What ACA marketplace plans are available in Williston, North Dakota in 2026?
Williston, North Dakota (population 28,056), covering ZIP codes 58801, 58802, 58803 sits in Williams County, where 28 ACA marketplace plans from 3 insurers are available in 2026 with a benchmark (second-lowest-cost silver) plan at $639 per month for a 40-year-old. 2027 plans for Williams County are now available.
Updated July 23, 2026 · Reviewed by Jason Burns, Editorial Steward
Reviewed by Heather Fabrizio, Licensed Insurance Agent (NPN 20983651) · reviewed Jul 25, 2026
Three lowest-cost silver plans at age 40
- Sanford Health Plan — Sanford Individual Simplicity $3,500 · $628.26/mo · deductible $3,500 · MOOP $9,750
- Sanford Health Plan — Sanford Individual Simplicity Standardized $6,000 · $639.29/mo · deductible $6,000 · MOOP $8,900
- Sanford Health Plan — Sanford Individual Simplicity $4,750 · $661.07/mo · deductible $4,750 · MOOP $9,750
See the Williston city page with stats and ZIP codes →
Source: PY2026 QHP Landscape, Individual Market Medical (CMS Public Use File, released May 2026).