States ranked by market share of largest insurer

Delaware’s largest payer controls 93% of the state’s health insurance market, while Washington state’s largest insurer controls just 24%, according to KFF.

The 2023 data was obtained from the “Health Coverage Portal TM,” a database maintained by Mark Farrah Associates. 

States ranked by market share of largest insurer:

1. Delaware: 93%
2. Iowa: 90%
3. Utah: 87%
4. District of Columbia: 81%
5. Alabama: 79%
6. Alaska: 79%
7. Louisiana: 73%
8. Mississippi: 70%
9. Oklahoma: 68%
10. Hawaii: 67%
11. Maryland: 67%
12. Nebraska: 67%
13. New Hampshire: 67%
14. Connecticut: 66%
15. Illinois: 65%
16. West Virginia: 65%
17. Vermont: 64%
18. South Carolina: 63%
19. North Dakota: 60%
20. Massachusetts: 59%
21. New Jersey: 58%
22. Wyoming: 58%
23. Kansas: 57%
24. Rhode Island: 57%
25. Arkansas: 55%
26. Kentucky: 55%
27. Minnesota: 53%
28. North Carolina: 52%
29. Nevada: 49%
30. New Mexico: 49%
31. Missouri: 46%
32. Florida: 43%
33. Montana: 43%
34. Tennessee: 43%
35. Colorado: 39%
36. Georgia: 38%
37. Michigan: 38%
38. Virginia: 38%
39. Indiana: 36%
40. Ohio: 36%
41. South Dakota: 36%
42. California: 35%
43. Idaho: 35%
44. Maine: 35%
45. Pennsylvania: 34%
46. New York: 31%
47. Arizona: 29%
48. Oregon: 29%
49. Texas: 29%
50. Wisconsin: 26%
51. Washington: 24%