All 77 Oklahoma counties and county equivalents. 2 have been checked against the county's own schedule; the rest follow the state schedule below.
| Instalment | Due | Notes |
|---|---|---|
| First half | January 2, 2027 | Taxes are due and payable November 1, but at least half must be paid before January 1 or the entire bill becomes delinquent. |
| Second half | April 2, 2027 | Remaining half must be paid before April 1 or that portion becomes delinquent. |
Oklahoma property tax is billed and collected county by county, so the collector — not the state — issues the bill. All 77 counties use the November 1 due date with half due by January 1 and the balance by April 1; the first half can slip later only where the roll is certified late.
CountyTaxDates is an independent reference and is not a government agency. Deadlines change and exceptions apply — always confirm with your county treasurer using the official link on this page. Nothing here is tax, legal or financial advice.