| LA_code | 209 |
| LA_name | Lewisham |
| EstablishmentNumber | 6309 |
| EstablishmentName | Sydenham High School, GDST |
| TypeOfEstablishment | Other independent school |
| EstablishmentStatus | Open |
| PhaseOfEducation | Not applicable |
| StatutoryLowAge | 4 |
| StatutoryHighAge | 19 |
| Boarders | No boarders |
| NurseryProvision | No Nursery Classes |
| OfficialSixthForm | Has a sixth form |
| Gender | Girls |
| ReligiousCharacter | None |
| ReligiousEthos | Inter- / non- denominational |
| Diocese | Not applicable |
| AdmissionsPolicy | Selective |
| TrustSchoolFlag | Not applicable |
| Trusts | |
| SchoolSponsorFlag | Not applicable |
| SchoolSponsors | |
| FederationFlag | Not applicable |
| Federations | |
| UKPRN | 10008540 |
| FurtherEducationType | Not applicable |
| Street | 19 Westwood Hill |
| Locality | Sydenham |
| Address3 | London |
| Town | |
| County | |
| Postcode | SE26 6BL |
| SchoolWebsite | https://www.sydenhamhighschool.gdst.net/ |
| TelephoneNum | 02085577000 |
| HeadTitle | Ms |
| HeadFirstName | Antonia |
| HeadLastName | Geldeard |
| Linkedestablishments |