| 6-23 | Mumtaz Habibullah | Harrow Wanderers v St Edward's Martyrs | St Edward's School Ground, Oxford | 2012 |
| 6-35 | NJW Stewart | Harrow Wanderers v Old Blundellians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1985 |
| 5-10 | SE Haggas | Harrow Wanderers v Old Cheltonians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1990 |
| 5-15 | J Halliday | Harrow Wanderers v Oundle Rovers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1975 |
| 5-15 | NJW Stewart | Harrow Wanderers v Downside Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1982 |
| 5-23 | I Coomaraswamy | Harrow Wanderers v Old Cliftonians | Clifton College Close Ground, Clifton | 1994 |
| 5-26 | J Halliday | Harrow Wanderers v Uppingham Rovers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1975 |
| 5-28 | EW Nicol | Harrow Wanderers v Shrewsbury Saracens | Harrow School Cricket Ground, Harrow-on-the-Hill | 2001 |
| 5-30 | RCS Titchener-Barrett | Harrow Wanderers v Old Brightonians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1976 |
| 5-31 | JT Nelson | Harrow Wanderers v Downside Wanderers | Downside School, Stratton-on-the-Fosse | 2024 |
| 5-32 | JBK Roditi | Harrow Wanderers v Rugby Meteors | Rugby School Ground, Rugby | 2010 |
| 5-35 | WE Stewart | Harrow Wanderers v Old Tonbridgians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1980 |
| 5-36 | ACS Pigott | Harrow Wanderers v Old Tonbridgians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1980 |
| 5-39 | I Coomaraswamy | Harrow Wanderers v Radley Rangers | Radley College Bigside Ground, Abingdon | 1981 |
| 4-? | RM Tindall | Harrow Wanderers v Eton Ramblers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1979 |
| 4-? | RC Patrick | Harrow Wanderers v Eton Ramblers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1987 |
| 4-8 | MR Middleton | Harrow Wanderers v Shrewsbury Saracens | Harrow School Cricket Ground, Harrow-on-the-Hill | 2001 |
| 4-15 | TMH James | Harrow Wanderers v Old Cholmeleians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1982 |
| 4-17 | RH Woolley | Harrow Wanderers v St Edward's Martyrs | Harrow School Cricket Ground, Harrow-on-the-Hill | 1969 |
| 4-17 | JA Chohan | Harrow Wanderers v Old Cholmeleians | Harrow School Cricket Ground, Harrow-on-the-Hill | 2021 |
| 4-18 | RD Nelson | Harrow Wanderers v Rugby Meteors | Rugby School Ground, Rugby | 2012 |
| 4-25 | C Nelson | Harrow Wanderers v Old Wellingtonians | Wellington College, Crowthorne | 2025 |
| 4-28 | DBM Fox | Harrow Wanderers v Old Merchant Taylors | Harrow School Cricket Ground, Harrow-on-the-Hill | 1991 |
| 4-30 | MMJ Hawkins | Harrow Wanderers v Old Cheltonians | College Ground, Cheltenham | 1997 |
| 4-31 | TMH James | Harrow Wanderers v Downside Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1990 |
| 4-32 | CAR Halliday | Harrow Wanderers v Marlborough Blues | Harrow School Cricket Ground, Harrow-on-the-Hill | 1975 |
| 4-32 | AC Smith | Harrow Wanderers v Old Brightonians | Harrow School Cricket Ground, Harrow-on-the-Hill | 2015 |
| 4-35 | RD Nelson | Harrow Wanderers v Shrewsbury Saracens | Shrewsbury School, Shrewsbury | 1996 |
| 4-38 | WR Worthy | Harrow Wanderers v Old Cliftonians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1998 |
| 4-39 | DC Manasseh | Harrow Wanderers v Haileybury Hermits | Harrow School Cricket Ground, Harrow-on-the-Hill | 1998 |
| 4-40 | RH Woolley | Harrow Wanderers v Radley Rangers | Radley College Bigside Ground, Abingdon | 1968 |
| 4-41 | WS Jones | Harrow Wanderers v Old Brightonians | Brighton College Ground, Brighton | 2013 |
| 4-42 | RS Wijeratne | Harrow Wanderers v Shrewsbury Saracens | Shrewsbury School, Shrewsbury | 2022 |
| 4-49 | RCS Titchener-Barrett | Harrow Wanderers v Old Malvernians | Burton's Court, Chelsea | 1975 |
| 4-54 | RA Pyman | Harrow Wanderers v Old Cheltonians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1995 |
| 4-56 | Mumtaz Habibullah | Harrow Wanderers v Old Malvernians | Harrow School Cricket Ground, Harrow-on-the-Hill | 2010 |
