Industry
KFF Maps Show ACA Marketplace Enrollment Drops by District
KFF published interactive maps tracking ACA Marketplace enrollment and year-over-year changes by congressional district and state. The data show enrollment declined in most congressional districts between 2025 and 2026, with 67% of the national decline concentrated in Republican-held districts. The maps let users compare enrollment levels and shifts across districts and states. KFF frames this as a resource for understanding geographic and political variation in Marketplace coverage losses.
Why it mattersState policymakers, insurers, and advocates tracking Marketplace stability can use the district-level data to anticipate coverage gaps and target outreach as enrollment losses concentrate unevenly across political and geographic lines.