What ACA marketplace plans are available in Round Rock, Texas in 2026?
Round Rock, Texas (population 127,786), covering ZIP codes 78664, 78665, 78680, 78681, 78682 and 1 more sits in Williamson County, where 110 ACA marketplace plans from 9 insurers are available in 2026 with a benchmark (second-lowest-cost silver) plan at $625 per month for a 40-year-old. 2027 plans for Williamson County are now available — to compare them and enroll, call United Enrollment Services, a licensed insurance agency, at 1-866-401-4116.
Updated July 23, 2026 · Reviewed by Jason Burns, Editorial Steward
Reviewed by Heather Fabrizio, licensed in Texas (License #3124008) · reviewed Jul 25, 2026
Three lowest-cost silver plans at age 40
- Sendero Health Plans, Local Nonprofit — Sendero Health Capital Silver / $40 PCP / $80 Specialist / $20 Generic Drugs · $607.90/mo · deductible $6,000 · MOOP $8,900
- Sendero Health Plans, Local Nonprofit — Sendero Health Original Silver / $20 PCP + 2 $0 PCP Visits / $10 Generic Drugs · $624.97/mo · deductible $4,250 · MOOP $7,750
- Harbor Health — Harbor Health S1 $0 PCP $0 Mental Health Office Visit $0 Express Care · $652.07/mo · deductible $9,900 · MOOP $10,150
See the Round Rock city page with stats and ZIP codes →
Source: PY2026 QHP Landscape, Individual Market Medical (CMS Public Use File, released May 2026).