2,898,000
Total Medicare beneficiaries
54%
On Medicare Advantage
46%
On Original Medicare
$202.90
Standard Part B premium (2026)
Medicare Enrollment by County in Pennsylvania
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.
| Allegheny County | 290,959 | 74.8% |
| Philadelphia County | 274,655 | 64.9% |
| Montgomery County | 192,452 | 40.4% |
| Bucks County | 159,582 | 45.1% |
| Lancaster County | 127,858 | 54.1% |
| Delaware County | 124,259 | 43.0% |
| Chester County | 113,969 | 35.6% |
| York County | 107,987 | 55.0% |
| Westmoreland County | 104,555 | 75.9% |
| Berks County | 95,990 | 48.7% |
| Lehigh County | 82,973 | 49.6% |
| Northampton County | 80,524 | 46.1% |
| Luzerne County | 80,060 | 46.6% |
| Erie County | 67,556 | 66.9% |
| Dauphin County | 64,363 | 65.2% |
Key Findings: Medicare in Pennsylvania
- 1Pennsylvania has about 2.9 million Medicare beneficiaries — one of the largest Medicare populations among the states HealthPlan Connect serves.
- 254% of Pennsylvania beneficiaries are enrolled in Medicare Advantage, right in line with the national average of about 54%.
- 3Medicare Advantage penetration varies widely across the largest counties — from 75.9% in Westmoreland and 74.8% in Allegheny (Pittsburgh) down to 35.6% in Chester and 40.4% in Montgomery, the high-Medigap Philadelphia suburbs.
- 4Allegheny County has the most Medicare beneficiaries in the state at about 291,000, narrowly ahead of Philadelphia County at about 275,000.
- 5Philadelphia County has by far the highest share of dual-eligible (Medicare and Medicaid) beneficiaries among large counties, at 28.9%.
How Pennsylvania Compares to National Averages
Medicare Advantage penetration
Pennsylvania is at 54%, in line with 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 Pennsylvania, 46% of beneficiaries are in Original Medicare and therefore eligible to buy Medigap.
Find the Best Medicare Plan in Your Pennsylvania County
The right plan depends on where you live. Get a free, personalized review of the Medicare options available in your Pennsylvania 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 67 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.