Here are the 50 largest auto insurance companies in Ohio, based on the amount of premiums for policies they sold in the state in 2018.
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Largest auto insurance companies in Ohio
| Rank in Ohio | Company | Market share % in Ohio |
|---|---|---|
| 1 | State Farm | 18.66 |
| 2 | Progressive | 14.76 |
| 3 | Allstate Corp. | 10.43 |
| 4 | Berkshire Hathaway Inc. | 7.57 |
| 5 | Nationwide | 7.21 |
| 6 | Grange Insurance | 5 |
| 7 | Liberty Mutual | 4.56 |
| 8 | Erie Insurance | 3.59 |
| 9 | USAA | 3.01 |
| 10 | American Family Insurance | 2.79 |
| 11 | Westfield Insurance | 2.53 |
| 12 | The Cincinnati Insurance Cos. | 1.92 |
| 13 | Auto-Owners Insurance | 1.76 |
| 14 | Farmers Insurance | 1.58 |
| 15 | Travelers | 1.34 |
| 16 | Safe Auto Insurance Group Inc. | 1.13 |
| 17 | Ohio Mutual Insurance Group | 1.08 |
| 18 | Western Reserve Group | 1.02 |
| 19 | Encova Insurance | 0.99 |
| 20 | State Auto | 0.91 |
| 21 | MetLife | 0.8 |
| 22 | The Hartford | 0.54 |
| 23 | Central Insurance Companies | 0.41 |
| 24 | Pekin Insurance | 0.39 |
| 25 | Alfa Mutual Group | 0.39 |
| 26 | Utica National Insurance Group | 0.38 |
| 27 | Sentry | 0.36 |
| 28 | Celina Insurance | 0.31 |
| 29 | National General Holdings Corp. | 0.3 |
| 30 | First Acceptance | 0.3 |
| 31 | American National | 0.29 |
| 32 | Auto Club Insurance Association | 0.29 |
| 33 | Wayne Mutual Insurance Co. | 0.26 |
| 34 | Hastings Mutual Insurance Co. | 0.26 |
| 35 | CSAA Insurance Exchange | 0.23 |
| 36 | The Hanover Insurance Group | 0.23 |
| 37 | Amica | 0.2 |
| 38 | Chubb | 0.19 |
| 39 | Goodville & German Mutual Group | 0.19 |
| 40 | Markel | 0.17 |
| 41 | Donegal | 0.15 |
| 42 | MAPFRE | 0.15 |
| 43 | Grinnell Mutual | 0.14 |
| 44 | Frankenmuth Insurance | 0.13 |
| 45 | Root Insurance Co. | 0.13 |
| 46 | Buckeye Insurance | 0.12 |
| 47 | California Casualty | 0.11 |
| 48 | ACUITY A Mutual Insurance Co. | 0.1 |
| 49 | Selective | 0.09 |
| 50 | Kemper | 0.08 |
| Source: S&P Global Market Intelligence, based on premiums written in 2018 for private passenger auto insurance. | ||