Upon demobilisation, Robson returned to his political career. His long absence during his war service had put pressure on his marriage and ended when his wife divorced him in 1947. He remarried soon after to Naomi Priscilla Gee at St Peter's Anglican Church, Watsons Bay on 9 December 1950. During his military service he had missed the political upheavals of the collapse of the UAP and the foundation of the Liberal Party in 1945. He retained his seat at the election on 3 May 1947, assisted by a young Robert Askin, a former Sergeant in his battalion. Robson retained his seat again with 67.39%. He later supported Askin in his bid to enter the Parliament in 1950. Robson was re-elected with 68.37%. He was returned again at the 14 February 1953 election unopposed.