Askin gained preselection for and won the newly created seat of Collaroy, located in the Northern Beaches, at the 17 June 1950 election, gaining 63.69% of the vote. The Leader of the Liberal Party since 1946, Vernon Treatt led the Liberal/Country Coalition at the election, which resulted in a hung parliament, with Treatt's Coalition gaining 12 seats and a swing of 6.7% for a total of 46 seats. With the Labor Party also holding 46 seats, the balance of power lay with the two re-elected Independent Labor member, James Geraghty and John Seiffert, who had been expelled from the party for disloyalty during the previous parliament. Under a legalistic interpretation of the ALP rules, Seiffert was readmitted to the party and, together with the support of Geraghty, Premier James McGirr and Labor were able to stay in power. As the new local member for a constituency covering most of the Northern Beaches from North Manly to Pittwater, Askin protested against the lack of government development and services in the area, such as sewerage, education, and transport.