Harrison County is the largest county on Mississippi's Gulf Coast and the economic and population hub of coastal Mississippi. Gulfport serves as the county seat and the state's second-largest city; Biloxi, just east along the coast, is nationally known for its casino resort industry and serves as home to Keesler Air Force Base. Together, Gulfport and Biloxi anchor a metro area of roughly 220,000 people with a distinctive economic identity built on gaming, tourism, military presence, and post-Katrina reconstruction and development.
For health insurance purposes, Harrison County residents enroll through the federal marketplace at healthcare.gov using their Mississippi zip code. The county's large service-sector workforce — particularly the tens of thousands employed in casino, hotel, food service, and hospitality roles — makes it one of the most significant ACA markets in Mississippi.
Ambetter from Magnolia Health is the primary ACA marketplace carrier serving Harrison County. As a Centene Corporation affiliate, Ambetter has built a broad provider network in coastal Mississippi that includes Memorial Hospital at Gulfport and Garden Park Medical Center. Humana may also participate in the Harrison County market — always verify current options using your specific Gulfport or Biloxi zip code at healthcare.gov, as carrier participation can shift year to year.
The casino and resort industry employs a significant share of Harrison County's workforce. Properties including Beau Rivage (MGM Grand), Harrah's Gulf Coast, IP Casino Resort, Palace Casino, and several others collectively employ tens of thousands of workers across all shifts and departments. The coverage picture is mixed: large resort properties typically offer employer-sponsored health benefits to full-time employees, but a substantial portion of the industry workforce is part-time, seasonal, employed through contractors, or works in roles that do not meet benefit eligibility thresholds.
Workers in this category — including table game dealers, housekeeping staff, food service workers, and many support roles — represent exactly the population the ACA marketplace was designed to serve. At income levels of $20,000–$35,000 annually (common in these roles), ACA subsidies can reduce monthly premiums dramatically. At $20,000 (roughly 125% FPL for a single adult), a CSR-enhanced Silver plan may cost as little as $20–$50 per month with deductibles as low as $300–$500 — coverage that is genuinely comparable to employer-sponsored plans.
Keesler Air Force Base in Biloxi is a major military presence in Harrison County, home to the 81st Training Wing and a significant Air Force medical training mission. Active-duty service members at Keesler are covered by TRICARE and are not eligible for ACA marketplace subsidies. Dependents of active-duty service members are also typically TRICARE-eligible. Separating veterans and military retirees may have different circumstances — those separating from active duty have a 60-day Special Enrollment Period to enroll in marketplace coverage, and military retirees under age 65 should compare their TRICARE options with marketplace plans to determine the best combination of cost and coverage.
Harrison County is served by two major hospital systems. Memorial Hospital at Gulfport is the county's largest hospital, a full-service acute care facility serving both coastal and inland Mississippi residents. Garden Park Medical Center (Gulfport) provides additional acute care capacity. When evaluating an ACA plan in Harrison County, verify that your preferred hospital and your primary care physician are in the plan's network — particularly important given Ambetter's market dominance and the limited carrier alternatives available.
Hurricane Katrina (2005) devastated Harrison County. The storm surge in Gulfport and Biloxi exceeded 25 feet in some areas, destroying or severely damaging significant portions of the coastal development. The casino industry, which had operated on barges offshore before Katrina, was permitted to rebuild on land afterward — accelerating both the physical and economic reconstruction of the coastal corridor. The post-Katrina rebuilding created substantial construction and trades employment, and the rebuilt casino economy brought significant hospitality and service-sector job growth. However, the recovery also left behind pockets of economic vulnerability, particularly among residents who were displaced and returned to lower-income housing further inland.
| Annual Income (Single Adult) | % of FPL (2026) | Subsidy Status | Est. Net Monthly Cost (Silver) |
|---|---|---|---|
| Below $15,960 | Below 100% | MS Medicaid gap — no subsidy available | Full premium (no assistance) |
| $15,960 – $23,940 | 100–150% | Maximum subsidy + Enhanced Silver CSRs | $0 – $25/month |
| $23,941 – $31,920 | 150–200% | Strong subsidy + Enhanced Silver CSRs | $25 – $70/month |
| $31,921 – $47,880 | 200–300% | Meaningful subsidy | $70 – $170/month |
| $47,881 – $63,840 | 300–400% | Moderate subsidy | $170 – $285/month |
Estimates for a single 40-year-old on a benchmark Silver plan in Harrison County. MS premiums are among the lowest nationally. Not guaranteed quotes — verify at healthcare.gov.
Ready to compare Harrison County health insurance plans? A licensed agent familiar with the Mississippi Gulf Coast can help you find coverage at no cost to you. Call (877) 224-8539 or get a free quote below.
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