Health insurance in Oklahoma

Reviewed September 4, 2026 · 2026 federal data

Source: CMS Marketplace Open Enrollment Public Use Files and US Census Small Area Health Insurance Estimates, 2026 release. Figures cover the under-65 population.

Where you enroll

Oklahoma is one of 2 states running a state-based marketplace using the federal platform: the state governs its own exchange but operates it on the federal platform, so you still enroll at HealthCare.gov and still face the federal dates.

Medicaid covers the bottom of the range in Oklahoma

Oklahoma expanded Medicaid, so there is no coverage gap here: adults under 138% of the poverty guideline — about $22,025 for one person — go to Medicaid rather than falling between it and the subsidy.

475,968 under-65 Oklahoma residents are uninsured all the same, 14.4% of them — 2nd of the 51 states and DC, and 1.4× the 26-state median of 9.9%.

Oklahoma is several markets, not one

Oklahoma is not one market. Its counties range from 1 insurer to 7 — a gap of 6. Someone at one end of the state is shopping in a genuinely different market from someone at the other, at the same age and the same income.

5 counties in Oklahoma have just one insurer selling on the exchange. In those, comparison shopping is not really available and the benchmark plan is whatever the single company filed. No county in Oklahoma changed its number of insurers since the previous plan year.

How many Oklahoma residents buy on the marketplace

261,887 Oklahoma residents selected a marketplace plan for 2026. Against the state's under-65 population that is 79 per thousand, close to the 26-state median of 79, and 13th highest of the 26 states on this site.

Of those, 33,769 — 13% — were new rather than renewing, which is a fairly typical mix of new and renewing enrollees (21st of 26).

The spread inside Oklahoma

Oklahoma County is the largest county we publish here, with 685,111 under-65 residents; Comanche County is the smallest, with 95,217. Oklahoma County has 7 insurers offering 103 plans, and Comanche County has 4 offering 48.

The widest choice in Oklahoma is in Oklahoma County — 7 insurers, 103 plans. The narrowest is Comanche County, with 4 insurers and 48 plans. Same state, same rules, 55 more plans to choose from.

Uninsured rates range from 11.2% in Canadian County to 15.2% in Oklahoma County — 1.4 times as high, within one state.

The 5 largest counties in Oklahoma

By under-65 population, covering 53% of the state's under-65 residents. Oklahoma has 77 counties with complete federal data; we publish pages for the largest.

Source: CMS Marketplace Open Enrollment Public Use Files and US Census Small Area Health Insurance Estimates, 2026 release. "Per 1,000" is marketplace plan selections per thousand under-65 residents.

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