from 1898, 9 wards from 1900 and 12 wards from 1911. The borough boundaries were enlarged several times as the town grew.

County boroughs, including Northampton, were abolished in 1974 under the Local Government Act 1972. A non-metropolitan district called Northampton was created instead, subordinate to Northamptonshire County Council. The new district covered the area of the former county borough plus adjoining areas within the designated