When was Crook County founded?

Crook County was founded in 1882, formed from Wasco County, and named after George Crook.

What is the county seat of Crook County?

The county seat of Crook County is Prineville.

Is there an online parcel map for Crook County?

Yes. Crook County publishes a parcel map of 17,596 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Crook County's boundary or name changed?

Crook County was created in 1882 from Wasco County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Wheeler County, Deschutes County and Gilliam County.

Is my lot in a flood zone?

We do not have flood maps for Crook County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 41013

Crook CountyOregon

Crook County is located in Oregon and was created in 1882 from Wasco County, with its county seat in Prineville. The county was named after George Crook.

Founded1882
County seatPrineville
Named forGeorge Crook
Land area2,979 sq mi + 8.1 sq mi water
Population24,738 2020 Census
Parcels mapped17,596 checked 15 October 2026

Open the free map Click any parcel in Crook County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1882 from Wasco County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Crook County was created from Wasco County on October 24, 1882. Crook County gained territory from Grant County in 1885, and gained a small area along the John Day River from Gilliam County in 1899 before losing it back to Gilliam in 1901. The county lost territory with the creation of Wheeler County in 1899, and further lost land to the creation of Jefferson County in 1914 and Deschutes County in 1917.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

1882
Crook County created Crook created from Wasco.
from Wasco
24 October 1882 · Ore. Special Laws 1882, 12th reg. sess., p. 178
1885
Gained territory Crook gained from Grant.
from Grant
23 February 1885 · Ore. Special Laws 1885, 13th reg. sess., pp. 302-303
1899
Gained territory Crook gained a small area along the John Day River from Gilliam; lost to creation of Wheeler.
from Gilliam from Wheeler
17 February 1899 · Ore. Laws 1899, 20th reg. sess., pp. 51-55
1901
Lost territory Crook lost small area along the John Day River to Wheeler.
to Wheeler
27 February 1901 · Ore. Laws 1901, 21st reg. sess., pp. 291-292
1914
Lost territory Crook lost to creation of Jefferson.
to Jefferson
12 December 1914 · Ore. Laws 1915, gen., 28th reg. sess., Gov. Proc., pp. 9-10
1917
Lost territory Crook lost to creation of Deschutes.
to Deschutes
1 February 1917 · Ore. Laws 1917, gen., 29th reg. sess., gov. proc./pp. 5-6; ch. 41/pp. 57-61
1927
Boundary clarified Crook boundaries redefined (no change).
no change
9 February 1927 · Ore. Laws 1927, gen., 34th reg. sess., ch. 48/pp. 57-58

Land and parcels

What the maps cover in Crook

Who publishes each layer, how good it is, and when we last checked.

Parcels Good enough

Lot lines and tax-map numbers for 17,596 parcels from Crook County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026
Address points Official

One point per address, 14,099 in all from State of Oregon — Department of Administrative Services Geospatial Enterprise Office (GEOHub) with Oregon Department of Emergency Management 9-1-1 program.
edited 16 January 2026 · checked 13 October 2026
Buildings Reference

Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026

Official: from the office that keeps the record
Good enough: a reliable statewide or national copy
Fallback: a guide only; check the official record
Missing: nothing public found yet

People and land

Crook by the Census

Population

24,738 2020 Census count

Housing units

11,159 2020 Census count

Land area

2,979 square miles

Water area

8.1 square miles

People per sq mi

8 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Crook County's official site

We have found the county's site but not its offices yet; start there.

County government

County government
The official website of Crook County.
co.crook.or.us

See your own lot on these maps

Open Crook County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

Open the free map no sign-in Pro early access

Questions

Common questions about Crook County

When was Crook County founded?: Crook County was founded in 1882, formed from Wasco County, and named after George Crook.
What is the county seat of Crook County?: The county seat of Crook County is Prineville.
Is there an online parcel map for Crook County?: Yes. Crook County publishes a parcel map of 17,596 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Crook County's boundary or name changed?: Crook County was created in 1882 from Wasco County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Wheeler County, Deschutes County and Gilliam County.
Is my lot in a flood zone?: We do not have flood maps for Crook County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby