Billing is a civil parish in eastern Northampton in England, covering the Great Billing, Little Billing, Ecton Brook and Bellinge areas. It is geographically the largest area of Northampton. According to the 2001 census the parish had a population of 8,642, decreasing at the 2011 census to 8,457. Billing consists of four estates, with each estate constituting a ward of the parish. Great Billing and Little Billing were developed around the existing villages; Bellinge (or Middle Ward) and Ecton Brook were created as new communities.Billing is accessible by the A45 westward to Northampton which runs along the south side of Billing and is accessed through the Lumbertubs Way Interchange.