This is a list of nationally significant 20th-century architecture in South Australia. The buildings listed here appear in the publication "Nationally significant 20th century buildings in South Australia".[1]
| Building | Date | Address | Suburb | Architect / Architectural Practice | Notes | ||
| 1st Turner Wood Project Home | 1969 | Bellevue Heights | J Chappell | ||||
| 1951 | Adelaide | E Fitzgerald & J Brogan (NSW) | |||||
| 1901 | Exchange Place | Adelaide | Fuller & Dunn | Now houses the Royal Institution of Australia | |||
| 1993 | Carlo Gnezda / Sacon | ||||||
| All Soul's Church | 1920 | St Peters | |||||
| AMP Building | 1934 | King Wm St | Adelaide | ||||
| Apartments | 1992 | Kensington | Raffen Maron | ||||
| Savings Bank of South Australia | 1930 | 65 Woodville Rd | Now owned by City of Charles Sturt, used for youth services | ||||
| Savings Bank of South Australia head office (now BankSA)[2] | 1943 | Adelaide | Eric McMichael / E.H. McMichael & Harris[3] | ||||
| 1932 | Adelaide | ||||||
| 1989 | Adelaide | G Maron / Raffen Maron Architects | |||||
| 1936 | North Tce | Adelaide | |||||
| Bragg Laboratories | 1960 | U of A | Adelaide | part of the Physics Department, now renamed 'Darling West' | |||
| 1926–7 | Tusmore | George Gavin Lawson / Chas Rutt & Lawson | Superseded by Burnside Ballroom (1950), but still in use as rehearsal room, hire[4] [5] | ||||
| 1930 | Goodwood Road | Goodwood | |||||
| 1901 | Jeffcott St | North Adelaide | Bruce J Quinton | ||||
| Centennial Park, Jubilee Chapel | 1987 | Goodwood Rd | Pasadena | Geof Nairn / Geof Nairn Architects | at Centennial Park Cemetery | ||
| Central Market Lift | 1999 | Adelaide | Tectvs Architects | ||||
| City of Holdfast Bay Council Chambers | 1930 | Jetty Road | Brighton | Chris Smith | Former Brighton Town Hall | ||
| City of Mitcham Council Chamber | 1934 | Belair Rd | Torrens Park | D Berry | |||
| Colonel Light Centre | 1978 | Adelaide | |||||
| Court House | 1940 | Whyalla | P R Claridge? | ||||
| David Jones Department Store | 1963 | Adelaide | J McConnell / Hassell & McConnell | ||||
| Deepacres Apartments | 1942 | Melbourne Street | North Adelaide | Jack McConnell | |||
| Dr Kents Paddock Housing | 1983 | Kent Town | |||||
| Eco Housing Co-op Inc | 1999 | Adelaide | Phillips & Pilkington | ||||
| Eden Park Residence | 1901 | Marryatville | |||||
| Elder House | 1937 | Adelaide | |||||
| Entry Pavilion, Soldiers Memorial Grounds | 1922 | Torrensville | |||||
| 1924 | Pirie St | Adelaide | |||||
| Everard Court Apartments | 1930 | Keswick | |||||
| Flats 'Parkview' | 1959 | Adelaide | JS Chappel | ||||
| Flinders Major Communications Building | 1990 | Adelaide | |||||
| Forensic Science Centre | 1975 | Divett Place | Adelaide | ||||
| Freemasons Hall | 1923 | North Tce | Adelaide | Bruce J Quinton & WH Harral | |||
| Hampshire Hotel | 1911 | Adelaide | FK Milne | at Adelaide Central Market | |||
| Hardholt Building | 1940 | Port Adelaide | Philip Claridge / Claridge & Associates | ||||
| Hartley Building | 1927 | Kintore Ave | Adelaide | George Gavin Lawson / Public Buildings Department | |||
| 1935 | Hindmarsh | Walter Burley Griffin / Walter Burley Griffin & Eric Nicholls | |||||
| Hotel Bay View | 1940 | Whyalla | Philip Claridge & Associates ?? | ||||
| Immanuel College Chapel | 1970 | Novar Gardens | Eric Von Schramek / Von Schramek & Dawes | ||||
| Info Science, Tech, Eng Buildings | 1992 | Bedford Park | |||||
| IPEC Building | 1962 | Frewville | Peter Muller | ||||
| Jam Factory | 1991 | Adelaide | Steve Grieve | ||||
| 1966 | North Adelaide | Dickson & Platten | |||||
| Maughan Church | 1965 | Franklin St | Adelaide | Eric Von Schramek / Brown & Davies, in Assoc. Eric Von Schramek | Named for Rev. James Maughan Demolished in August 2016[6] | ||
| Metropolitan Fire Station | 1983 | Wakefield St | Adelaide | Rod Roach / R Roach & Woodhead Australia | |||
| MLC Building | 1957 | Adelaide | BSM, Lawson, Cheesman, Doley & PTRS | ||||
| Mt Gambier Fire Station | 1955 | Mt Gambier | Glover & Pointer | ||||
| Newland Memorial Church | 1927 | Victor Harbor | |||||
| 1972 | Rostrevor | Peter Hooper / Public Buildings Department | |||||
| Nunyara Chapel | 1962 | Belair | Cheesman, Doley, Brabham & Neighbour | ||||
| Nurney Residence | 1930 | North Adelaide | W Bagot (Alterations) | ||||
| Office Building | 1965 | Adelaide | Hassell & McConnell | ||||
| Offices | 1991 | Adelaide | Hassell Architects | ||||
| Old Penola Estate | 1970 | Penola | Geoffrey Woodfall (VIC) | ||||
| Penfolds Magill Estate Restaurant | 1996 | Penfolds Rd | Magill | Keith Cottier / Allen, Jack & Cottier | |||
| Power Station & Offices | 1912 | Adelaide | |||||
| Prince Alfred College Hall | 1963 | Dequetteville Tce | Kent Town | Hassell & McConnell | |||
| Reserve Bank | 1962 | Victoria Sq | Adelaide | Dept of Works & RA Jensen | |||
| Residence | 1912 | Thorngate | FW Danker | ||||
| Residence | 1920 | Norwood | Jackman Gooden | ||||
| Residence | 1930 | Prospect | |||||
| Residence | 1950 | Leabrook | |||||
| Residence | 1906 | Kent Town | FW Danker | ||||
| Residence | 1914 | Toorak Gardens | FK Milne | ||||
| Residence | 1963 | Medindie | Peter Muller | ||||
| Residence | 1940 | Erindale | McConnell or Ellis? | ||||
| Residence | 1949 | Springfield | Russell Ellis | ||||
| Residence | 1953 | Burnside | Don Thompson / JS Chappel | ||||
| Residence | 1955 | Leabrook | |||||
| Residence | 1956 | Kensington Park | Alexandra Mokwinska | ||||
| Residence | 1957 | Marryatville | M Doley | ||||
| Residence | 1957 | Beaumont | Cheesman, Doley, Brabham & Neighbour | ||||
| Residence | 1964 | Norwood | Brian Polomka | ||||
| Residence | 1975 | Walkerville | Geof Nairn | ||||
| Residence | 1990 | College Park | Roger Myles | ||||
| Residence | 1999 | Malvern | Con Bastiras | ||||
| Residence - Marina | 1998 | North Haven | Nick Tridente / Tridente Architects | ||||
| Residence - SL 3 | 1970 | Belair | Snowden & Pikusa | ||||
| Residence (Destree) | 1964 | Burnside | Robert Dickson | ||||
| Residence (Dickson) | 1950 | Rostrevor | Robert Dickson | ||||
| Residence (Lee) | 1960 | Brighton | Dickson & Platten | ||||
| Residence (Neighbour) | 1958 | Torrens Park | Keith Neighbour | ||||
| Roche | 1905 | North Adelaide | English & Soward | ||||
| Rostrevor College - Resource Centre | 1998 | Rostrevor | Nick Tridente / Tridente Architects | ||||
| Ruthven Mansions | 1911 | 21 Pulteney St | Adelaide | Alfred Barham Black / Black & Fuller | Now called Mansions on Pulteney | ||
| SA Brewing Co Offices | 1941 | Adelaide | FK Milne & SH Gilbert | ||||
| SA Bureau of Meteorology | 1970 | Kent Town | Jim Ward / Dept of Housing & Construction | ||||
| Sands & MacDougall Store | 1933 | King Wm St | Adelaide | Claridge, Bruer & Fisher | |||
| Scammell Residence | 1930 | Beaumont | George Gavin Lawson | ||||
| 1998 | College Park | Geof Nairn | |||||
| St David's Church | 1960 | Glynburn Road | Burnside | ||||
| St Georges Anglican Church | 1902 | Goodwood | Thomas Henry Lyon | ||||
| St Raphael's Church | 1916 | Young Street | Parkside | ||||
| St Theodore's Church | 1914 | Prescott Tce | |||||
| Stag Hotel | 1903 | Rundle St | Adelaide | Garlick & Jackman | |||
| State Bank | 1955 | Adelaide | |||||
| Thebarton Incinerator | 1935 | Walter Burley Griffin | |||||
| Thebarton Theatre / Town Hall | 1928 | Henley Beach Rd | Karberry & Chard | ||||
| Townhouses | 1966 | North Adelaide | Dickson & Platten | ||||
| Townhouses | 1973 | North Adelaide | Hannaford, Pellew & Hodgkinson | ||||
| Tubemakers Admin Building No 1 | 1938 | Kilburn | |||||
| Tubemakers Admin Building No 2 | 1930 | Kilburn | |||||
| 1950 | Adelaide | Louis Laybourne Smith / Woods, Bagot, Jory and Laybourne-Smith[7] | Demolished in November 2010 | ||||
| Union House | 1975 | Adelaide | Dickson & Platten | ||||
| Walkley House | 1956 | 26 Palmer Place | North Adelaide | Robin Boyd (Melb)[8] | Private residence, only house in South Australia designed by Robin Boyd | ||
| Walter Hughes Duncan Homes | 1908 | Alexandra Ave | Toorak Gardens | ||||
| 1931 | Adelaide | ||||||
| West Torrens Library | 1964 | Hilton | Keal & Jury | ||||
| Westminster School Performing Arts | 1989 | Marion | Hassell Architects | ||||
| 1938 | Adelaide | PR Claridge / Claridge & Associates | |||||
| 1903 | Adelaide | AS & FH Conrad | |||||
| Woodlands' Apartments | 1930 | North Adelaide | |||||
| Workmen's Cottages (Elder) | 1902 | Rose Street | E Davies & Rutt | ||||
| 1950 | Flinders St | Adelaide |