50 states ranked by number of preterm births

California has the most premature births among all states, with 40,907 such births recorded in 2017, according to a ranking from the Kaiser Family Foundation.

The ranking is based on 2017 birthing data from the CDC's National Vital Statistics Reports. Preterm births are defined as infants born before 37 weeks.

In total, there were 382,726 premature births among U.S. women of all races in 2017, according to the Kaiser Family Foundation.

Here's how each state stacks up:

  1. California — 40,907 preterm births in 2017
  2. Texas — 40,403
  3. Florida — 22,851
  4. New York — 20,607
  5. Illinois — 15,551
  6. Georgia — 14,756
  7. Ohio — 14,168
  8. Pennsylvania — 12,969
  9. North Carolina — 12,591
  10. Michigan — 11,406
  11. New Jersey — 9,613
  12. Virginia — 9,582
  13. Tennessee — 8,962
  14. Indiana — 8,087
  15. Louisiana — 7,725
  16. Missouri — 7,702
  17. Arizona — 7,578
  18. Maryland — 7,491
  19. Washington — 7,334
  20. Alabama — 7,090
  21. South Carolina — 6,396
  22. Massachusetts — 6,272
  23. Wisconsin — 6,260
  24. Minnesota — 6,111
  25. Kentucky — 6,092
  26. Colorado — 5,638
  27. Oklahoma — 5,592
  28. Mississippi — 5,061
  29. Utah — 4,588
  30. Arkansas — 4,268
  31. Nevada — 3,833
  32. Oregon — 3,640
  33. Iowa — 3,524
  34. Kansas — 3,495
  35. Connecticut — 3,338
  36. Nebraska — 2,556
  37. New Mexico — 2,435
  38. West Virginia — 2,237
  39. Idaho — 1,941
  40. Hawaii — 1,829
  41. South Dakota — 1,125
  42. Montana — 1,118
  43. Delaware — 1,108
  44. Maine — 1,066
  45. New Hampshire — 1,010
  46. North Dakota — 944
  47. Alaska — 937
  48. Rhode Island — 882
  49. Wyoming — 616
  50. Vermont — 425

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