Crook County area

Crook County, Oregon covers 2,987 square miles: 2,978.9 square miles of land and 8.106 square miles of water. Its county seat is Prineville. An estimated 27,564 people lived there in 2025.

Official Census measurements · GEOID 410132026 Gazetteer · retrieved September 27, 2026
Land area2,978.9 mi²
Water area8.106 mi²
Population (2025)27,564
People per mi²9.3

County outline

Generalized outline of Crook County, Oregon
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 Crook County is located

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

Area breakdown

Land accounts for 99.7% of Crook County’s measured area and water for 0.3%. Its combined area converts to 7,736.4 square kilometers or approximately 1,911,705 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land2,978.9337,715.4011,906,517.1
Water8.10620.9945,187.8
Total2,987.0397,736.3951,911,705

How Crook County compares

By original Census land area, Crook County ranks #12 of 36 in Oregon and #173 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 1.631 times the Oregon county-equivalent median of 1,826.2 square miles. It accounts for 3.1% of the combined county land area in the state.

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

Population and density of Crook County

The Census Bureau estimates that 27,564 people lived in Crook County on July 1, 2025. That ranks #1,569 of 3,222 county equivalents nationally and #21 of 36 in Oregon. Since the April 1, 2020 estimates base of 24,739, the population has grown by 2,825 (+11.4%), compared with +0.9% for Oregon as a whole.

With 2,978.9 square miles of land, that is 9.3 people per square mile (3.6 per km²), placing Crook County #2,667 nationally for density and #26 in Oregon. The median county equivalent has 47 people per square mile; the Oregon median is 25. Put another way, there are about 69 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate24,93325,77226,39326,94027,32027,564
Change—+839+621+547+380+244

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 Crook County

1 incorporated place lies at least partly in Crook County. Together they are home to 11,994 people (43.5%); the other 15,570 (56.5%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Prineville city, with 11,994 residents in the county.

Metropolitan area

Crook County is an outlying county of the Bend, OR Metropolitan Statistical Area. Its 3 county equivalents have 266,376 residents on 7,778.2 square miles of land; Crook County accounts for 38.3% of the land and 10.3% of the residents. By combined land it ranks #22 of 393 metropolitan areas, and #191 by population.

County equivalentPopulation 2025Land mi²
Deschutes County213,0723,017.6
Crook County27,5642,978.9
Jefferson County25,7401,781.7

ZIP codes

7 ZIP Code Tabulation Areas have land in Crook County; 4 of them have most of their land inside the county, and the others mainly cover neighboring areas.

97701977519775297753977549775697760

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 Crook County

Crook County shares a land border with 5 county equivalents. It has more land than 2 of them. The largest neighbor is Harney County (10,134.5 mi²) and the smallest is Wheeler County (1,716 mi²). Together with its neighbors, Crook County forms a block of 24,156.5 mi² of land, of which it holds 12.3%.

Map of Crook County and the 5 county equivalents that border it Deschutes County, Oregon: 3,017.6 mi² landWheeler County, Oregon: 1,716 mi² landJefferson County, Oregon: 1,781.7 mi² landHarney County, Oregon: 10,134.5 mi² landGrant County, Oregon: 4,527.8 mi² land
Crook 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. CrookCompare
Harney County10,134.53.4× largerCompare
Grant County4,527.81.5× largerCompare
Deschutes County3,017.6about the sameCompare
Jefferson County1,781.71.7× smallerCompare
Wheeler County1,7161.7× smallerCompare

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

Crook County has more land than 2 of the 50 states. It is about 1.5 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.6 times as much land (4,842.5 mi²). Oregon’s county land could hold about 32 areas the size of Crook County.

Land area: Crook County and the closest-sized states
Delaware1,948.6 mi²
Crook County2,978.9 mi²
Connecticut4,842.5 mi²

Another way to picture it: the same land area would fill a square about 54.6 miles (87.8 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 Crook County?

Crook County has more land than 3,049 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Crook County2,978.9 mi²
Oregon median1,826.2 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 Crook County at #188 nationally by total area, 15 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 0.3%, compared with a national county-equivalent median of 1.2% — 0.9 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 Crook County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#172Glacier County, Montana2,995.2Compare
#173Crook County, Oregon2,978.9This county
#174Luna County, New Mexico2,965.2Compare

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 44.163054, -120.371585. 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: 7,715,399,810 m²; AWATER: 20,995,585 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 Crook County?

Crook County, Oregon has 2,978.9 square miles (7,715.4 km²) of land and 8.106 square miles of water, for a total area of 2,987 square miles. It ranks #173 of 3,222 U.S. county equivalents by land area.

Is Crook County the largest county in Oregon?

No. Crook County ranks #12 of 36 in Oregon by land area. The largest is Harney County, with 10,134.5 square miles of land.

What counties border Crook County?

Crook County shares a land border with Deschutes County, Wheeler County, Jefferson County, Harney County, and Grant County.

What is the population of Crook County?

The Census Bureau estimates Crook County had 27,564 residents on July 1, 2025, ranking #1,569 of 3,222 county equivalents. That is 9.3 people per square mile of land.

What is the county seat of Crook County?

The county seat of Crook County is Prineville.

Is Crook County part of a metropolitan area?

Yes. It is an outlying county of the Bend, OR Metropolitan Statistical Area, which has 3 county equivalents and 266,376 residents.

How many ZIP codes are in Crook County?

7 ZIP Code Tabulation Areas have land in Crook 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 Crook 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 Crook County?

The land measurement converts to approximately 1,906,517 acres. Including water, total area is approximately 1,911,705 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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