Thomas Sydenham

Owen Sound, which was once known as Sydenham

Lord Sydenham

Sydenham College — a college in Bombay

Sydenham railway station, Sydney

Sydenham railway line, Melbourne

Sydenham, London

Sydenham's chorea

Sydenham, New South Wales, a suburb of Sydney

Sydenham railway station, Melbourne

Sydenham railway station (London)

Sydenham, South Africa

Sydenham, Victoria, a suburb of Melbourne

Sydenham railway station (Belfast)

a Sydenham River which empties into Georgian Bay on Lake Huron

two towns named Sydenham, Ontario

a Sydenham River which empties into Lake Saint Clair

Sydenham, a suburb of Christchurch, New Zealand

A suburb of Royal Leamington Spa

Sydenham, Belfast, a suburb and electoral ward of East Belfast

A village in Oxfordshire, near Thame