Portfield, DorsetPortfield is a suburb of Christchurch, Dorset. In 2011 the ward had a population of 4470.ServicesPortfield is served by Portfield School. a special school for children with autism, and a community hall.TransportPortfield is just to the north of Christchurch railway station.Schools Christchurch Junior School Christchurch Infant SchoolPoliticsPortfield is part of the Bournemouth, Christchurch and Poole Council. Portfield is part of the Christchurch parliamentary constituency for elections to the House of Commons. It is currently represented by Conservative MP Christopher Chope.