830,945
people with Medicare
July 2026, CMS Medicare Monthly Enrollment
42%
in Medicare Advantage or other health plans
July 2026, CMS
50
Medicare Advantage plans open to everyone, 2027
CY2027 Landscape, CMS
15,628
members whose plan ends December 31, 2026
CMS Landscape, crosswalk and October 2026 enrollment
Statewide
- 830,945 people with Medicare in July 2026: 478,711 in Original Medicare and 352,234 in Medicare Advantage and other health plans. Source: CMS Medicare Monthly Enrollment (data.cms.gov).
- 345,490 Medicare Advantage members (HMO and PPO plans, special needs and employer plans included) in October 2026. Source: CMS Monthly Enrollment by Contract, Plan, State and County, October 2026. CMS hides counts of 10 or fewer, so the real total is a little higher.
- 50 Medicare Advantage plans open to everyone, 27 special needs plans and 9 companies in Oklahoma for 2027; 9 standalone Part D plans statewide. Source: CMS CY2027 Medicare Advantage and Part D Landscape file (November 2026 release).
- 7 counties with no Medicare Advantage plan open to everyone in 2027: Beaver, Cimarron, Ellis, Harmon, Harper, Roger Mills, Texas. Only special needs plans are sold there; Original Medicare, Medigap and Part D are still available. Source: CMS CY2027 Medicare Advantage and Part D Landscape file (November 2026 release).
- 15,628 members whose Medicare Advantage plan ends December 31, 2026: 12,734 because their company leaves their county and 2,894 because their plan ends where the company stays. Sources: CMS CY2027 Medicare Advantage and Part D Landscape file (November 2026 release), CMS 2027 Part C&D Plan Crosswalk (which 2026 plans renew, merge or end) and CMS Monthly Enrollment by Contract, Plan, State and County, October 2026. Details on plans ending in 2027.
- Counties with the most people on Medicare: Oklahoma (147,480), Tulsa (129,024), Cleveland (53,886), Canadian (29,191), Comanche (21,961).
By county
Each county's numbers, with the same sources and dates as above. Download the table (CSV).
| County | Region | People with Medicare | Original Medicare | Medicare Advantage and other plans | Share in Medicare Advantage | Plans open to everyone, 2027 | Special needs plans, 2027 | Companies, 2027 | Members whose plan ends |
|---|---|---|---|---|---|---|---|---|---|
| Adair County | Green Country (Northeast) | 4,622 | 2,502 | 2,120 | 46% | 22 | 14 | 5 | 22 |
| Alfalfa County | Northwest and North Central | 1,175 | 927 | 248 | 21% | 7 | 7 | 3 | 87 |
| Atoka County | Southeast (Kiamichi Country) | 3,102 | 2,082 | 1,020 | 33% | 10 | 5 | 4 | 72 |
| Beaver County | Panhandle | 1,037 | 877 | 160 | 15% | 0 | 3 | 1 | 93 |
| Beckham County | Southwest | 4,298 | 3,319 | 979 | 23% | 7 | 3 | 1 | 0 |
| Blaine County | Northwest and North Central | 2,137 | 1,515 | 622 | 29% | 13 | 11 | 4 | 159 |
| Bryan County | South Central | 10,545 | 6,742 | 3,803 | 36% | 9 | 10 | 4 | 914 |
| Caddo County | Southwest | 6,470 | 4,215 | 2,255 | 35% | 12 | 11 | 4 | 396 |
| Canadian County | Oklahoma City metro | 29,191 | 16,930 | 12,261 | 42% | 34 | 23 | 8 | 224 |
| Carter County | South Central | 11,927 | 7,647 | 4,280 | 36% | 12 | 14 | 5 | 526 |
| Cherokee County | Green Country (Northeast) | 10,327 | 6,330 | 3,997 | 39% | 18 | 11 | 5 | 91 |
| Choctaw County | Southeast (Kiamichi Country) | 3,890 | 2,448 | 1,442 | 37% | 10 | 7 | 3 | 195 |
| Cimarron County | Panhandle | 529 | 422 | 107 | 20% | 0 | 3 | 1 | 43 |
| Cleveland County | Oklahoma City metro | 53,886 | 31,852 | 22,034 | 41% | 33 | 22 | 8 | 376 |
| Coal County | Southeast (Kiamichi Country) | 1,259 | 810 | 449 | 36% | 10 | 6 | 3 | 0 |
| Comanche County | Southwest | 21,961 | 14,281 | 7,680 | 35% | 19 | 10 | 4 | 140 |
| Cotton County | Southwest | 1,347 | 968 | 379 | 28% | 12 | 5 | 4 | 11 |
| Craig County | Green Country (Northeast) | 3,924 | 2,269 | 1,655 | 42% | 23 | 14 | 5 | 0 |
| Creek County | Tulsa metro | 17,341 | 7,442 | 9,899 | 57% | 26 | 20 | 7 | 2,024 |
| Custer County | Southwest | 5,161 | 3,765 | 1,396 | 27% | 8 | 4 | 2 | 40 |
| Delaware County | Green Country (Northeast) | 11,747 | 6,373 | 5,374 | 46% | 19 | 10 | 4 | 680 |
| Dewey County | Northwest and North Central | 1,176 | 965 | 211 | 18% | 7 | 6 | 2 | 16 |
| Ellis County | Northwest and North Central | 953 | 809 | 144 | 15% | 0 | 3 | 1 | 66 |
| Garfield County | Northwest and North Central | 12,920 | 9,171 | 3,749 | 29% | 14 | 13 | 4 | 133 |
| Garvin County | South Central | 6,599 | 3,877 | 2,722 | 41% | 27 | 19 | 7 | 64 |
| Grady County | Oklahoma City metro | 11,716 | 7,254 | 4,462 | 38% | 23 | 17 | 6 | 480 |
| Grant County | Northwest and North Central | 1,041 | 805 | 236 | 23% | 8 | 8 | 4 | 45 |
| Greer County | Southwest | 1,333 | 977 | 356 | 27% | 11 | 4 | 3 | 0 |
| Harmon County | Southwest | 595 | 427 | 168 | 28% | 0 | 3 | 1 | 59 |
| Harper County | Northwest and North Central | 860 | 765 | 95 | 11% | 0 | 3 | 1 | 38 |
| Haskell County | Southeast (Kiamichi Country) | 3,103 | 1,935 | 1,168 | 38% | 18 | 8 | 4 | 0 |
| Hughes County | South Central | 3,073 | 1,853 | 1,220 | 40% | 22 | 14 | 6 | 116 |
| Jackson County | Southwest | 4,734 | 3,511 | 1,223 | 26% | 5 | 7 | 3 | 401 |
| Jefferson County | Southwest | 1,498 | 1,079 | 419 | 28% | 13 | 6 | 5 | 63 |
| Johnston County | South Central | 2,566 | 1,580 | 986 | 38% | 9 | 8 | 4 | 227 |
| Kay County | Northwest and North Central | 10,725 | 6,868 | 3,857 | 36% | 12 | 9 | 3 | 390 |
| Kingfisher County | Northwest and North Central | 3,307 | 2,344 | 963 | 29% | 26 | 17 | 6 | 0 |
| Kiowa County | Southwest | 2,288 | 1,509 | 779 | 34% | 14 | 6 | 2 | 19 |
| Latimer County | Southeast (Kiamichi Country) | 2,586 | 1,664 | 922 | 36% | 14 | 6 | 3 | 0 |
| Le Flore County | Southeast (Kiamichi Country) | 11,912 | 6,750 | 5,162 | 43% | 19 | 10 | 4 | 47 |
| Lincoln County | Oklahoma City metro | 8,218 | 4,544 | 3,674 | 45% | 27 | 21 | 8 | 812 |
| Logan County | Oklahoma City metro | 10,166 | 5,851 | 4,315 | 42% | 34 | 22 | 8 | 71 |
| Love County | South Central | 2,328 | 1,511 | 817 | 35% | 6 | 5 | 4 | 293 |
| Major County | Northwest and North Central | 1,748 | 1,431 | 317 | 18% | 8 | 8 | 4 | 65 |
| Marshall County | South Central | 4,351 | 2,695 | 1,656 | 38% | 6 | 5 | 4 | 828 |
| Mayes County | Green Country (Northeast) | 9,997 | 5,169 | 4,828 | 48% | 26 | 16 | 6 | 44 |
| McClain County | Oklahoma City metro | 10,363 | 6,289 | 4,074 | 39% | 32 | 21 | 8 | 50 |
| McCurtain County | Southeast (Kiamichi Country) | 7,424 | 5,179 | 2,245 | 30% | 7 | 4 | 2 | 716 |
| McIntosh County | Green Country (Northeast) | 5,951 | 3,353 | 2,598 | 44% | 27 | 18 | 7 | 33 |
| Murray County | South Central | 3,398 | 2,512 | 886 | 26% | 17 | 10 | 4 | 0 |
| Muskogee County | Green Country (Northeast) | 16,337 | 9,603 | 6,734 | 41% | 25 | 16 | 7 | 55 |
| Noble County | Northwest and North Central | 2,681 | 2,033 | 648 | 24% | 9 | 9 | 3 | 188 |
| Nowata County | Green Country (Northeast) | 2,475 | 1,407 | 1,068 | 43% | 16 | 12 | 5 | 307 |
| Okfuskee County | South Central | 2,706 | 1,478 | 1,228 | 45% | 24 | 16 | 7 | 171 |
| Oklahoma County | Oklahoma City metro | 147,480 | 80,428 | 67,052 | 45% | 35 | 24 | 8 | 602 |
| Okmulgee County | Tulsa metro | 9,339 | 4,600 | 4,739 | 51% | 32 | 23 | 8 | 43 |
| Osage County | Tulsa metro | 9,843 | 5,073 | 4,770 | 48% | 24 | 16 | 5 | 159 |
| Ottawa County | Green Country (Northeast) | 8,146 | 4,225 | 3,921 | 48% | 23 | 14 | 5 | 29 |
| Pawnee County | Tulsa metro | 3,972 | 2,210 | 1,762 | 44% | 24 | 18 | 6 | 143 |
| Payne County | Northwest and North Central | 13,998 | 11,006 | 2,992 | 21% | 11 | 6 | 2 | 0 |
| Pittsburg County | Southeast (Kiamichi Country) | 10,720 | 6,720 | 4,000 | 37% | 21 | 14 | 5 | 231 |
| Pontotoc County | South Central | 8,517 | 5,821 | 2,696 | 32% | 12 | 13 | 4 | 421 |
| Pottawatomie County | South Central | 16,882 | 9,249 | 7,633 | 45% | 29 | 21 | 7 | 152 |
| Pushmataha County | Southeast (Kiamichi Country) | 3,088 | 1,950 | 1,138 | 37% | 17 | 8 | 4 | 0 |
| Roger Mills County | Southwest | 831 | 693 | 138 | 17% | 0 | 3 | 1 | 76 |
| Rogers County | Tulsa metro | 20,929 | 10,577 | 10,352 | 49% | 24 | 16 | 6 | 63 |
| Seminole County | South Central | 5,552 | 2,866 | 2,686 | 48% | 30 | 20 | 8 | 46 |
| Sequoyah County | Green Country (Northeast) | 10,613 | 5,706 | 4,907 | 46% | 20 | 10 | 4 | 64 |
| Stephens County | Southwest | 11,302 | 8,269 | 3,033 | 27% | 19 | 11 | 5 | 91 |
| Texas County | Panhandle | 2,747 | 2,231 | 516 | 19% | 0 | 3 | 1 | 311 |
| Tillman County | Southwest | 1,646 | 1,037 | 609 | 37% | 11 | 3 | 2 | 0 |
| Tulsa County | Tulsa metro | 129,024 | 61,952 | 67,072 | 52% | 32 | 23 | 8 | 747 |
| Wagoner County | Tulsa metro | 18,150 | 8,900 | 9,250 | 51% | 29 | 17 | 6 | 72 |
| Washington County | Green Country (Northeast) | 12,895 | 7,892 | 5,003 | 39% | 13 | 11 | 3 | 150 |
| Washita County | Southwest | 2,540 | 1,864 | 676 | 27% | 8 | 3 | 2 | 0 |
| Woods County | Northwest and North Central | 1,785 | 1,467 | 318 | 18% | 4 | 3 | 2 | 118 |
| Woodward County | Northwest and North Central | 3,942 | 3,061 | 881 | 22% | 4 | 6 | 2 | 220 |
How these are counted
- People with Medicare: total beneficiaries in CMS's Medicare Monthly Enrollment file, July 2026, by county of residence. "Medicare Advantage and other plans" is CMS's category for Medicare Advantage and other Medicare health plans.
- Plans open to everyone: Medicare Advantage plans (with or without drug coverage) that aren't special needs plans, counted by contract and plan in the CY2027 Landscape file.
- Members whose plan ends: October 2026 members of regular plans that end or leave their county, from the Landscape files and the 2027 Plan Crosswalk; people CMS moves into another plan that still covers their county aren't counted.
- We don't show plans' premiums, cost sharing, star ratings or benefits.
Sources
- CMS Medicare Monthly Enrollment (data.cms.gov)
- CMS CY2027 Medicare Advantage and Part D Landscape file (November 2026 release)
- CMS Monthly Enrollment by Contract, Plan, State and County, October 2026
- CMS 2027 Part C&D Plan Crosswalk (which 2026 plans renew, merge or end)
Frequently asked questions
How many people have Medicare in Oklahoma?
830,945 Oklahomans had Medicare in July 2026, according to CMS's Medicare Monthly Enrollment data: 478,711 in Original Medicare and 352,234 in Medicare Advantage and other health plans.
How many Medicare Advantage plans are there in Oklahoma for 2027?
CMS's CY2027 Landscape file lists 50 Medicare Advantage plans open to everyone with Medicare somewhere in Oklahoma, plus 27 special needs plans, from 9 companies. Plans are sold by county, so the number where you live is lower; 7 counties have none open to everyone.
Can I use these numbers?
Yes. They are public CMS data compiled by OklahomaMedicare.org; please cite CMS and this page. The county table is also a CSV file.
Why don't you show premiums or star ratings?
Plan premiums, costs, benefits and ratings belong with the plans themselves. To see the plans for your ZIP code, compare plans on PlanMatch, or contact Medicare.gov or 1-800-MEDICARE for information on all of your options.