This is a list of the oldest buildings and structures in Greater Sudbury, Ontario, Canada, that were constructed before 1920.
| Building | Image | Year completed | Builder | Style | Address | Community | Ref. | 
|---|---|---|---|---|---|---|---|
| Ste. Anne's Rectory | 1883 | Second Empire | 40 Beech Street | Sudbury | [1] | ||
| Copper Cliff Museum |   | 1894 | 26 Balsam Street | Copper Cliff | [2] | ||
| David Street Waterworks |   | 1896 | Industrial | 355 David Street | Sudbury | [3] | |
| St. Joseph's Hospital |   | 1898 | 20 Ste Anne Road | Sudbury | [4] | ||
| Carrefour Senator Rhéal Belisle Cultural Centre |   | 1899 | 2777 Main Street | Blezard Valley | [5] | 
| Building | Image | Year completed | Builder | Style | Address | Community | Ref. | 
|---|---|---|---|---|---|---|---|
| McVittie Residence |   | 1900 | William McVittie | 250 Edmund Street | Sudbury | [6] | |
| Flour Mill Museum |   | 1902 | 155 Kehoe Ave | Sudbury | [7] | ||
| Canadian Copper Company General Office Building |   | 1902 | Canadian Copper Company | 33 Godfrey Drive | Copper Cliff | [8] | |
| Baikie-Muirhead Building |   | 1903 | 73 Elm Street | Sudbury | [9] | ||
| Bélanger House | 1906 | Azilda Bélanger | Carpenter Gothic | 725 Notre Dame Street | Azilda | [10] | |
| Sudbury Brewing and Malting Co. Brewery |   | 1907 | 185 Lorne Street | Sudbury | [11] | ||
| Moses Block |   | 1915 | Hascal Moses | Flatiron | Durham at Elgin Street | Sudbury | [12] | 
| Canadian Pacific Railway Station |   | 1907 | Canadian Pacific Railway | Romanesque Revival | 1 Van Horne Street | Sudbury | [13] | 
| Belrock Mansion |   | 1907 | William J. Bell | Arts and crafts | 251 John Street | Sudbury | [14] | 
| Grand Theatre |   | 1909 | 28 Elgin Street | Sudbury | [15] | 
| Building | Image | Year completed | Builder | Style | Address | Community | Ref. | 
|---|---|---|---|---|---|---|---|
| Copper Cliff Fire Hall |   | 1910 | Town of Copper Cliff | Early 20th century fire hall | 7 Serpentine Street | Copper Cliff | [16] | 
| Flour Mill Silos |   | 1911 | Manitoba and Ontario Flour Mill | Industrial | Notre Dame Avenue at St. Charles Street | Sudbury | [17] | 
| Silverman Building |   | 1911 | Aaron Silverman | 67 Elm Street | Sudbury | [18] | |
| Church of the Epiphany |   | 1913 | Anglican Church of Canada | Gothic Revival | 85 Larch Street | Sudbury | [19] | 
| Bell Canada Building |   | 1913 | Bell Telephone Company of Canada | 83 Cedar Street | Sudbury | [20] | |
| Copper Cliff Hospital |   | 1913 | 38 Godfrey Drive | Copper Cliff | [8] | ||
| Prete Block |   | 1914 | Alex Prete | 206 Elgin Street | Sudbury | [21] | |
| Anderson Farm | 1914 | 550 Municipal  Road 24  | Lively | [22] | |||
| Canadian Pacific Telegraph Building |   | 1914 | Canadian Pacific Railway | Edwardian | 9 Elgin Street | Sudbury | [23] | 
| Bank of Toronto Copper Cliff Branch |   | 1914 | Bank of Toronto | 2 Serpentine Street | Copper Cliff | [24] | |
| École Saint-Louis-de-Gonzague |   | 1915 | Collegiate Gothic, Art Deco | 162 MacKenzie Street | Sudbury | [25] | |
| Rothschild Block |   | 1915 | Dan Rothschild | 7 Cedar Street | Sudbury | [26] | |
| Superintendents House |   | 1916 | Canadian Northern Railway | Arts and crafts | 26 Bloor Street | Capreol | [27] | 
| Copper Cliff Club |   | 1916 | Canadian Copper Company | Tudor Revival | 25 Creighton Road | Copper Cliff | [28] | 
| Stafford Block |   | 1916 | 93 Durham Street | Sudbury | [29] | ||
| Sterling Bank |   | 1918 | Sterling Bank of Canada | Baroque Revival | 80 Elm Street | Sudbury | [30] | 
| Capreol Public School |   | 1919 | Town of Capreol | 9 Morin Street | Capreol | [31] |