ACA marketplace plans in Williston, North Dakota (2026)
Williston, North Dakota (population 28,056, ACS 2020-2024), 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.
City stats
- Population: 28,056 (ACS 2020-2024)
- Uninsured rate: 11.4% (ACS 2020-2024, table S2701)
- Median household income: $79,381 (ACS 2020-2024, table B19013)
ZIP codes covered
58801, 58802, 58803
Source: GeoNames US postal 2026-07-22.
Five lowest-cost plans in Williams County (age 40)
- Blue Cross Blue Shield of North Dakota — BlueEssential Catastrophic 100 HSA Eligible $10600 Deductible · Catastrophic · $373.82/mo · deductible $10,600 · MOOP $10,600
- Sanford Health Plan — Sanford Individual Simplicity $10,600 · Catastrophic · $416.87/mo · deductible $10,600 · MOOP $10,600
- Blue Cross Blue Shield of North Dakota — BlueCare Bronze HSA Eligible $50 PCP Copay ($5 Value Based Drug List) · Expanded Bronze · $434.01/mo · deductible $6,000 · MOOP $10,150
- Blue Cross Blue Shield of North Dakota — BlueValue Bronze HSA Eligible $50 PCP Copay (Standardized plan) · Expanded Bronze · $449.75/mo · deductible $7,500 · MOOP $10,000
- Blue Cross Blue Shield of North Dakota — BlueDirect Bronze 100 HSA Eligible ($8000 Deductible / $5 Preventive Drug List) · Expanded Bronze · $460.67/mo · deductible $8,000 · MOOP $8,000
See the full Williams County plan table with every issuer, metal tier, and cost-sharing figure →
Subsidy context for 2026
The enhanced premium tax credits from the American Rescue Plan Act and the Inflation Reduction Act expired December 31, 2025, so for plan year 2026 the pre-2021 ACA subsidy structure returns — households above 400% of the federal poverty level receive no premium tax credit at all, and lower-income households pay a larger share of the benchmark plan's premium (Congressional Research Service report R48290; KFF's 2026 premium tracker).
Sources
- PY2026 QHP Landscape, Individual Market Medical — CMS Public Use File, released May 2026. All plan and premium figures come from this file.
- American Community Survey 5-Year Estimates, 2020-2024 — U.S. Census Bureau. Population/income/uninsured figures where present.
- ZIP-city association: GeoNames US postal 2026-07-22 — postal geography derived from USPS ZIP city listings.
- Full methodology: how we source and interpret this data →