Leavesden is a residential and commercial area in the northern part of Watford, England. It lies within the M25 Motorway. On its eastern side it is bounded by the M1 Motorway. Leavesden is split into two councils which are Watford Borough Council and Three Rivers District Council. Leavesden Green is an adjoining residential community which lies partly in Three Rivers and partly in the Borough of Watford.