When Whitworth was demobbed and moved to the reserves on 28 June 1946 both Whitworth and Donkin, alongside Donkin's mother a brother, purchased a small farm in Dural where , with the help of a small government allowance from the army and family support.[1] This was in part because within the AWAS Whitworth had been so poorly paid that she came out in debt.[6] Whitworth said of this:[7][8]
[V]ery few of us wanted to go back to what we'd been doing before the war. Some had lost their husbands or… fiancés and their lives were virtually changed. There was a change of direction. Those who had been fortunate enough to keep their husbands and fiancés were quite happy to go back and be wives and mothers. But others of us wanted to do something different
— Joyce Ethel Whitworth, from her 1990 oral history interview
At the farm, which was 35.5 acres (14.4 ha), they grew fruit trees and raised animals and Whitworth called them peasant farmers and stated that they worked seven days a week.[8]
In January 1949 Whitworth became engaged to Roland Maclean, a solicitor practicing in Sydney, but the pair never married.[1]
Whitworth was also very active in community and church affairs and was a member of the parish council of her local church and the head of the women's fellowship there. She was also involved in many social functions for ex-AWAS officers from 1948 onwards and was president of the AWAS Association of New South Wales between 1959 and 1971; although she continued her involvement for the rest of her life becoming a patron and later life member. In 1989 she also became a patron of the Council of Ex-Servicewomen's Associations.[1][2]
Whitworth was also an ongoing volunteer for the Girl Guides Australia where in 1960, when she was serving on the state council, she established and directed a girls' developmental program in which she worked alongside Eleanor Manning (another former AWAS officer).[8] She also later served on the Guides federal executive and for this service she was made an Member of the Order of the British Empire on 8 June 1968 for her services to the community.[1][2][9]
In 1981 Whitworth and Donkin retired and moved to a retirement village in Castle Hill, where they lived in nearby units and Whitworth continued to volunteer. She died on 19 September 1998.[1][10]