Osidge is a district in the London Borough of Barnet, just west of the border with the London Borough of Enfield. It may be defined as the part of postal district N14 that is in Barnet.
Major buildings in Osidge include Ashmole School, Osidge Primary School and Osidge Health Centre.
The two main roads in Osidge are Osidge Lane and Hampden Way, which meet at a roundabout called Hampden Square. Around the roundabout are several parades of shops and the Osidge Arms pub. South and west of this roundabout is a large area of green belt land, crossed by Pymmes Brook and leading down to New Southgate Cemetery. Another road, Whitehouse Way, provided the backdrop to scenes from Mike Leigh’s film Secrets and Lies.