Medicare in Williamson County · Round Rock · Georgetown · Cedar Park
2026 Medicare Plans in Williamson County, TX
Williamson County is the boom story of the Greater Austin area & Central Texas: its Medicare population has reached 102,754 beneficiaries (2025), up 94% since 2013 and 4.4% in the last year alone as retirees pour into Round Rock, Georgetown, and Leander. About 46.8% are in Medicare Advantage. With plan networks differing town to town across the county, the smart move is a ZIP-level comparison — and that's exactly what SilverShield does, free, using the real CMS data below.
By the numbers · Williamson County, TX
Quick facts for Williamson County Medicare
How Williamson County gets its Medicare
Original Medicare vs. Medicare Advantage in Williamson County
Of the 102,754 people on Medicare in Williamson County, 54,711 stayed with Original Medicare (often paired with a Medigap and a standalone Part D plan) while 48,043 — 46.8% — chose a Medicare Advantage plan. Enrollment grew 4.4% in the last year and is up 94% since 2013.
Source: CMS Medicare Monthly Enrollment by County (2025). Part D includes both standalone (PDP) and Medicare-Advantage (MAPD) drug plans, so it overlaps the rows above.
Coverage breakdown
Where Williamson County beneficiaries land (2025)
| Coverage path | People | Share of all beneficiaries |
|---|---|---|
| Original Medicare (Part A & B) | 54,711 | 53.2% |
| Medicare Advantage (Part C) | 48,043 | 46.8% |
| Standalone Part D drug plan (PDP) | 43,554 | 42.4% |
| Drug coverage built into an MA plan (MAPD) | 36,177 | 35.2% |
| Aged (65+) | 95,940 | 93.4% |
| Under-65 on Medicare by disability | 6,814 | 6.6% |
Source: CMS Medicare Monthly Enrollment by County (2025). People can appear in more than one row (e.g. an MA member with built-in drug coverage).
Health profile · why coverage choice matters here
Chronic conditions among Williamson County adults
The right Medicare plan depends on your health. Here's how common key conditions are locally (CDC PLACES, model-based prevalence among 697,191 adults) — a reason to check each plan's drug formulary and specialist network before you enroll.
Source: CDC PLACES: Local Data for Better Health, County 2023 (2023).
Where you get care
Doctors & pharmacies near Round Rock
- 127 family-medicine providers in Round Rock
- 45 pharmacies in Round Rock
Make sure your doctors and pharmacy are in a plan's network before you enroll — we check that for you.
Hospitals
Hospital quality near Round Rock
Williamson County is served by major Central Texas health systems. We confirm a plan covers your preferred hospital before you enroll, rather than listing an unverified rating here.
Sources: NPPES NPI Registry (provider counts).
Choosing a Medicare plan in Williamson County — what matters here
- One county, many towns. Round Rock, Georgetown, Cedar Park, and Leander don't all share the same plan networks. A plan that's strong in Georgetown may not include your Cedar Park clinic — so we compare by your exact ZIP.
- A fast-changing market. With enrollment up 94% since 2013, carriers add and adjust plans here often. Re-shopping each Annual Enrollment Period (Oct 15 – Dec 7) keeps you from drifting into a worse-fitting renewal.
- Mostly age-65 enrollees. 93.4% of the county's beneficiaries qualify by age, and dual-eligibility is lower here (6.5%) than in urban Travis County — so for most Williamson clients the decision is Advantage vs. Medigap + Part D.
- Your prescriptions. 77.6% carry Part D coverage; formularies and pharmacy networks differ, so we price your actual drug list, not just the premium.
- Next door: just south in the city core? See Austin / Travis County Medicare plans →
Williamson County Medicare questions, answered
How many people are on Medicare in Williamson County, TX?
About 102,754 people are enrolled in Medicare in Williamson County (2025), per CMS Medicare Monthly Enrollment data. That's up 4.4% in just one year and 94% since 2013 — one of the fastest-growing Medicare markets in Central Texas as Round Rock, Georgetown, and Leander fill with retirees.
Is Medicare Advantage popular in Round Rock and Georgetown?
Yes — 48,043 Williamson County beneficiaries (46.8%) are in a Medicare Advantage plan, with the remaining 54,711 on Original Medicare. Because the county spans Round Rock, Georgetown, Cedar Park, and Leander, plan networks and extras vary by town, so a ZIP-level check matters here.
Williamson County's Medicare population is growing fast — does that change my plan choices?
It can. Rapid growth (94% since 2013) brings new carriers and plan options into the county, and plans adjust networks and premiums year to year. That's exactly why we re-shop your coverage each Annual Enrollment Period instead of letting it auto-renew.
Do you serve Georgetown, Cedar Park, and Leander too — not just Round Rock?
Yes. SilverShield Medicare serves all of Williamson County — Round Rock, Georgetown, Cedar Park, Leander, Hutto, and Taylor — plus the wider Greater Austin area. We compare the plans available in your specific ZIP code.
How much does help choosing a Medicare plan cost?
Nothing. Our help is free because licensed agents are paid by the insurance carriers, not by you. We do not offer every plan in Williamson County, and we'll say so when another option may suit you better.
Talk to a local Williamson County Medicare advisor
Free, no pressure — serving Round Rock, Georgetown, Cedar Park & Leander.