Oklahoma Sales Tax Rates: Harper County
Harper County, Oklahoma Sales Tax Rate 2026 Up to 9.5%
A county-wide sales tax rate of 2% is applicable to localities in Harper County, in addition to the 4.5% Oklahoma sales tax.
Some cities and local governments in Harper County collect additional local sales taxes, which can be as high as 3%.Here's how Harper County's maximum sales tax rate of 9.5% compares to other counties around the United States:
- Lower maximum sales tax than 77% of Oklahoma counties
- Higher maximum sales tax than 83% of counties nationwide
Tax Rates By City in Harper County, Oklahoma
The total sales tax rate in any given location can be broken down into state, county, city, and special district rates. Oklahoma has a 4.5% sales tax and Harper County collects an additional 2%, so the minimum sales tax rate in Harper County is 6.5% (not including any city or special district taxes). This table shows the total sales tax rates for all cities and towns in Harper County, including all local taxes.
| City | Sales Tax Rate | Tax Jurisdiction |
|---|---|---|
| Buffalo | 9.5% | Buffalo |
| May | 8.5% | May |
| Rosston | 6.5% | Harper |
Oklahoma Sales Tax Rates by Zip Code:
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Harper County, Oklahoma has a maximum sales tax rate of 9.5% and an approximate population of 1,280.
Sales tax rates in Harper County are determined by three different tax jurisdictions, Buffalo, Harper and May.
Back to Oklahoma Sales Tax Handbook Sales tax rates for Harper County are current as of June 2026
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