| Inns | HS |
| 333-6 | 83 | Old Cheltonians v Old Merchant Taylors | Merchant Taylors' School Ground, Northwood | 2022 |
| 317 | 93 | Old Cheltonians v Shrewsbury Saracens | Shrewsbury School, Shrewsbury | 2022 |
| 313-7 | 75 | Old Cheltonians v Marlborough Blues | College Ground, Cheltenham | 2023 |
| 301 | 83 | Old Cheltonians v Old Wykehamists | Ridding Field, Winchester | 2025 |
| 284-7 | 91 | Old Cheltonians v Old Amplefordians | Ampleforth College, Ampleforth | 2022 |
| 283 | 63 | Old Cheltonians v Old Wellingtonians | College Ground, Cheltenham | 1995 |
| 279-6 | 78 | Old Cheltonians v Old Amplefordians | College Ground, Cheltenham | 2001 |
| 267-7 | 63 | Old Cheltonians v Stowe Templars | Stowe School Ground, Stowe | 2015 |
| 262 | 87 | Old Cheltonians v Old Alleynians | College Ground, Cheltenham | 2007 |
| 257-7 | 71 | Old Cheltonians v Eton Ramblers | Upper Club, Eton College | 2006 |
| 254-8 | 49* | Old Cheltonians v Eton Ramblers | College Ground, Cheltenham | 2013 |
| 252 | 88 | Old Cheltonians v Harrow Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 2012 |
| 251 | 71 | Old Cheltonians v Old Cholmeleians | College Ground, Cheltenham | 2003 |
| 251-8 | 76 | Old Cheltonians v Downside Wanderers | Downside School, Stratton-on-the-Fosse | 2021 |
| 248 | 65 | Old Cheltonians v Old Millfieldians | Millfield School, Street | 2023 |
| 246-6 | 87* | Old Cheltonians v Lancing Rovers | Lancing College Ground, Lancing | 1997 |
| 244-8 | 57 | Old Cheltonians v Old Cranleighans | Jubilee, Cranleigh School | 2014 |
| 241-8 | 72 | Old Cheltonians v Old Brightonians | Brighton College Ground, Brighton | 1999 |
| 241 | 60 | Old Cheltonians v Marlborough Blues | Marlborough College Ground, Marlborough | 2017 |
| 234-9 | 82 | Old Cheltonians v Marlborough Blues | College Ground, Cheltenham | 1993 |
| 231 | 84 | Old Cheltonians v Oundle Rovers | Oundle School Ground, Oundle | 2001 |
| 221 | 70 | Old Cheltonians v Old Wykehamists | Ridding Field, Winchester | 1993 |
| 221 | 87 | Old Cheltonians v Bradfield Waifs | College Ground, Cheltenham | 2022 |
| 219-7 | 73 | Old Cheltonians v Repton Pilgrims | Repton School Ground, Repton | 2012 |
| 218-9 | 64 | Old Cheltonians v Haileybury Hermits | Haileybury College Ground, Hertford | 1977 |
| 205 | 66 | Old Cheltonians v Old Tonbridgians | College Ground, Cheltenham | 1991 |
| 205 | 42 | Old Cheltonians v Old Wellingtonians | Wellington College, Crowthorne | 2008 |
| 202-9 | 52 | Old Cheltonians v Harrow Wanderers | College Ground, Cheltenham | 2014 |
| 201 | 90 | Old Cheltonians v Old Alleynians | College Ground, Cheltenham | 2013 |
| 200-9 | 85 | Old Cheltonians v Old Amplefordians | Ampleforth College, Ampleforth | 1988 |
