| 1 | 130* | PW Denning & MJ Kitchen | Somerset v Surrey | 1978 | a2164 |
| 2 | 56 | Somerset v Glamorgan | 1977 | a1947 | |
| 3 | 100 | DB Close & GI Burgess | Somerset v Hampshire | 1972 | a686 |
| 4 | 117 | Somerset v Glamorgan | 1977 | a1947 | |
| 5 | 65 | Somerset v Hampshire | 1972 | a686 | |
| 6 | 40 | Lancashire v Somerset | 1971 | a498 | |
| 7 | 59 | Somerset v Essex | 1976 | a1669 | |
| 8 | 39 | Glamorgan v Somerset | 1973 | a907 | |
| 9 | 22* | Glamorgan v Somerset | 1973 | a907 | |
| 10 | 18 | Glamorgan v Somerset | 1977 | a1947 |