- Classical pianist Glenn Gould lived in Apt. 902 at 110 St Clair Avenue West from 1962 until his death in 1982. He is buried in nearby Mount Pleasant Cemetery.
- J. E. H. MacDonald, a founding member of the Group of Seven painters, lived at 40 Duggan for several years until his death on September 26, 1932.
- Pierre Salinger (1925–2004) was press secretary to Presidents John F. Kennedy and Lyndon Johnson, and campaign manager to Robert F. Kennedy. He was mere metres away when R.F.K. was assassinated. He lived at 37 Lonsdale Road, while very young, from 1929-1932/3.
- Novelist Joy Fielding (b. 1945) wrote Kiss Mommy Goodbye while living at 83 Lonsdale Road during the last three years of the ’70s.
- Writer Farley Mowat (1933–2014) lived at 90 Lonsdale Road for six months in 1939-40.
- Poet Margaret Avison (1918–2007) lived in Apt. 104 at 150 St Clair Avenue West from 1964-70.
- Actor William Hutt (1920–2007) lived at 18 Ferndale Avenue for several years in his childhood.
- John Turner the second shortest sitting Prime Minister of Canada June 30 to Sept. 16 1984 lived at lived at 59 Oriole Rd. for a period ending in mid-2012.
Deer Park Residents Group 