Ohio earthquake risk
Franklin County has the highest earthquake risk in Ohio, scoring 93.3 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Franklin County | 93.3 | Relatively Moderate |
| 2 | Hamilton County | 92.7 | Relatively Moderate |
| 3 | Montgomery County | 91.1 | Relatively Moderate |
| 4 | Cuyahoga County | 89.6 | Relatively Low |
| 5 | Lucas County | 88.1 | Relatively Low |
| 6 | Shelby County | 86.5 | Relatively Low |
| 7 | Butler County | 85.3 | Relatively Low |
| 8 | Allen County | 83.2 | Relatively Low |
| 9 | Miami County | 80.4 | Relatively Low |
| 10 | Greene County | 80.3 | Relatively Low |
| 11 | Darke County | 80.1 | Relatively Low |
| 12 | Clark County | 78.8 | Relatively Low |
| 13 | Stark County | 78.8 | Relatively Low |
| 14 | Clermont County | 78.4 | Relatively Low |
| 15 | Summit County | 78.3 | Relatively Low |
| 16 | Auglaize County | 77.2 | Relatively Low |
| 17 | Warren County | 75.5 | Relatively Low |
| 18 | Lorain County | 74.6 | Relatively Low |
| 19 | Mercer County | 73.8 | Relatively Low |
| 20 | Mahoning County | 73.3 | Relatively Low |
| 21 | Wood County | 69.8 | Relatively Low |
| 22 | Logan County | 69.2 | Relatively Low |
| 23 | Trumbull County | 69.2 | Relatively Low |
| 24 | Marion County | 69.1 | Relatively Low |
| 25 | Delaware County | 66.2 | Relatively Low |
| 26 | Licking County | 65.9 | Relatively Low |
| 27 | Brown County | 65.8 | Relatively Low |
| 28 | Clinton County | 65.4 | Relatively Low |
| 29 | Preble County | 63.2 | Relatively Low |
| 30 | Williams County | 63 | Relatively Low |
| 31 | Scioto County | 62.6 | Relatively Low |
| 32 | Sandusky County | 62.2 | Relatively Low |
| 33 | Erie County | 62.1 | Relatively Low |
| 34 | Highland County | 62 | Relatively Low |
| 35 | Lake County | 60.9 | Relatively Low |
| 36 | Hancock County | 60.6 | Relatively Low |
| 37 | Fulton County | 58.7 | Very Low |
| 38 | Fayette County | 57.7 | Very Low |
| 39 | Fairfield County | 57.2 | Very Low |
| 40 | Seneca County | 57.1 | Very Low |
| 41 | Van Wert County | 57 | Very Low |
| 42 | Wayne County | 56.5 | Very Low |
| 43 | Champaign County | 56.2 | Very Low |
| 44 | Richland County | 56.2 | Very Low |
| 45 | Madison County | 55.6 | Very Low |
| 46 | Tuscarawas County | 54.9 | Very Low |
| 47 | Ashtabula County | 54.7 | Very Low |
| 48 | Pickaway County | 54 | Very Low |
| 49 | Ross County | 53.8 | Very Low |
| 50 | Putnam County | 53.6 | Very Low |
| 51 | Portage County | 53.3 | Very Low |
| 52 | Henry County | 53 | Very Low |
| 53 | Ottawa County | 52.9 | Very Low |
| 54 | Defiance County | 52.6 | Very Low |
| 55 | Huron County | 52.6 | Very Low |
| 56 | Crawford County | 52 | Very Low |
| 57 | Muskingum County | 51.8 | Very Low |
| 58 | Paulding County | 50.3 | Very Low |
| 59 | Adams County | 49.4 | Very Low |
| 60 | Hardin County | 48.9 | Very Low |
| 61 | Athens County | 48.8 | Very Low |
| 62 | Lawrence County | 48.7 | Very Low |
| 63 | Union County | 48.6 | Very Low |
| 64 | Knox County | 48.5 | Very Low |
| 65 | Medina County | 47.6 | Very Low |
| 66 | Washington County | 47.1 | Very Low |
| 67 | Jefferson County | 46.3 | Very Low |
| 68 | Geauga County | 46.2 | Very Low |
| 69 | Jackson County | 45.5 | Very Low |
| 70 | Wyandot County | 45.5 | Very Low |
| 71 | Ashland County | 43.9 | Very Low |
| 72 | Gallia County | 43.3 | Very Low |
| 73 | Pike County | 43.3 | Very Low |
| 74 | Columbiana County | 42.5 | Very Low |
| 75 | Holmes County | 41.9 | Very Low |
| 76 | Belmont County | 41.3 | Very Low |
| 77 | Meigs County | 40.2 | Very Low |
| 78 | Morrow County | 39.9 | Very Low |
| 79 | Guernsey County | 38.5 | Very Low |
| 80 | Perry County | 36.2 | Very Low |
| 81 | Hocking County | 34.6 | Very Low |
| 82 | Monroe County | 33 | Very Low |
| 83 | Coshocton County | 32.1 | Very Low |
| 84 | Noble County | 28.7 | Very Low |
| 85 | Vinton County | 28.1 | Very Low |
| 86 | Carroll County | 27 | Very Low |
| 87 | Morgan County | 24.7 | Very Low |
| 88 | Harrison County | 23.8 | Very Low |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Earthquake risk nationally:
Other hazard risks in Ohio:
Frequently asked questions
What is the highest earthquake risk county in Ohio?
Franklin County, OH has the highest earthquake risk in Ohio, with a FEMA National Risk Index score of 93.3 out of 100 (rated "Relatively Moderate").
What causes earthquake risk in Ohio?
Earthquake risk reflects expected annual losses from ground shaking. High scores concentrate in California, the Pacific Northwest, Alaska, and the New Madrid Seismic Zone (spanning Missouri, Arkansas, Tennessee, and neighboring states). NOAA's Storm Events Database does not track earthquakes, so recorded event counts are not shown.