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County tax profile · 2026 · Census ACS + IRS data

Property Tax & Income in Harper County, Oklahoma

Harper County has an effective property tax rate of 0.64%. On the median home value of $99,200, that's roughly $634 per year. Median household income is $64,053.

Effective Property Tax Rate1
0.64%
median tax $634 ÷ median home $99,200
Median Home Value1
$99,200
owner-occupied
Median Household Income1
$64,053
per-capita $30,811
Est. Annual Tax on Median Home1
$634
at 0.64% effective rate

What you'll pay, at a glance

Property taxes are the largest local tax most homeowners pay. The effective rate measures the real tax bill as a share of home value — a more useful number than the nominal “mill rate,” because assessment practices vary county to county.

MetricHarper CountyOklahoma (state context)
Effective property tax rate10.64%0.63%
Median home value1$99,200—
State income tax3top rate 4.75%top rate 4.75%
State sales tax39.06% combined9.06% combined

How this is calculated

The effective property tax rate is the median real-estate tax bill divided by the median home value — both for owner-occupied homes, from the U.S. Census Bureau's American Community Survey (ACS 5-year estimates)1. Median income is also from the ACS1. Federal and state income-tax figures use IRS2 and Tax Foundation3 data.

About Harper County, OK

Harper County’s effective property tax rate of 0.639% sits just above Oklahoma’s statewide median of 0.627%, placing it 35th among the state’s 77 counties. That ranking puts the county near the middle of the pack, with roughly half of Oklahoma counties taxing property at a higher rate and half at a lower one. Against the national median of 0.794%, however, Harper County comes in noticeably lower. The median home value here is $99,200, which yields an annual real-estate tax bill of about $634. With median household income at $64,053 and per-capita income at $30,811, that tax figure amounts to a fairly contained share of household earnings. Buffalo, the county’s largest town, along with Rosston and Freedom, falls under this same rate structure. The overall picture is a county that taxes property somewhat more heavily than the average Oklahoma county but well below what many homeowners elsewhere in the country pay.

Frequently asked questions

What is the property tax rate in Harper County, OK?
The effective rate is 0.64% — meaning the median tax bill equals about 0.64% of the median home value.
How much are property taxes on a median home?
On the median home ($99,200), the estimated annual bill is about $634.
Is Harper County's rate high or low?
Compare it to the state median of 0.63% and the national average near 1.1%.
How does the effective rate differ from my mill rate?
A mill rate is the nominal levy per $1,000 of assessed value. The effective rate reflects what you actually pay after exemptions and assessments — it's the median tax bill as a share of median home value, so it better predicts your real cost.
Will a reassessment raise my tax bill?
Not necessarily. If your home's assessed value rises, your bill can go up, but only if the mill rate and exemptions stay flat. Contact the Harper County assessor's office to review your current assessment.
Can I appeal my property tax assessment?
Yes. Most counties allow an appeal when you believe the assessed value exceeds the market value. File with the Harper County assessor within the local deadline, typically with comparable sales as evidence.
Sources
[1] U.S. Census Bureau — ACS 5-Year (2023) — Median home value (B25077), median real-estate taxes (B25103), median household income (B19013), per-capita income (B19301).
[2] IRS — Statistics of Income — County income, AGI, and real-estate taxes paid.
[3] Tax Foundation — State income, sales, corporate, and estate/inheritance tax rates.