Counties with the most tornadoes in Ohio
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- Tornadoes since 2000: 5 (1.07 per 100 square miles)
- #1,736 nationally
- Tornadoes this year, as of May 31: 0
- #1,736 nationally
- Tornadoes this year, as of May 31: 0
#50. Madison County
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- Tornadoes since 2000: 6 (1.13 per 100 square miles)
- #1,698 nationally
- Tornadoes this year, as of May 31: 0
- #1,698 nationally
- Tornadoes this year, as of May 31: 0
#49. Columbiana County
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- Tornadoes since 2000: 8 (1.16 per 100 square miles)
- #1,670 nationally
- Tornadoes this year, as of May 31: 1
- #1,670 nationally
- Tornadoes this year, as of May 31: 1
#48. Ross County
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- Tornadoes since 2000: 5 (1.22 per 100 square miles)
- #1,624 nationally
- Tornadoes this year, as of May 31: 0
- #1,624 nationally
- Tornadoes this year, as of May 31: 0
#47. Sandusky County
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- Tornadoes since 2000: 5 (1.22 per 100 square miles)
- #1,622 nationally
- Tornadoes this year, as of May 31: 0
- #1,622 nationally
- Tornadoes this year, as of May 31: 0
#46. Jefferson County
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- Tornadoes since 2000: 5 (1.23 per 100 square miles)
- #1,619 nationally
- Tornadoes this year, as of May 31: 0
- #1,619 nationally
- Tornadoes this year, as of May 31: 0
#45. Perry County
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- Tornadoes since 2000: 5 (1.23 per 100 square miles)
- #1,613 nationally
- Tornadoes this year, as of May 31: 0
- #1,613 nationally
- Tornadoes this year, as of May 31: 0
#44. Hamilton County
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- Tornadoes since 2000: 7 (1.23 per 100 square miles)
- #1,611 nationally
- Tornadoes this year, as of May 31: 0
- #1,611 nationally
- Tornadoes this year, as of May 31: 0
#43. Tuscarawas County
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- Tornadoes since 2000: 8 (1.29 per 100 square miles)
- #1,557 nationally
- Tornadoes this year, as of May 31: 0
- #1,557 nationally
- Tornadoes this year, as of May 31: 0
#42. Trumbull County
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- Tornadoes since 2000: 9 (1.32 per 100 square miles)
- #1,543 nationally
- Tornadoes this year, as of May 31: 1
- #1,543 nationally
- Tornadoes this year, as of May 31: 1
#41. Licking County
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- Tornadoes since 2000: 6 (1.35 per 100 square miles)
- #1,517 nationally
- Tornadoes this year, as of May 31: 0
- #1,517 nationally
- Tornadoes this year, as of May 31: 0
#40. Delaware County
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- Tornadoes since 2000: 8 (1.37 per 100 square miles)
- #1,506 nationally
- Tornadoes this year, as of May 31: 0
- #1,506 nationally
- Tornadoes this year, as of May 31: 0
#39. Adams County
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- Tornadoes since 2000: 7 (1.43 per 100 square miles)
- #1,463 nationally
- Tornadoes this year, as of May 31: 0
- #1,463 nationally
- Tornadoes this year, as of May 31: 0
#38. Lorain County
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- Tornadoes since 2000: 6 (1.44 per 100 square miles)
- #1,450 nationally
- Tornadoes this year, as of May 31: 1
- #1,450 nationally
- Tornadoes this year, as of May 31: 1
#37. Paulding County
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- Tornadoes since 2000: 8 (1.45 per 100 square miles)
- #1,446 nationally
- Tornadoes this year, as of May 31: 0
- #1,446 nationally
- Tornadoes this year, as of May 31: 0
#36. Seneca County
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- Tornadoes since 2000: 6 (1.46 per 100 square miles)
- #1,444 nationally
- Tornadoes this year, as of May 31: 0
- #1,444 nationally
- Tornadoes this year, as of May 31: 0
#35. Vinton County
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- Tornadoes since 2000: 9 (1.62 per 100 square miles)
- #1,333 nationally
- Tornadoes this year, as of May 31: 0
- #1,333 nationally
- Tornadoes this year, as of May 31: 0
#34. Wayne County
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- Tornadoes since 2000: 8 (1.64 per 100 square miles)
- #1,318 nationally
- Tornadoes this year, as of May 31: 0
- #1,318 nationally
- Tornadoes this year, as of May 31: 0
#33. Portage County
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- Tornadoes since 2000: 7 (1.65 per 100 square miles)
- #1,311 nationally
- Tornadoes this year, as of May 31: 1
- #1,311 nationally
- Tornadoes this year, as of May 31: 1
#32. Preble County
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- Tornadoes since 2000: 7 (1.70 per 100 square miles)
- #1,281 nationally
- Tornadoes this year, as of May 31: 0
- #1,281 nationally
- Tornadoes this year, as of May 31: 0
#31. Summit County
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- Tornadoes since 2000: 6 (1.76 per 100 square miles)
- #1,240 nationally
- Tornadoes this year, as of May 31: 0
- #1,240 nationally
- Tornadoes this year, as of May 31: 0
#30. Lucas County
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- Tornadoes since 2000: 7 (1.77 per 100 square miles)
- #1,227 nationally
- Tornadoes this year, as of May 31: 0
- #1,227 nationally
- Tornadoes this year, as of May 31: 0
#29. Carroll County
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- Tornadoes since 2000: 9 (1.82 per 100 square miles)
- #1,194 nationally
- Tornadoes this year, as of May 31: 0
- #1,194 nationally
- Tornadoes this year, as of May 31: 0
#28. Richland County
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- Tornadoes since 2000: 8 (1.89 per 100 square miles)
- #1,132 nationally
- Tornadoes this year, as of May 31: 0
- #1,132 nationally
- Tornadoes this year, as of May 31: 0
#27. Ashland County
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- Tornadoes since 2000: 5 (1.96 per 100 square miles)
- #1,093 nationally
- Tornadoes this year, as of May 31: 0
- #1,093 nationally
- Tornadoes this year, as of May 31: 0
#26. Ottawa County
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- Tornadoes since 2000: 11 (1.99 per 100 square miles)
- #1,067 nationally
- Tornadoes this year, as of May 31: 2
- #1,067 nationally
- Tornadoes this year, as of May 31: 2
#25. Highland County
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- Tornadoes since 2000: 10 (2.07 per 100 square miles)
- #1,004 nationally
- Tornadoes this year, as of May 31: 0
- #1,004 nationally
- Tornadoes this year, as of May 31: 0
#24. Putnam County
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- Tornadoes since 2000: 9 (2.21 per 100 square miles)
- #917 nationally
- Tornadoes this year, as of May 31: 0
- #917 nationally
- Tornadoes this year, as of May 31: 0
#23. Fayette County
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- Tornadoes since 2000: 9 (2.24 per 100 square miles)
- #896 nationally
- Tornadoes this year, as of May 31: 0
- #896 nationally
- Tornadoes this year, as of May 31: 0
#22. Warren County
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- Tornadoes since 2000: 12 (2.25 per 100 square miles)
- #884 nationally
- Tornadoes this year, as of May 31: 0
- #884 nationally
- Tornadoes this year, as of May 31: 0
#21. Franklin County
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- Tornadoes since 2000: 13 (2.26 per 100 square miles)
- #879 nationally
- Tornadoes this year, as of May 31: 0
- #879 nationally
- Tornadoes this year, as of May 31: 0
#20. Stark County
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- Tornadoes since 2000: 14 (2.27 per 100 square miles)
- #872 nationally
- Tornadoes this year, as of May 31: 0
- #872 nationally
- Tornadoes this year, as of May 31: 0
#19. Wood County
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- Tornadoes since 2000: 12 (2.44 per 100 square miles)
- #756 nationally
- Tornadoes this year, as of May 31: 0
- #756 nationally
- Tornadoes this year, as of May 31: 0
#18. Huron County
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- Tornadoes since 2000: 11 (2.50 per 100 square miles)
- #730 nationally
- Tornadoes this year, as of May 31: 0
- #730 nationally
- Tornadoes this year, as of May 31: 0
#17. Pike County
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- Tornadoes since 2000: 15 (2.51 per 100 square miles)
- #726 nationally
- Tornadoes this year, as of May 31: 1
- #726 nationally
- Tornadoes this year, as of May 31: 1
#16. Darke County
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- Tornadoes since 2000: 13 (2.58 per 100 square miles)
- #693 nationally
- Tornadoes this year, as of May 31: 2
- #693 nationally
- Tornadoes this year, as of May 31: 2
#15. Fairfield County
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- Tornadoes since 2000: 12 (2.59 per 100 square miles)
- #686 nationally
- Tornadoes this year, as of May 31: 1
- #686 nationally
- Tornadoes this year, as of May 31: 1
#14. Mercer County
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- Tornadoes since 2000: 11 (2.61 per 100 square miles)
- #676 nationally
- Tornadoes this year, as of May 31: 0
- #676 nationally
- Tornadoes this year, as of May 31: 0
#13. Medina County
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- Tornadoes since 2000: 11 (2.64 per 100 square miles)
- #653 nationally
- Tornadoes this year, as of May 31: 0
- #653 nationally
- Tornadoes this year, as of May 31: 0
#12. Henry County
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- Tornadoes since 2000: 11 (2.73 per 100 square miles)
- #621 nationally
- Tornadoes this year, as of May 31: 3
- #621 nationally
- Tornadoes this year, as of May 31: 3
#11. Allen County
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- Tornadoes since 2000: 14 (2.79 per 100 square miles)
- #590 nationally
- Tornadoes this year, as of May 31: 1
- #590 nationally
- Tornadoes this year, as of May 31: 1
#10. Pickaway County
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- Tornadoes since 2000: 13 (2.82 per 100 square miles)
- #581 nationally
- Tornadoes this year, as of May 31: 0
- #581 nationally
- Tornadoes this year, as of May 31: 0
#9. Montgomery County
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- Tornadoes since 2000: 12 (2.90 per 100 square miles)
- #545 nationally
- Tornadoes this year, as of May 31: 0
- #545 nationally
- Tornadoes this year, as of May 31: 0
#8. Greene County
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- Tornadoes since 2000: 14 (3.10 per 100 square miles)
- #461 nationally
- Tornadoes this year, as of May 31: 1
- #461 nationally
- Tornadoes this year, as of May 31: 1
#7. Clermont County
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- Tornadoes since 2000: 16 (3.27 per 100 square miles)
- #395 nationally
- Tornadoes this year, as of May 31: 0
- #395 nationally
- Tornadoes this year, as of May 31: 0
#6. Brown County
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- Tornadoes since 2000: 15 (3.74 per 100 square miles)
- #279 nationally
- Tornadoes this year, as of May 31: 4
- #279 nationally
- Tornadoes this year, as of May 31: 4
#5. Auglaize County
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- Tornadoes since 2000: 16 (3.92 per 100 square miles)
- #244 nationally
- Tornadoes this year, as of May 31: 0
- #244 nationally
- Tornadoes this year, as of May 31: 0
#4. Clinton County
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- Tornadoes since 2000: 17 (4.28 per 100 square miles)
- #189 nationally
- Tornadoes this year, as of May 31: 1
- #189 nationally
- Tornadoes this year, as of May 31: 1
#3. Clark County
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- Tornadoes since 2000: 19 (4.67 per 100 square miles)
- #131 nationally
- Tornadoes this year, as of May 31: 2
- #131 nationally
- Tornadoes this year, as of May 31: 2
#2. Miami County
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- Tornadoes since 2000: 28 (6.84 per 100 square miles)
- #27 nationally
- Tornadoes this year, as of May 31: 1
- #27 nationally
- Tornadoes this year, as of May 31: 1
#1. Van Wert County
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