| Type | Other independent school |
| Phase | All through |
| Gender | Mixed |
| Age Range | 3 - 18 |
| Headteacher | Miss K Haynes |
| Address |
Middle Road Harrow-on-the-Hill HA2 0HN |
| Religious Character | None |
| Website | http://www.johnlyon.org |
| Telephone | 2085159400 |
| Number of pupils | 837 |
| Inspection | |
| GCSE national ranking | -- |
| A-Level national ranking | -- |
| Local authority | Harrow |
| Region | London |
| URN | 102247 |
| View this school information in GOV.UK website | |