Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| Guardian Savings Bank | West Chester, OH | 01-01-1895 | $1,356,947 | BK |
| TELHIO | Columbus, OH | 01-01-1935 | $1,354,545 | CU |
| The Merchants National Bank | Hillsboro, OH | 12-25-1879 | $1,320,880 | BK |
| The Croghan Colonial Bank | Fremont, OH | 07-25-1888 | $1,314,050 | BK |
| Signature Bank, National Association | Toledo, OH | 04-02-2002 | $1,305,556 | BK |
| The Commercial and Savings Bank of Millersburg, Ohio | Millersburg, OH | 01-01-1879 | $1,292,368 | BK |
| The Richwood Banking Company | Richwood, OH | 07-01-1867 | $1,235,216 | BK |
| Consumers National Bank | Minerva, OH | 09-01-1965 | $1,211,874 | BK |
| The Union Bank Company | Columbus Grove, OH | 11-21-1904 | $1,189,863 | BK |
| The North Side Bank and Trust Company | Cincinnati, OH | 01-01-1892 | $1,180,148 | BK |
| First State Bank | Winchester, OH | 01-01-1934 | $1,151,176 | BK |
| Liberty Savings Bank, F.S.B. | Wilmington, OH | 09-14-1984 | $1,107,903 | BK |
| The Citizens National Bank of Bluffton | Bluffton, OH | 01-13-1920 | $1,076,098 | BK |
| The Killbuck Savings Bank Company | Killbuck, OH | 01-01-1900 | $914,550 | BK |
| DAY AIR | Kettering, OH | 01-01-1944 | $890,627 | CU |