4,773,896
Total Medicare beneficiaries
53.4%
On Medicare Advantage
46.6%
On Original Medicare
$202.90
Standard Part B premium (2026)
Medicare Enrollment by County in Texas
The 15 most-populous counties by Medicare beneficiaries. Click any column heading to sort. Medicare Advantage percentage is the share of each county’s beneficiaries enrolled in an MA or other health plan.
| Harris County | 631,505 | 59.7% |
| Dallas County | 351,999 | 53.2% |
| Bexar County | 327,574 | 57.1% |
| Tarrant County | 308,814 | 55.3% |
| Travis County | 153,139 | 46.4% |
| Collin County | 148,301 | 42.5% |
| El Paso County | 146,888 | 72.0% |
| Fort Bend County | 125,866 | 54.3% |
| Denton County | 125,582 | 44.6% |
| Hidalgo County | 119,266 | 74.4% |
| Montgomery County | 113,067 | 51.6% |
| Williamson County | 98,408 | 46.3% |
| Cameron County | 70,678 | 70.8% |
| Galveston County | 66,572 | 55.5% |
| Nueces County | 65,448 | 63.3% |
Key Findings: Medicare in Texas
- 1Texas has about 4.77 million Medicare beneficiaries spread across 254 counties — the most counties of any state.
- 253.4% of Texas beneficiaries are on Medicare Advantage, just below Florida and right around the national average.
- 3Border and Rio Grande Valley counties have the highest MA penetration in the state: Hidalgo (74.4%), El Paso (72.0%), and Cameron (70.8%).
- 4Fast-growing suburban counties north of the major metros lean toward Original Medicare: Collin (42.5%) and Denton (44.6%).
- 5Harris County alone has more than 631,000 Medicare beneficiaries — larger than the entire Medicare population of several states.
How Texas Compares to National Averages
Medicare Advantage penetration
Texas is at 53.4%, 0.6 points below the national average of about 54%.
Plans available
Nationally, the average beneficiary can choose from about 32 Medicare Advantage prescription-drug plans for 2026. The exact number available depends on your county.
Medicare Supplement (Medigap)
Nationally, about 41.9% of Original Medicare beneficiaries carry a Medigap policy (AHIP, 2023). State-by-state Medigap rates are not published in an open dataset, so this figure is national. In Texas, 46.6% of beneficiaries are in Original Medicare and therefore eligible to buy Medigap.
Find the Best Medicare Plan in Your Texas County
The right plan depends on where you live. Get a free, personalized review of the Medicare options available in your Texas county from a licensed advisor.
Get My Free Medicare ReviewMethodology & Sources
Enrollment and county data: Centers for Medicare & Medicaid Services, Medicare Monthly Enrollment, 2024 (data.cms.gov). Figures are 2024 annual counts. Medicare Advantage percentage = (beneficiaries in Medicare Advantage & Other Health Plans ÷ total beneficiaries) × 100. The county table shows the 15 most-populous counties of 254 total.
Part B premium: CMS, 2026 Medicare Parts A & B Premiums and Deductibles. The standard premium is set federally and is the same in every state; higher-income beneficiaries pay an income-related adjustment (IRMAA).
Plan counts and Medigap: KFF, Medicare Advantage 2026 Spotlight (CMS Landscape files); AHIP, The State of Medicare Supplement Coverage, 2023. These are reported as national figures only.
Limitations: Medicare Supplement (Medigap) enrollment and per-county plan counts are not available in an open dataset at the state or county level, so they are not shown per county. Percentages are rounded. Last updated 2026-06-11.
This page is for educational purposes. HealthPlan Connect is not affiliated with or endorsed by CMS or any government agency. Contact a licensed advisor for current plan options in your area.