State Automobile Mutual Insurance Company
| Company type | Public company |
|---|---|
| NASDAQ, STFC | |
| Industry | Insurance |
| Founded | 16 September 1921 |
| Founder | Robert Pein |
| Headquarters | 518 East Broad Street, |
| Owner | Liberty Mutual |
State Automobile Mutual Insurance Company, commonly shortened to State Auto Mutual or State Auto, is an American insurance company based in Columbus, Ohio. It was incorporated in 1921 as the first casualty insurance company to be headquartered in Columbus. In 2022, it was acquired by Liberty Mutual for approximately $1 billion.