| Wkt |
| 2 | 213 | L Bose (219) & A Rath (86) | Harrow Wanderers v Old Alleynians | Dulwich College Ground, Dulwich | 2022 |
| 4 | 167 | ML Sealy (74) & EC Gordon-Lennox (92) | Harrow Wanderers v Old Tonbridgians | Tonbridge School Ground, Tonbridge | 1990 |
| 2 | 165* | L Bose (92*) & A Rath (98*) | Harrow Wanderers v Old Merchant Taylors | Merchant Taylors' School Ground, Northwood | 2018 |
| 6 | 148 | [unknown] & [unknown] | Harrow Wanderers v Radley Rangers | Radley College Bigside Ground, Abingdon | 1981 |
| 1 | 147 | L Rafferty (36) & HM Morrison (123) | Harrow Wanderers v Rugby Meteors | Rugby School Ground, Rugby | 2010 |
| 3 | 144 | CL Keey (79) & HSJR Foster (92) | Harrow Wanderers v Haileybury Hermits | Harrow School Cricket Ground, Harrow-on-the-Hill | 1998 |
| 1 | 132 | SDG Engelen (49) & TG Dunbar (76) | Harrow Wanderers v Old Whitgiftians | Whitgift School, Croydon | 2003 |
| 2 | 126 | TG Dunbar (54) & RMW Norris (91) | Harrow Wanderers v Repton Pilgrims | Harrow School Cricket Ground, Harrow-on-the-Hill | 2004 |
| 4 | 125 | L Bose (219) & SJS Assani (54) | Harrow Wanderers v Old Alleynians | Dulwich College Ground, Dulwich | 2022 |
| 4 | 116 | [unknown] & [unknown] | Harrow Wanderers v Old Cholmeleians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1992 |
| 7 | 116 | AW Sexton (56) & RA Pyman (52) | Harrow Wanderers v Old Cliftonians | Clifton College Close Ground, Clifton | 1994 |
| 1 | 114 | RD Nelson (116*) & JDS Fricker (37) | Harrow Wanderers v Old Malvernians | Harrow School Cricket Ground, Harrow-on-the-Hill | 1996 |
| 2 | 111 | SE Haggas (92) & CL Keey (65) | Harrow Wanderers v Old Cheltonians | College Ground, Cheltenham | 1997 |
| 1 | 107* | JA Jordache (45*) & LHB Harrington-Myers (58*) | Harrow Wanderers v Old Cholmeleians | Harrow School Cricket Ground, Harrow-on-the-Hill | 2021 |
| 4 | 106 | ANL Cox (81) & RM Tindall (34*) | Harrow Wanderers v Felsted Robins | Felsted School Ground, Dunmow | 1998 |
| 3 | 106 | LF de Rougemont (75) & ANL Cox (49) | Harrow Wanderers v Shrewsbury Saracens | Shrewsbury School, Shrewsbury | 2003 |
| 1 | 104 | RD Nelson (68) & JDS Fricker (29) | Harrow Wanderers v Shrewsbury Saracens | Shrewsbury School, Shrewsbury | 1996 |
| 2 | 103 | SDG Engelen (69) & LF de Rougemont (43) | Harrow Wanderers v Repton Pilgrims | Repton School Ground, Repton | 2003 |
| 5 | 100 | CL Keey (91) & SE Haggas (55) | Harrow Wanderers v Old Merchant Taylors | Harrow School Cricket Ground, Harrow-on-the-Hill | 1993 |
| 5 | 99 | CAS Abraham (96) & RAJ Hills (41) | Harrow Wanderers v Repton Pilgrims | Repton School Ground, Repton | 2001 |
| 2 | 97 | [unknown] & [unknown] | Harrow Wanderers v Old Malvernians | Malvern College Ground, Malvern | 1982 |
| 5 | 95 | EC Gordon-Lennox (58) & SE Haggas (46) | Harrow Wanderers v Shrewsbury Saracens | Harrow School Cricket Ground, Harrow-on-the-Hill | 1993 |
| 1 | 95 | WJ Spencer (47) & L Bose (77) | Harrow Wanderers v Old Cliftonians | Clifton College Close Ground, Clifton | 2014 |
| 1 | 93 | CL Keey (38) & RD Nelson (43) | Harrow Wanderers v Marlborough Blues | Harrow School Cricket Ground, Harrow-on-the-Hill | 1994 |
| 5 | 89* | RM Tindall (63*) & AW Sexton (56*) | Harrow Wanderers v Shrewsbury Saracens | Harrow School Cricket Ground, Harrow-on-the-Hill | 1997 |
| 3 | 88 | [unknown] & [unknown] | Harrow Wanderers v Sherborne Pilgrims | Sherborne School, Sherborne | 1985 |
| 4 | 88 | CL Keey (42) & RM Tindall (63*) | Harrow Wanderers v Shrewsbury Saracens | Harrow School Cricket Ground, Harrow-on-the-Hill | 1997 |
| 7 | 88* | ANL Cox (45*) & PR Dunbar (40*) | Harrow Wanderers v Felsted Robins | Harrow School Cricket Ground, Harrow-on-the-Hill | 2005 |
| 4 | 87 | [unknown] & [unknown] | Harrow Wanderers v Old Cheltonians | Harrow School Cricket Ground, Harrow-on-the-Hill | 2012 |
| 7 | 84 | EC Gordon-Lennox (90*) & JFP Lloyd-Jones (35) | Harrow Wanderers v Downside Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1990 |
| 3 | 84 | ANL Cox (72) & CGM Travers (44) | Harrow Wanderers v Old Cheltonians | College Ground, Cheltenham | 2008 |
