The 1941 New Zealand census had been postponed due to World War II, so the 1946 electoral redistribution had to take ten years of population growth and movements into account.
[3] In the 1952 electoral redistribution, boundary adjustments were minor.
Settlements that were gained in this process include Wingatui, Fairfield, East Taieri, and the town of Mosgiel.
[7] During this period, the Mornington electorate was represented by one Member of Parliament, Wally Hudson of the Labour Party.
[8] When the electorate was abolished in 1963, Hudson retired from Parliament.