Melbourn is a large, clustered village in the far south-west of Cambridgeshire, England. Its traditional high street is bypassed by the A10, intersecting the settlement's other main axis exactly 3 miles northwest of the traditional focal point of Royston, Hertfordshire, the nearest larger settlement. It has over 4,600 inhabitants and is in the South Cambridgeshire district. The Prime Meridian passes to the west of Melbourn.