| 206 | AGH Orr | Sussex v Somerset | 2022 | a29400 |
| 184 | ME Trescothick | Somerset v Gloucestershire | 2008 | a19125 |
| 183 | SC Ganguly | India v Sri Lanka | 1999 | a11946 |
| 165* | RE van der Merwe | Somerset v Surrey | 2017 | a25488 |
| 159 | JC Hildreth | Somerset v Glamorgan | 2018 | a26416 |
| 157 | BGF Green | Somerset v Durham | 2022 | a29355 |
| 156 | RR Rossouw | Hampshire v Somerset | 2017 | a25564 |
| 154* | MJ Procter | Gloucestershire v Somerset | 1972 | a710 |
| 154 | BRM Taylor | Nottinghamshire v Somerset | 2017 | a25664 |
| 151 | JC Hildreth | Somerset v Scotland | 2009 | a19793 |