Highest Partnerships Against Middlesex By Glamorgan
| 1 | 118 | SP James & H Morris | Lord's Cricket Ground, St John's Wood | 1992 | a7511 |
| 2 | 172 | | Sophia Gardens, Cardiff | 1993 | a8112 |
| 3 | 181 | RDB Croft & SP James | Sophia Gardens, Cardiff | 2001 | a13716 |
| 4 | 156* | MJ North & J Allenby | Lord's Cricket Ground, St John's Wood | 2013 | a22600 |
| 5 | 93 | MJ Powell & DD Cherry | Lord's Cricket Ground, St John's Wood | 2005 | a16832 |
| 6 | 61 | | Sophia Gardens, Cardiff | 1977 | a2034 |
| 7 | 62 | SP James & AD Shaw | Lord's Cricket Ground, St John's Wood | 2000 | a12755 |
| 8 | 29 | | Sophia Gardens, Cardiff | 1995 | a9359 |
| 9 | 52 | | Sophia Gardens, Cardiff | 1998 | a11164 |
| 10 | 15 | RN Grant & DA Cosker | Sophia Gardens, Cardiff | 2005 | a16749 |
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