
Population and density of Dawson County
The Census Bureau estimates that 8,692 people lived in Dawson County on July 1, 2025. That ranks #2,590 of 3,222 county equivalents nationally and #26 of 56 in Montana. Since the April 1, 2020 estimates base of 8,941, the population has declined by 249 (−2.8%), compared with +5.6% for Montana as a whole.
With 2,371.9 square miles of land, that is 3.7 people per square mile (1.4 per km²), placing Dawson County #2,936 nationally for density and #24 in Montana. The median county equivalent has 47 people per square mile; the Montana median is 2.8. Put another way, there are about 175 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 8,921 | 8,855 | 8,796 | 8,825 | 8,739 | 8,692 |
| Change | — | −66 | −59 | +29 | −86 | −47 |
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 Dawson County
2 incorporated places lie at least partly in Dawson County. Together they are home to 4,896 people (56.3%); the other 3,796 (43.7%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Glendive city, with 4,736 residents in the county.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Glendive cityCounty seat | 4,736 | −2.9% | 3.474 |
| Richey town | 160 | −3% | 0.258 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Dawson County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Dawson County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.
ZIP codes
8 ZIP Code Tabulation Areas have land in Dawson County; 4 of them have most of their land inside the county, and the others mainly cover neighboring areas.
5921559259592625931559326593305933959353
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 Dawson County
Dawson County shares a land border with 4 county equivalents. It has more land than 3 of them. The largest neighbor is McCone County (2,642.2 mi²) and the smallest is Wibaux County (889.6 mi²). Together with its neighbors, Dawson County forms a block of 9,724.9 mi² of land, of which it holds 24.4%.
| Bordering county equivalent | Land mi² | Size vs. Dawson | Compare |
|---|---|---|---|
| McCone County | 2,642.2 | 1.1× larger | Compare |
| Richland County | 2,084.6 | 1.1× smaller | Compare |
| Prairie County | 1,736.6 | 1.4× smaller | Compare |
| Wibaux County | 889.6 | 2.7× smaller | Compare |
How big is Dawson County compared with U.S. states?
Dawson County has more land than 2 of the 50 states. It is about 1.2 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 2 times as much land (4,842.5 mi²). Montana’s county land could hold about 61 areas the size of Dawson County.
Another way to picture it: the same land area would fill a square about 48.7 miles (78.4 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 Dawson County?
Dawson County has more land than 2,989 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 Dawson County at #252 nationally by total area, 19 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 0.5%, compared with a national county-equivalent median of 1.2% — 0.7 percentage points lower. 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 Dawson County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #232 | Wasco County, Oregon | 2,381.1 | Compare |
| #233 | Dawson County, Montana | 2,371.9 | This county |
| #234 | Yuma County, Colorado | 2,364.4 | Compare |
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.
Representative coordinates
The Census internal point is 47.266130, -104.898271. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 6,143,260,025 m²; AWATER: 29,884,264 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Dawson County?
Dawson County, Montana has 2,371.9 square miles (6,143.3 km²) of land and 11.5 square miles of water, for a total area of 2,383.5 square miles. It ranks #233 of 3,222 U.S. county equivalents by land area.
Is Dawson County the largest county in Montana?
No. Dawson County ranks #28 of 56 in Montana by land area. The largest is Beaverhead County, with 5,542.7 square miles of land.
What counties border Dawson County?
Dawson County shares a land border with Richland County, Prairie County, McCone County, and Wibaux County.
What is the population of Dawson County?
The Census Bureau estimates Dawson County had 8,692 residents on July 1, 2025, ranking #2,590 of 3,222 county equivalents. That is 3.7 people per square mile of land.
What is the county seat of Dawson County?
The county seat of Dawson County is Glendive.
What cities and towns are in Dawson County?
Dawson County has 2 incorporated places. The most populous are Glendive city and Richey town; 3,796 residents live outside any incorporated place.
Is Dawson County part of a metropolitan area?
No. Dawson County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Dawson County?
8 ZIP Code Tabulation Areas have land in Dawson County, and 4 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Dawson County compare with U.S. states?
It has more land than 2 of the 50 states, including Delaware (1,948.6 square miles of land).
How many acres of land are in Dawson County?
The land measurement converts to approximately 1,518,033 acres. Including water, total area is approximately 1,525,417 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.