When was Harper County founded?

Harper County was founded in 1907, formed from Woodward County.

What is the county seat of Harper County?

The county seat of Harper County is Buffalo.

Is there an online parcel map for Harper County?

Yes. Harper County publishes a parcel map of 6,837 parcels, rated official here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Harper County's boundary or name changed?

Harper County was created in 1907 from Woodward 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 Harper County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 40059

Harper CountyOklahoma

Harper County is a county in Oklahoma with its county seat in Buffalo. The county was formed on November 16, 1907.

Founded1907
County seatBuffalo
Land area1,039 sq mi + 2 sq mi water
Population3,272 2020 Census
Parcels mapped6,837 checked 14 October 2026

Open the free map Click any parcel in Harper 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 Woodward County

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

Harper County was created from Woodward County on November 16, 1907.

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

1907
Harper County created Harper created from Woodward.
from Woodward
16 November 1907 · Okla. Constitution [1907], art. 17, sec. 8; Swindler, 8:146

Land and parcels

What the maps cover in Harper

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

Parcels Official

Lot lines and tax-map numbers for 6,837 parcels from Harper 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 Harper 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

Harper by the Census

Population

3,272 2020 Census count

Housing units

1,714 2020 Census count

Land area

1,039 square miles

Water area

2 square miles

People per sq mi

3 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 Harper 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 Harper County

When was Harper County founded?: Harper County was founded in 1907, formed from Woodward County.
What is the county seat of Harper County?: The county seat of Harper County is Buffalo.
Is there an online parcel map for Harper County?: Yes. Harper County publishes a parcel map of 6,837 parcels, rated official here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Harper County's boundary or name changed?: Harper County was created in 1907 from Woodward 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 Harper 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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