Dewey County, OklahomaProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- Mid-November 2026; official Dewey County Treasurer schedule says current statements are mailed mid-November, but no specific day is published.
- Payment deadline
- For tax year 2026, taxes first become due November 1, 2026; the full amount or at least one-half is due December 31, 2026; if at least one-half is paid by December 31, the second half is due March 31, 2027; otherwise the full levy becomes delinquent January 1, 2027, with penalties and interest under Oklahoma law.
- Assessment appeal
- For 2026, current Oklahoma Tax Commission Form 974 requires a written protest to the county assessor within 30 calendar days after the valuation notice was mailed; if the value was unchanged from the prior year, a protest may be filed by the first Monday in April. An appeal of the assessor decision uses OTC Form 976 and is due within 15 calendar days after the decision is mailed; proceedings must be completed by May 31 or the county Board of Equalization adjournment date.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
For tax year 2026, current Oklahoma Tax Commission Form 921 must be filed with the county assessor by March 15, 2026, or within 30 days after receipt of a notice of valuation increase; a new owner must apply, while a continuing qualified owner generally need not reapply.
Senior relief
2026 Oklahoma Tax Commission Form 994: a head of household age 65 or older as of January 1 who owns and occupies the homestead on January 1 and whose gross household income is within the preceding year's HUD county income threshold may receive the property-valuation limitation. The additional homestead exemption requires age 65 or older as of March 15 and household income of $30,000 or less. File with the county assessor by March 15, or within 30 days after a valuation-increase notice; Form 994 is the official application.
Valuation limits
Oklahoma Constitution Article X §8B limits annual increases in fair cash value of locally assessed real property to 5%; property qualifying for homestead exemption or classified as agricultural is limited to 3%. The limits generally do not apply in a year of title transfer/change/conveyance or to value added by improvements; personal property and state-assessed property are excluded. The separate senior valuation limitation is under Article X §8C and OTC Form 994.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.