| School | HMC Division | Membership | Location | Age Range |
| Wells Cathedral School | South West (UK) | British Isles | Wells, United KIngdom | 2 - 18 |
| Wesgreen International School | International | International | Sharjah, United Arab Emirates | 4 - 18 |
| West Buckland School | South West (UK) | British Isles | Barnstaple, United Kingdom | 3 - 18 |
| Westminster School | London (UK) | British Isles | Westminster, London, United Kingdom | 13 - 18 |
| Whitgift School | London (UK) | British Isles | South Croydon, Surrey, United Kingdom | 10 - 18 |
| Wimbledon High School | London (UK) | British Isles | Wimbledon, London, United Kingdom | 4 - 18 |
| Winchester College | South Central (UK) | British Isles | Winchester, United Kingdom | 13 - 18 |
| Wisbech Grammar School | East (UK) | British Isles | Wisbech, United Kingdom | 11 - 18 |
| Withington Girls’ School | North West (UK) | British Isles | Manchester, United Kingdom | 7 - 18 |
| Woldingham School | South East (UK) | British Isles | Caterham, United Kingdom | 11 - 18 |
| Wolverhampton Grammar School | West (UK) | British Isles | Wolverhampton, United Kingdom | 4 - 18 |
| Woodbridge School | East (UK) | British Isles | Woodbridge, United Kingdom | 4 - 18 |
| Woodhouse Grove School | North East (UK) | British Isles | Bradford, United Kingdom | 2 - 18 |
| Worksop College | North East (UK) | British Isles | Worksop, United Kingdom | 3 - 18 |
| Worth School | South East (UK) | British Isles | Crawley, United Kingdom | 11 - 18 |
| Wrekin College | West (UK) | British Isles | Wellington, United Kingdom | 11 - 18 |
| Wycliffe College | West (UK) | British Isles | Stonehouse, United Kingdom | 13 - 18 |
| Wycombe Abbey | London (UK) | British Isles | High Wycombe, United Kingdom | 11 - 18 |
| Yarm School | North East (UK) | British Isles | Yarm, United Kingdom | 3 - 18 |
Wells Cathedral School
Age range
2 - 18
Location
15, The Liberty, Wells, Somerset, BA5 2ST, United KIngdom
Head’s name
Alastair Tighe
Wesgreen International School
Age range
4 - 18
Location
Al Muweilah Commercial Sharjah, United Arab Emirates
Head’s name
James McDonald
West Buckland School
Age range
3 - 18
Location
Barnstaple, North Devon, EX32 0SX, United Kingdom
Head’s name
Phillip Stapleton
Westminster School
Age range
13 - 18
Location
17 Dean's Yard, Westminster, London, SW1P 3PB, United Kingdom
Head’s name
Gary Savage
Whitgift School
Age range
10 - 18
Location
Haling Park, Croydon, Surrey, CR2 6YT, United Kingdom
Head’s name
Andrew Halls
Wimbledon High School
Age range
4 - 18
Location
Mansel Road, Wimbledon, Greater London, SW19 4AB, United Kingdom
Head’s name
Fionnuala Kennedy
Winchester College
Age range
13 - 18
Location
College Street, Winchester, SO23 9NA, United Kingdom
Head’s name
Elizabeth Stone
Wisbech Grammar School
Age range
11 - 18
Location
Wisbech, Cambridgeshire, PE13 1RH, United Kingdom
Head’s name
Barney Rimmer
Withington Girls’ School
Age range
7 - 18
Location
Wellington Road, Manchester, Greater Manchester, M14 6BL, United Kingdom
Head’s name
Sarah Haslam
Woldingham School
Age range
11 - 18
Location
Marden Park, Caterham, Surrey, CR3 7YA, United Kingdom
Head’s name
Sue Baillie
Wolverhampton Grammar School
Age range
4 - 18
Location
Compton Road, Wolverhampton, WV3 9RB, United Kingdom
Head’s name
Nic Anderson
Woodbridge School
Age range
4 - 18
Location
Burkitt Road, Woodbridge, Suffolk, IP12 4JH, United Kingdom
Head’s name
Shona Norman
Woodhouse Grove School
Age range
2 - 18
Location
Apperley Bridge, Bradford, West Yorkshire, BD10 0NR, United Kingdom
Head’s name
James Lockwood
Worksop College
Age range
3 - 18
Location
Cuthbert's Avenue, Worksop, Nottinghamshire, S80 3AP, United Kingdom
Head’s name
John Price
Worth School
Age range
11 - 18
Location
Paddockhurst Road, Crawley, West Sussex, RH10 4SD, United Kingdom
Head’s name
Stuart McPherson
Wrekin College
Age range
11 - 18
Location
Sutherland Road, Wellington, Telford, TF1 3BH, United Kingdom
Head’s name
Toby Spence
Wycliffe College
Age range
13 - 18
Location
Bath Road, Gloucestershire, GL10 2JQ, United Kingdom
Head’s name
Christian San Jose
Wycombe Abbey
Age range
11 - 18
Location
Frances Dove Way, High Wycombe, Buckinghamshire, HP11 1PE, United Kingdom
Head’s name
Jo Duncan
Yarm School
Age range
3 - 18
Location
The Friarage, Yarm, North Yorkshire, TS15 9EJ, United Kingdom
Head’s name
Huw Williams