{|class="wikitable sortable"
|-
! Senator !! Lifespan !! Party !! Prov. !! Entered !! Left !! Appointed by !! Left due to !! For life?
|-
| Henry Kaulback || 1830–1896 || C || NS || 27 March 1872 || 8 January 1896 || Macdonald || Death || Y
|-
| Judith Keating || 1957–2021 || || NB || 30 January 2020 || 15 July 2021 || Trudeau, J. || Death ||
|-
| James Kelleher || 1930–2013 || C || ON || 23 September 1990 || 2 October 2005 || Mulroney || Retirement ||
|-
| William McDonough Kelly || 1925–2013 || PC || ON || 23 December 1982 || 21 July 2000 || Trudeau, P. || Retirement ||
|-
| Albert Edward Kemp || 1858–1929 || C || ON || 4 November 1921 || 12 August 1929 || Meighen || Death || Y
|-
| Betty Kennedy || 1926–2017 || L || ON || 20 June 2000 || 4 January 2001 || Chrétien || Retirement ||
|-
| Colin Kenny || 1943–present|| L || ON || 29 June 1984 || 2 February 2018 || Trudeau, P. || Resignation ||
|-
| Edward Kenny || 1800–1891 || C || NS || 23 October 1867 || 11 April 1876 || Royal proclamation || Resignation || Y
|-
| Wilbert Keon || 1935–2019 || C || ON || 27 September 1990 || 17 May 2010 || Mulroney || Retirement ||
|-
| James Kirkpatrick Kerr || 1841–1916 || L || ON || 12 March 1903 || 4 December 1916 || Laurier || Death || Y
|-
| William Kerr || 1836–1906 || L || ON || 15 March 1899 || 22 November 1906 || Laurier || Death || Y
|-
| Thomas Joseph Kickham || 1901–1974 || L || PE || 8 July 1966 || 1 December 1974 || Pearson || Death ||
|-
| George Gerald King || 1836–1928 || L || NB || 18 December 1896 || 28 April 1928 || Laurier || Death || Y
|-
| James Horace King || 1873–1955 || L || BC || 7 June 1930 || 14 July 1955 || King || Death || Y
|-
| Joan Kingston || 1955–present || || NB || 31 October 2023 || — || Trudeau, J. || — ||
|-
| John James Kinley || 1881–1971 || L || NS || 18 April 1945 || 12 June 1971 || King || Resignation || Y
|-
| Mary Elizabeth Kinnear || 1898–1991 || L || ON || 6 April 1967 || 3 April 1973 || Pearson || Retirement ||
|-
| Noël Kinsella || 1939–2023 || C || NB || 12 September 1990 || 26 November 2014 || Mulroney || Retirement ||
|-
| Michael J. L. Kirby || 1941–present|| L || NS || 13 January 1984 || 31 October 2006 || Trudeau, P. || Resignation ||
|-
| John Nesbitt Kirchhoffer || 1848–1914 || C || MB || 16 December 1892 || 22 December 1914 || Thompson || Death || Y
|-
| Marty Klyne || 1957–present|| || SK || 24 September 2018 || — || Trudeau, J. || —
|-
| Adrian Knatchbull-Hugessen || 1891–1976 || L || QC || 12 January 1937 || 1 January 1967 || King || Voluntary retirement || Y
|-
| Vim Kochhar || 1936–present|| C || ON || 29 January 2010 || 21 September 2011 || Harper || Retirement ||
|-
| Leo Kolber || 1929–2020 || L || QC || 23 December 1983 || 18 January 2004 || Trudeau, P. || Retirement ||
|-
| Richard Kroft || 1938–present|| L || MB || 11 June 1998 || 24 September 2004 || Chrétien || Resignation ||
|-
| Stan Kutcher || 1951–present|| || NS || 12 December 2018 || — || Trudeau, J. || — ||
|}