When was Cimarron County founded?

Cimarron County was founded in 1907, formed from Beaver County, and named after Cimarron River.

What is the county seat of Cimarron County?

The county seat of Cimarron County is Boise City.

Is there an online parcel map for Cimarron County?

Yes. Cimarron County publishes a parcel map of 7,105 parcels, rated official here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Cimarron County's boundary or name changed?

Cimarron County was created in 1907 from Beaver County. The Atlas of Historical County Boundaries records no boundary change since.

Is my lot in a flood zone?

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

County · code 40025

Cimarron CountyOklahoma

Cimarron County is a county in Oklahoma, on the border with Colorado, Kansas, New Mexico and Texas, founded in 1907, with its seat at Boise City.

Founded1907
County seatBoise City
Named forCimarron River
Land area1,835 sq mi + 6.2 sq mi water
Population2,296 2020 Census
Parcels mapped7,105 checked 14 October 2026

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

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1907 from Beaver County

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

Cimarron County was named after the Cimarron River.

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

1907
Cimarron County created Cimarron created from Beaver.
from Beaver
16 November 1907 · Okla. Constitution [1907], art. 17, sec. 8; Swindler, 8:143

Land and parcels

What the maps cover in Cimarron

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

Parcels Official

Lot lines and tax-map numbers for 7,105 parcels from Cimarron County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 14 October 2026
Address points Missing

No public address points layer found for Cimarron County yet.
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

Cimarron by the Census

Population

2,296 2020 Census count

Housing units

1,359 2020 Census count

Land area

1,835 square miles

Water area

6.2 square miles

People per sq mi

1 population ÷ land area

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

See your own lot on these maps

Open Cimarron 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 Cimarron County

When was Cimarron County founded?: Cimarron County was founded in 1907, formed from Beaver County, and named after Cimarron River.
What is the county seat of Cimarron County?: The county seat of Cimarron County is Boise City.
Is there an online parcel map for Cimarron County?: Yes. Cimarron County publishes a parcel map of 7,105 parcels, rated official here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Cimarron County's boundary or name changed?: Cimarron County was created in 1907 from Beaver County. The Atlas of Historical County Boundaries records no boundary change since.
Is my lot in a flood zone?: We do not have flood maps for Cimarron County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

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