Elspeth Ballantyne (born 20 April 1939) is an Australian retired actress, who appeared in productions in theatre, television and films over a career that spanned nearly 60 years, a veteran of the industry having started her career as a child actor and becoming a staple of the theatre starting from in 1947 and by the age of 15 in 1954 had turned professional. She became best known for her role in the TV cult series Prisoner from 1979 to 1986 as original character of but fair Prison Officer Meg Jackson (later Morris).

Ballantyne's parents were actors and she is the sister of film producer Jane Ballantyne. She was married to actor Dennis Miller from 1968 to 1977.