Myrna McQuarrie (c. 1941 – 2018) was a Canadian curler. McQuarrie and her Lethbridge Curling Club rink of , and won the 1977 Macdonald Lassies Championship, Canada's national women's curling championship. The 1977 McQuarrie rink went undefeated in their provincial playdowns, and continued their undefeated record into the provincial championship, which they won over 1966 and 1968 national champion . The team represented Alberta at the Canadian national championship, finishing with a 9-1 record to claim the title.