Joan Lynette Hall (née Bullock) (born 22 December 1946) is a former member of the South Australian House of Assembly, serving in the electoral district of Coles from 1993 to 2002 and the renamed electoral district of Morialta from 2002 to 2006. The wife of former Premier, Liberal Movement leader, and Australian Senator Steele Hall, she met Hall while working as his parliamentary secretary during the 1960s and 1970s. Later, she was a staffer to Premier Dean Brown before entering parliament as the member for the Adelaide Hills seat of Coles at the 1993 election.