Mary Alice "Peggy" Butts (August 15, 1924 – March 6, 2004) was a Canadian politician who represented Nova Scotia in the Senate from 1997 to 1999.

Having taken a vow of poverty upon becoming a nun,[2] Butts was able to officially be sworn in only after her order formally transferred a small parcel of land to her name.

[2] Butts resigned at the age of 75 as required by law,[1] and for her two years of service donated her entire salary to charity.

[1] She had a strong influence on her nephew Gerald Butts, principal secretary to both Ontario Premier Dalton McGuinty and Canadian prime minister Justin Trudeau.

[3] Peggy Butts died in Sydney, Nova Scotia at age 79 in 2004.