| Runs |
Out of |
4s |
6s |
| 104 | 135 | 14 | 8 | | KS Carlson | Glamorgan v Somerset | Sophia Gardens, Cardiff | 2024 |
| 90 | 113* | 12 | 7 | | CB Cooke | Glamorgan v Middlesex | Merchant Taylors' School Ground, Northwood | 2023 |
| 86 | 116* | 11 | 7 | | IJ Thomas | Glamorgan v Somerset | County Ground, Taunton | 2004 |
| 74 | 105 | 14 | 3 | | J Allenby | Glamorgan v Middlesex | Old Deer Park, Richmond | 2014 |
| 86 | 114 | 8 | 9 | | CA Ingram | Glamorgan v Essex | The Cloudfm County Ground, Chelmsford | 2017 |
| 68 | 98 | 14 | 2 | | HH Gibbs | Glamorgan v Northamptonshire | County Ground, Northampton | 2008 |
| 64 | 89 | 13 | 2 | | MJ Cosgrove | Glamorgan v Essex | The Ford County Ground, Chelmsford | 2010 |
| 72 | 96 | 9 | 6 | | CA Ingram | Glamorgan v Somerset | County Ground, Taunton | 2015 |
| 74 | 101* | 8 | 7 | | CA Ingram | Glamorgan v Sussex | Arundel Castle Cricket Club Ground, Arundel | 2017 |
| 66 | 89 | 12 | 3 | | SA Northeast | Glamorgan v Middlesex | Sophia Gardens, Cardiff | 2022 |
| 64 | 97* | 10 | 4 | | DL Lloyd | Glamorgan v Kent | The SSE SWALEC Stadium, Cardiff | 2016 |
| 66 | 89 | 9 | 5 | | CA Ingram | Glamorgan v Essex | Sophia Gardens, Cardiff | 2018 |
| 62 | 99* | 11 | 3 | | A Balbirnie | Glamorgan v Gloucestershire | Sophia Gardens, Cardiff | 2020 |
| 64 | 97* | 10 | 4 | | SA Northeast | Glamorgan v Essex | The Cloud County Ground, Chelmsford | 2022 |
| 66 | 77 | 9 | 5 | | KS Carlson | Glamorgan v Middlesex | Sophia Gardens, Cardiff | 2023 |
| 60 | 85 | 9 | 4 | | SE Marsh | Glamorgan v Somerset | County Ground, Taunton | 2012 |
| 64 | 91 | 7 | 6 | | CA Ingram | Glamorgan v Surrey | The Kia Oval, Kennington | 2015 |
| 52 | 101* | 13 | 0 | | JA Rudolph | Glamorgan v Gloucestershire | County Ground, Bristol | 2015 |
| 52 | 77 | 13 | 0 | | JA Rudolph | Glamorgan v Hampshire | The Ageas Bowl, Southampton | 2015 |
| 56 | 81 | 11 | 2 | | DL Lloyd | Glamorgan v Sussex | The SSE SWALEC Stadium, Cardiff | 2016 |
| 66 | 101 | 6 | 7 | | CA Ingram | Glamorgan v Essex | The Essex County Ground, Chelmsford | 2016 |
| 56 | 76 | 11 | 2 | | AHT Donald | Glamorgan v Surrey | The Kia Oval, Kennington | 2017 |
| 64 | 92* | 7 | 6 | | CA Ingram | Glamorgan v Middlesex | Merchant Taylors' School Ground, Northwood | 2023 |
| 50 | 65* | 11 | 1 | | CB Cooke | Glamorgan v Sussex | The SWALEC Stadium, Cardiff | 2014 |
| 54 | 96* | 9 | 3 | | J Allenby | Glamorgan v Somerset | County Ground, Taunton | 2014 |
| 52 | 93* | 10 | 2 | | M Labuschagne | Glamorgan v Gloucestershire | Sophia Gardens, Cardiff | 2021 |
| 52 | 75 | 10 | 2 | | CA Ingram | Glamorgan v Middlesex | Sophia Gardens, Cardiff | 2021 |
| 52 | 67 | 10 | 2 | | DL Lloyd | Glamorgan v Middlesex | Sophia Gardens, Cardiff | 2022 |
| 54 | 87 | 9 | 3 | | KS Carlson | Glamorgan v Sussex | The 1st Central County Ground, Hove | 2024 |
| 48 | 69 | 9 | 2 | | MP Maynard | Glamorgan v Gloucestershire | County Ground, Bristol | 2003 |
| 50 | 63 | 8 | 3 | | BB McCullum | Glamorgan v Worcestershire | Sophia Gardens, Cardiff | 2006 |
| 52 | 69* | 7 | 4 | | JEC Franklin | Glamorgan v Warwickshire | Edgbaston, Birmingham | 2006 |
| 54 | 77 | 6 | 5 | | RN Grant | Glamorgan v Gloucestershire | Sophia Gardens, Cardiff | 2006 |
| 48 | 76* | 9 | 2 | | HH Gibbs | Glamorgan v Somerset | County Ground, Taunton | 2008 |
| 48 | 75 | 9 | 2 | | MJ Cosgrove | Glamorgan v Somerset | County Ground, Taunton | 2010 |
| 52 | 81* | 7 | 4 | | CA Ingram | Glamorgan v Sussex | Sophia Gardens, Cardiff | 2018 |
| 50 | 78 | 8 | 3 | | NJ Selman | Glamorgan v Worcestershire | Blackfinch New Road, Worcester | 2020 |
| 46 | 68 | 10 | 1 | | DL Lloyd | Glamorgan v Gloucestershire | Sophia Gardens, Cardiff | 2022 |
| 46 | 63* | 10 | 1 | | CA Ingram | Glamorgan v Kent | Sophia Gardens, Cardiff | 2023 |
| 48 | 76 | 9 | 2 | | SA Northeast | Glamorgan v Surrey | Sophia Gardens, Cardiff | 2023 |
| 56 | 93 | 5 | 6 | | KS Carlson | Glamorgan v Essex | Sophia Gardens, Cardiff | 2025 |
