The BL postcode area, also known as the Bolton postcode area,[1] is a group of postal districts around the town of Bolton in Greater Manchester, England. They are subdivisions of two post towns. Statistics Population: 139,403 Ordnance Survey OS grid reference: SD715095 Administration Metropolitan borough: Bolton Metropolitan county: Greater Manchester Region: North West England Constituent country: England Sovereign state: United Kingdom Other Ceremonial county: Greater Manchester Historic county: Lancashire Services Police force: Greater Manchester Ambulance: North West Post office and telephone Post... Greater Manchester is a metropolitan county in North West England and has a population of 2. ... Motto: (French for God and my right) Anthem: God Save the King/Queen Capital London (de facto) Largest city London Official language(s) English (de facto) Unification - by Athelstan AD 927 Area - Total 130,395 km² (1st in UK) 50,346 sq mi Population - 2006 est. ... A post town is a required part of all UK postal addresses. ...