Rolette County area

Rolette County, North Dakota covers 939.5 square miles: 903 square miles of land and 36.5 square miles of water. Its county seat is Rolla. An estimated 11,688 people lived there in 2025.

Official Census measurements · GEOID 380792026 Gazetteer · retrieved September 27, 2026
Land area903 mi²
Water area36.5 mi²
Population (2025)11,688
People per mi²13

County outline

Generalized outline of Rolette County, North Dakota
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Rolette County is located

Rolette County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 96.1% of Rolette County’s measured area and water for 3.9%. Its combined area converts to 2,433.3 square kilometers or approximately 601,279 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land903.0422,338.868577,946.9
Water36.45794.42323,332.5
Total939.4992,433.291601,279.4

How Rolette County compares

By original Census land area, Rolette County ranks #44 of 53 in North Dakota and #840 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 0.777 times the North Dakota county-equivalent median of 1,161.8 square miles. It accounts for 1.3% of the combined county land area in the state.

See the complete North Dakota ranking · What counts as a county equivalent?

Population and density of Rolette County

The Census Bureau estimates that 11,688 people lived in Rolette County on July 1, 2025. That ranks #2,377 of 3,222 county equivalents nationally and #11 of 53 in North Dakota. Since the April 1, 2020 estimates base of 12,188, the population has declined by 500 (−4.1%), compared with +2.6% for North Dakota as a whole.

With 903 square miles of land, that is 13 people per square mile (5 per km²), placing Rolette County #2,542 nationally for density and #8 in North Dakota. The median county equivalent has 47 people per square mile; the North Dakota median is 3.7. Put another way, there are about 49 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate12,18512,04011,84611,70511,66411,688
Change—−145−194−141−41+24

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 Rolette County

5 incorporated places lie at least partly in Rolette County. Together they are home to 2,553 people (21.8%); the other 9,135 (78.2%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Rolla city, with 1,156 residents in the county.

Incorporated placePopulation 2025Since 2020Land mi²
Rolla cityCounty seat1,156−5%1.461
Dunseith city606−4.9%1.002
Rolette city462−4.5%1.008
St. John city310−4%0.442
Mylo city19−5%0.862

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Rolette County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Rolette 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

11 ZIP Code Tabulation Areas have land in Rolette County; 7 of them have most of their land inside the county, and the others mainly cover neighboring areas.

5831058316583175832958353583635836658367583695838458385

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 Rolette County

Rolette County shares a land border with 3 county equivalents. Each of them has more land than Rolette County. The largest neighbor is Bottineau County (1,668.9 mi²) and the smallest is Pierce County (1,018.3 mi²). Together with its neighbors, Rolette County forms a block of 4,615.3 mi² of land, of which it holds 19.6%.

Map of Rolette County and the 3 county equivalents that border it Bottineau County, North Dakota: 1,668.9 mi² landTowner County, North Dakota: 1,025.1 mi² landPierce County, North Dakota: 1,018.3 mi² land
Rolette County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. RoletteCompare
Bottineau County1,668.91.8× largerCompare
Towner County1,025.11.1× largerCompare
Pierce County1,018.31.1× largerCompare

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

Rolette County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.1 times as much. North Dakota’s county land could hold about 76 areas the size of Rolette County.

Land area: Rolette County and the closest-sized states
Rolette County903 mi²
Rhode Island1,033.9 mi²

Another way to picture it: the same land area would fill a square about 30.1 miles (48.4 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 Rolette County?

Rolette County has more land than 2,382 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Rolette County903 mi²
North Dakota median1,161.8 mi²
National median604.5 mi²

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 Rolette County at #862 nationally by total area, 22 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 3.9%, compared with a national county-equivalent median of 1.2% — 2.7 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 Rolette County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#839Orange County, Florida903Compare
#840Rolette County, North Dakota903This county
#841Kent County, Texas902.5Compare

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 48.768271, -99.840463. 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: 2,338,867,323 m²; AWATER: 94,423,047 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Rolette County?

Rolette County, North Dakota has 903 square miles (2,338.9 km²) of land and 36.5 square miles of water, for a total area of 939.5 square miles. It ranks #840 of 3,222 U.S. county equivalents by land area.

Is Rolette County the largest county in North Dakota?

No. Rolette County ranks #44 of 53 in North Dakota by land area. The largest is McKenzie County, with 2,760.1 square miles of land.

What counties border Rolette County?

Rolette County shares a land border with Bottineau County, Towner County, and Pierce County.

What is the population of Rolette County?

The Census Bureau estimates Rolette County had 11,688 residents on July 1, 2025, ranking #2,377 of 3,222 county equivalents. That is 13 people per square mile of land.

What is the county seat of Rolette County?

The county seat of Rolette County is Rolla.

What cities and towns are in Rolette County?

Rolette County has 5 incorporated places. The most populous are Rolla city, Dunseith city, Rolette city, St. John city, and Mylo city; 9,135 residents live outside any incorporated place.

Is Rolette County part of a metropolitan area?

No. Rolette County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.

How many ZIP codes are in Rolette County?

11 ZIP Code Tabulation Areas have land in Rolette County, and 7 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Rolette County compare with U.S. states?

It has less land than every state. Rhode Island, the smallest, has 1.1 times as much land.

How many acres of land are in Rolette County?

The land measurement converts to approximately 577,947 acres. Including water, total area is approximately 601,279 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.

Cite this county

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