| 1 | 175 | AH Dyson & DE Davies | Glamorgan v Sussex | 1939 | f16595 |
| 2 | 107 | Glamorgan v Derbyshire | 1957 | f21919 | |
| 3 | 362* | Saeed Anwar & Inzamam-ul-Haq | Pakistanis v Glamorgan | 1996 | f42476 |
| 4 | 141 | DL Hemp & PA Cottey | Glamorgan v South Africans | 1994 | f41222 |
| 5 | 121 | Derbyshire v Glamorgan | 1953 | f20024 | |
| 6 | 130 | Glamorgan v Derbyshire | 1926 | f11634 | |
| 7 | 121 | Warwickshire v Glamorgan | 1937 | f15780 | |
| 8 | 70 | Hampshire v Glamorgan | 1990 | f38898 | |
| 9 | 80* | Essex v Glamorgan | 1955 | f20981 | |
| 10 | 58 | Somerset v Glamorgan | 1935 | f15056 | |
| 10 | 58 | Glamorgan v Worcestershire | 1960 | f23142 |