| School | HMC Division | Membership | Location | Age Range |
| Colfe’s School | London (UK) | British Isles | Lewisham, London, United Kingdom | 11 - 18 |
| Collegiate School Bristol | South West (UK) | British Isles | Bristol, United Kingdom | 11 - 18 |
| Coventry School Foundation | West (UK) | British Isles | Coventry, United Kingdom | 3 - 18 |
| Cranleigh School | South East (UK) | British Isles | Cranleigh, United Kingdom | 13 - 18 |
| Crofton House School | International | International | Vancouver, Canada | 4 - 18 |
| Culford School | East (UK) | British Isles | Bury St Edmunds, United Kingdom | 1 - 18 |
| Dame Allan’s Schools | North East (UK) | British Isles | Newcastle upon Tyne, United Kingdom | 3 - 18 |
| Dauntsey’s School | South West (UK) | British Isles | Devizes, United Kingdom | 11 - 18 |
| Deira International School | International | International | Dubai, United Arab Emirates | 3 - 18 |
| Denstone College | West (UK) | British Isles | Uttoxeter, United Kingdom | 4 - 18 |
| Derby High School | East (UK) | British Isles | Derby, United Kingdom | 3 - 18 |
| Doha College | International | International | Doha, Qatar | 3 - 18 |
| Dollar Academy | Scottish (UK) | British Isles | Dollar, United Kingdom | 3 - 18 |
| Downe House | South Central (UK) | British Isles | Thatcham, United Kingdom | 11 - 18 |
| Downside School | South West (UK) | British Isles | Bath, United Kingdom | 11 - 18 |
| Dubai College | International | International | Dubai, United Arab Emirates | 11 - 18 |
| Dulwich College | London (UK) | British Isles | Dulwich, London, United Kingdom | 0 - 18 |
| Dulwich College Singapore | International | International | Singapore, Singapore | 2 - 18 |
| Durham Cathedral Schools Foundation | North East (UK) | British Isles | Durham, United Kingdom | 3 - 18 |
| Eastbourne College | South East (UK) | British Isles | Eastbourne, United Kingdom | 13 - 18 |
| Edgbaston High School for Girls | West (UK) | British Isles | Birmingham, United Kingdom | 2 - 18 |
| Elizabeth College | South West (UK) | British Isles | St Peter Port, Guernsey | 3 - 18 |
| Ellesmere College | West (UK) | British Isles | Ellesmere, United Kingdom | 7 - 18 |
| Eltham College | London (UK) | British Isles | Eltham, London, United Kingdom | 7 - 18 |
| Emanuel School | London (UK) | British Isles | Battersea Rise, London, United Kingdom | 10 - 18 |
| Epsom College | South East (UK) | British Isles | Epsom, United Kingdom | 11 - 18 |
| Erskine Stewart Melville School | Scottish (UK) | British Isles | Edinburgh, United Kingdom | 3 - 18 |
| Eton College | South Central (UK) | British Isles | Windsor, United Kingdom | 13 - 18 |
| Ewell Castle School | South East (UK) | British Isles | Epsom, United Kingdom | 3 - 18 |
| Exeter School | South West (UK) | British Isles | Exeter, United Kingdom | 7 - 18 |
| Farringtons School | South East (UK) | British Isles | Chislehurst, United Kingdom | 3 - 18 |
| Felsted School | East (UK) | British Isles | Felsted, United Kingdom | 4 - 18 |
| Fettes College | Scottish (UK) | British Isles | Edinburgh, United Kingdom | 7 - 18 |
| Forest School | London (UK) | British Isles | Waltham Forest, London, United Kingdom | 4 - 18 |
| Framlingham College | East (UK) | British Isles | Framlingham, United Kingdom | 3 - 18 |
| Francis Holland, Regent’s Park | London (UK) | British Isles | Westminster, London, United Kingdom | 11 - 18 |
Colfe’s School
Age range
11 - 18
Location
Horn Park Lane, London, SE12 8AW, United Kingdom
Head’s name
Richard Russell
Collegiate School Bristol
Age range
11 - 18
Location
Bell Hill, Bristol, Avon, BS16 1BJ, United Kingdom
Head’s name
Jeremy McCullough
Coventry School Foundation
Age range
3 - 18
Location
15 Queen's Rd, Coventry, CV1 3EG, United Kingdom
Head’s name
Chris Staley
Cranleigh School
Age range
13 - 18
Location
Horseshoe Lane, Cranleigh, Surrey, GU6 8QQ, United Kingdom
Head’s name
Samantha Price
Crofton House School
Age range
4 - 18
Location
3200 West 4th Avenue, Vancouver, BC V6N 3E1, Canada
Head’s name
Ena Harrop
Culford School
Age range
1 - 18
Location
Culford, Bury St Edmunds, Suffolk, IP28 6TX, United Kingdom
Head’s name
Claire Bentley
Dame Allan’s Schools
Age range
3 - 18
Location
Hunter's Road, Spital Tongues, Newcastle upon Tyne, NE2 4NG, United Kingdom
Head’s name
Will Scott
Dauntsey’s School
Age range
11 - 18
Location
Dauntsey's School, West Lavington, Devizes, Wiltshire, SN10 4HE, United Kingdom
Head’s name
John Davies
Deira International School
Age range
3 - 18
Location
Al Badia, Dubai, 79043, United Arab Emirates
Head’s name
Simon O'Connor
Denstone College
Age range
4 - 18
Location
Denstone, Uttoxeter, Staffordshire, ST14 5HN, United Kingdom
Head’s name
Lotte Tulloch
Derby High School
Age range
3 - 18
Location
Hillsway, Littleover, Derby DE23 3DT
Head’s name
Amy Chapman
Doha College
Age range
3 - 18
Location
Al Niser Street, Doha, Qatar
Head’s name
David Tongue
Dollar Academy
Age range
3 - 18
Location
Dollar, Clackmannanshire, Scotland, FK14 7DU, United Kingdom
Head’s name
Ian Munro
Downe House
Age range
11 - 18
Location
Cold Ash, Thatcham, Berkshire, RG18 9JJ, United Kingdom
Head’s name
Emma McKendrick
Downside School
Age range
11 - 18
Location
Stratton on the Fosse, Bath, Somerset, BA3 4RJ, United Kingdom
Head’s name
Andrew Hobbs
Dubai College
Age range
11 - 18
Location
PO Box 837, Dubai, United Arab Emirates
Head’s name
Mike Lambert
Dulwich College
Age range
0 - 18
Location
Dulwich Common, London, SE21 7LD, United Kingdom
Head’s name
Fiona Angel
Dulwich College Singapore
Age range
2 - 18
Location
7 Bukit Batok West Avenue 8, Singapore
Head’s name
Nick Magnus
Durham Cathedral Schools Foundation
Age range
3 - 18
Location
Quarryheads Lane, Durham, DH1 4SZ, United Kingdom
Head’s name
Kieran McLaughlin
Eastbourne College
Age range
13 - 18
Location
Old Wish Road, Eastbourne, East Sussex, BN21 4JY, United Kingdom
Head’s name
Tom Lawson
Edgbaston High School for Girls
Age range
2 - 18
Location
Westbourne Road, Edgbaston, Birmingham, B15 3TS, United Kingdom
Head’s name
Clare Macro
Elizabeth College
Age range
3 - 18
Location
The Grange, St Peter Port, GY1 2PY, Guernsey
Head’s name
Jenny Palmer
Ellesmere College
Age range
7 - 18
Location
Ellesmere College, Ellesmere, Shropshire, SY12 9AB, United Kingdom
Head’s name
Vicky Pritt-Roberts
Eltham College
Age range
7 - 18
Location
Grove Park Road, London, SE9 4QF, United Kingdom
Head’s name
Guy Sanderson
Emanuel School
Age range
10 - 18
Location
Battersea Rise, London, SW11 1HS, United Kingdom
Head’s name
Robert Milne
Epsom College
Age range
11 - 18
Location
College Road, Epsom, Surrey, KT17 4JQ, United Kingdom
Head’s name
Mark Lascelles
Erskine Stewart Melville School
Age range
3 - 18
Location
Queensferry Road, Edinburgh, Midlothian, Scotland, EH4 3EZ, United Kingdom
Head’s name
Anthony Simpson
Eton College
Age range
13 - 18
Location
Windsor, Berkshire, SL4 6DW, United Kingdom
Head’s name
Paul Williams
Ewell Castle School
Age range
3 - 18
Location
Church Street, Ewell, Epsom, Surrey, KT17 2AW
Head’s name
Silas Edmonds
Exeter School
Age range
7 - 18
Location
Victoria Park Road, Exeter, Devon, EX2 4NS, United Kingdom
Head’s name
Louise Simpson
Farringtons School
Age range
3 - 18
Location
Perry Street, Chislehurst, BR7 6LR, United Kingdom
Head’s name
David Jackson
Felsted School
Age range
4 - 18
Location
Stebbing Road, Felsted, Essex, CM6 3LL, United Kingdom
Head’s name
Christopher Townsend
Fettes College
Age range
7 - 18
Location
Carrington Road, Edinburgh, Mid Lothian, Scotland, EH4 1QX, United Kingdom
Head’s name
Helen Harrison
Forest School
Age range
4 - 18
Location
College Place, Waltham Forest, London, E17 3PY, United Kingdom
Head’s name
Marcus Cliff Hodges
Framlingham College
Age range
3 - 18
Location
College Road, Framlingham, Suffolk, IP13 9EY, United Kingdom
Head’s name
Louise North
Francis Holland, Regent’s Park
Age range
11 - 18
Location
Ivor Place, London, NW1 6XR, United Kingdom
Head’s name
Katharine Woodcock