{|class="wikitable sortable"
|-
! Senator !! Lifespan !! Party !! Prov. !! Entered !! data-sort-type="date" | Left !! Appointed by !! Left due to !! For life?
|-
| Joseph Hormisdas Rainville || 1875–1942 || C || QC || 6 October 1932 || 14 April 1942 || Bennett || Death || Y
|-
| James Palmer Rankin || 1855–1934 || L || ON || 9 September 1925 || 15 June 1934 || King || Death || Y
|-
| Nelson Rattenbury || 1907–1973 || L || NB || 14 February 1964 || 27 May 1973 || Pearson || Death || Y
|-
| Valentine Ratz || 1848–1924 || L || ON || 18 January 1909 || 1 March 1924 || Laurier || Death || Y
|-
| Mohamed-Iqbal Ravalia || 1957–present|| || NL || 1 June 2018 || — || Trudeau, J. || — ||
|-
| Donat Raymond || 1880–1963 || L || QC || 20 December 1926 || 5 June 1963 || King || Death || Y
|-
| Robert Read || 1814–1896 || C || ON || 24 February 1871 || 29 June 1896 || Macdonald || Death || Y
|-
| David Reesor || 1823–1902 || L || ON || 23 October 1867 || 1 January 1901 || Royal proclamation || Resignation || Y
|-
| James Reid || 1839–1904 || LC || BC || 8 October 1888 || 3 May 1904 || Macdonald || Death || Y
|-
| John Dowsley Reid || 1859–1929 || C || ON || 22 September 1921 || 26 August 1929 || Meighen || Death || Y
|-
| Thomas Reid || 1886–1968 || L || BC || 7 September 1949 || 14 October 1967 || St. Laurent || Resignation || Y
|-
| Louis Renaud || 1818–1878 || C || QC || 23 October 1867 || 1 October 1873 || Royal proclamation || Resignation || Y
|-
| Edgar Nelson Rhodes || 1877–1942 || C || NS || 20 July 1935 || 15 March 1942 || Bennett || Death || Y
|-
| David Adams Richards || 1950–present|| || NB || 30 August 2017 || — || Trudeau, J. || — ||
|-
| Henry Westman Richardson || 1855–1918 || C || ON || 20 January 1917 || 27 October 1918 || Borden || Death || Y
|-
| Maurice Riel || 1922–2007 || L || QC || 5 October 1973 || 3 April 1997 || Trudeau, P. || Retirement ||
|-
| Daniel Aloysius Riley || 1916–1984 || L || NB || 21 December 1973 || 13 September 1984 || Trudeau, P. || Death ||
|-
| Daniel Edward Riley || 1860–1948 || L || AB || 25 June 1926 || 27 April 1948 || King || Death || Y
|-
| George Riley || 1843–1916 || L || BC || 22 March 1906 || 19 January 1916 || Laurier || Death || Y
|-
| Pierrette Ringuette || 1955–present|| L→NA || NB || 12 December 2002 || — || Chrétien || — ||
|-
| John William Ritchie || 1808–1890 || C || NS || 23 October 1867 || 28 September 1870 || Royal proclamation || Resignation || Y
|-
| Michel Rivard || 1941–present|| C || QC || 22 December 2008 || 7 August 2016 || Harper || Retirement ||
|-
| Jean-Claude Rivest || 1943–present|| I || QC || 11 March 1993 || 31 January 2015|| Mulroney || Resignation ||
|-
| Pietro Rizzuto || 1934–1997 || L || QC || 23 December 1976 || 3 August 1997 || Trudeau, P. || Death ||
|-
| Fernand Roberge || 1940–present|| PC || QC || 26 May 1993 || 19 July 2000 || Mulroney || Resignation ||
|-
| Brenda Robertson || 1929–2020 || C || NB || 21 December 1984 || 23 May 2004 || Mulroney || Retirement ||
|-
| Gideon Robertson || 1874–1933 || C || ON || 20 January 1917 || 5 August 1933 || Borden || Death || Y
|-
| James Edwin Robertson || 1840–1915 || L || PE || 7 February 1902 || 13 April 1915 || Laurier || Resignation || Y
|-
| John Robertson || 1799–1876 || L || NB || 23 October 1867 || 1 January 1876 || Royal proclamation || Death || Y
|-
| John Alexander Robertson || 1913–1965 || PC || ON || 29 November 1962 || 19 February 1965 || Diefenbaker || Death || Y
|-
| Wishart McLea Robertson || 1891–1967 || L || NS || 19 February 1943 || 24 December 1965 || King || Resignation || Y
|-
| Fernand Robichaud || 1939–present|| L || NB || 23 September 1997 || 2 December 2014 || Chrétien || Retirement ||
|-
| Hédard Robichaud || 1911–1999 || L || NB || 28 June 1968 || 8 October 1971 || Trudeau, P. || Resignation ||
|-
| Louis Robichaud || 1925–2005 || L || NB || 21 December 1973 || 21 October 2000 || Trudeau, P. || Retirement ||
|-
| Jean-Louis Philippe Robicheau || 1874–1948 || C || NS || 20 July 1935 || 1 March 1948 || Bennett || Death || Y
|-
| Brewer Waugh Robinson || 1891–1949 || L || PE || 19 April 1945 || 20 January 1949 || King || Death || Y
|-
| Clifford William Robinson || 1866–1944 || L || NB || 5 May 1924 || 27 July 1944 || King || Death || Y
|-
| Mary Robinson || 1970–present || || PE || 22 January 2024 || — || Trudeau, J. || — ||
|-
| Louis Robitaille || 1836–1888 || C || QC || 8 February 1883 || 28 December 1884 || Macdonald || Resignation || Y
|-
| Théodore Robitaille || 1834–1897 || C || QC || 29 January 1885 || 17 August 1897 || Macdonald || Death || Y
|-
| Dufferin Roblin || 1917–2010 || PC || MB || 23 March 1978 || 17 June 1992 || Trudeau, P. || Retirement ||
|-
| Douglas Roche || 1929–present|| I || AB || 17 September 1998 || 14 June 2004 || Chrétien || Retirement ||
|-
| William Roche || 1842–1925 || L || NS || 12 January 1910 || 19 October 1925 || Laurier || Death || Y
|-
| Charles-Séraphin Rodier Jr || 1818–1890 || C || QC || 1 December 1888 || 26 January 1890 || Macdonald || Death || Y
|-
| Arthur Roebuck || 1878–1971 || L || ON || 18 April 1945 || 17 November 1971 || King || Death || Y
|-
| Jean-Baptiste Rolland || 1815–1888 || C || QC || 22 October 1887 || 22 March 1888 || Macdonald || Death || Y
|-
| Bill Rompkey || 1936–2017 || L || NL || 21 September 1995 || 13 May 2011 || Chrétien || Retirement ||
|-
| George Henry Ross || 1878–1956 || L || AB || 1 December 1948 || 26 September 1956 || St. Laurent || Death || Y
|-
| George William Ross || 1841–1914 || L || ON || 15 January 1907 || 7 March 1914 || Laurier || Death || Y
|-
| James Gibb Ross || 1819–1888 || C || QC || 11 January 1884 || 1 October 1888 || Macdonald || Death || Y
|-
| rowspan="2" | James Hamilton Ross || rowspan="2" | 1856–1932 || rowspan="2" | L || NT || 30 September 1904 || 31 August 1905 || rowspan="2" | Laurier || rowspan="2" | Death || rowspan="2" | Y
|-
|SK
|1 September 1905
|14 December 1932
|-
| James W. Ross || 1938–present|| PC || NB || 27 September 1990 || 25 May 1993 || Mulroney || Resignation ||
|-
| John Ross || 1818–1871 || C || ON || 23 October 1867 || 31 January 1871 || Royal proclamation || Death || Y
|-
| John Jones Ross || 1831–1901 || C || QC || 12 April 1887 || 4 May 1901 || Macdonald || Death || Y
|-
| Krista Ann Ross || 1967–present || || NB || 31 October 2023 || — || Trudeau, J. || — ||
|-
| William Ross || 1824–1912 || L || NS || 18 May 1905 || 17 March 1912 || Laurier || Death || Y
|-
| William Benjamin Ross || 1855–1929 || C || NS || 20 November 1912 || 10 January 1929 || Borden || Death || Y
|-
| Eileen Rossiter || 1929–2007 || PC || PE || 17 November 1986 || 14 July 2004 || Mulroney || Retirement ||
|-
| Yvette Boucher Rousseau || 1917–1988 || L || QC || 27 March 1979 || 17 March 1988 || Trudeau, P. || Death ||
|-
| Jean-Louis Roux || 1923–2013 || L || QC || 31 August 1994 || 8 August 1996 || Chrétien || Resignation ||
|-
| Frederick William Rowe || 1912–1994 || L || NL || 9 December 1971 || 28 September 1987 || Trudeau, P. || Retirement ||
|-
| Philippe Roy || 1868–1948 || L || AB || 8 March 1906 || 21 April 1911 || Laurier || Resignation || Y
|-
| Calvin Ruck || 1925–2004 || L || NS || 11 June 1998 || 4 September 2000 || Chrétien || Retirement ||
|-
| Bob Runciman || 1942–present|| C || ON || 29 January 2010 || 10 August 2017 || Harper || Retirement ||
|-
| Nancy Ruth || 1942–present|| C || ON || 24 March 2005 || 6 January 2017 || Martin || Retirement ||
|-
| Thomas Ryan || 1804–1889 || LC || QC || 23 October 1867 || 25 May 1889 || Royal proclamation || Death || Y
|}