| 1 | 175 | AH Dyson & DE Davies | Glamorgan v Sussex | 1939 | f16599 |
| 2 | 107 | Glamorgan v Derbyshire | 1957 | f21923 | |
| 3 | 362* | Saeed Anwar & Inzamam-ul-Haq | Pakistanis v Glamorgan | 1996 | f42480 |
| 4 | 141 | DL Hemp & PA Cottey | Glamorgan v South Africans | 1994 | f41226 |
| 5 | 121 | Derbyshire v Glamorgan | 1953 | f20028 | |
| 6 | 130 | Glamorgan v Derbyshire | 1926 | f11638 | |
| 7 | 121 | Warwickshire v Glamorgan | 1937 | f15784 | |
| 8 | 70 | Hampshire v Glamorgan | 1990 | f38902 | |
| 9 | 80* | Essex v Glamorgan | 1955 | f20985 | |
| 10 | 58 | Somerset v Glamorgan | 1935 | f15060 | |
| 10 | 58 | Glamorgan v Worcestershire | 1960 | f23146 |