Browse Organisations - A
- Aboriginal Affairs Board (1963 - 1971), South Australian Government
- Aboriginal Women's Home, North Adelaide (1926 - 1970s)
- Aborigines Advancement League
- Aborigines Advancement League Hostel
- see Wiltja Hostel (1956 - 1982) - Aborigines Department (1912 - 1962), South Australian Government
- Aborigines Friends Association
- Aborigines Office (1866 - 1912), South Australian Government
- Aborigines Protection Board (1940 - 1963), South Australian Government
- Adelaide Catholic Archdiocesan Archives
- Adelaide Central Methodist Mission (c. 1901 - 1977)
- The Adelaide Central Methodist Mission Children’s Home
- see Lentara (1960 - 1977) - Adelaide Central Mission (1977 - 2003)
- Adelaide Children's Hospital (1876 - 1989)
- Adelaide City Archives
- Adelaide Hospital
- see Royal Adelaide Hospital (1837 - ) - Adelaide Maternity Home
- see McBride Maternity Hospital (1914 - 1975) - Adelaide Maternity Home (1893 - 1914)
- Adelaide Maternity Hospital
- see Adelaide Maternity Home (1893 - 1914) - The Adelaide Retreat for Women
- see The House of Mercy (1881 - 1974) - Adoption and Family Information Service of SA, Department for Families and Communities
- Advisory Council of Aborigines (1918 - 1940), South Australian Government
- Albara Road Cottage (1990s - ), Woodville Spastic Centre
- Allambi Girls Hostel (1947 - 1977)
- Anglican Archives
- Anglican Church of Australia (1981 - )
- Anglican Social Welfare Bureau (1981 - 1997)
- Anglicare SA (1997 - )
- The Ark
- see Adelaide Maternity Home (1893 - 1914) - Australian Board of Missions
- The Australian Red Cross
