This article is about the roundabout in Portsmouth. For the junction in London, see Cambridge Circus.
Cambridge Junction is a roundabout in the Old Portsmouth district of the city. It is named after Cambridge Barracks, which stood in the south-east corner. It was a busy crossroads for many years before being converted to a roundabout.
Prior to the growth of Portsmouth as a naval city, it was the junction of High Street Road and Keffal Road. The present street set-up was created in the 1880s.