| Senator |  Lifespan |  Party[1] |  Prov. |  Entered |  Left |  Appointed by |  Left due to |  For life?  | 
  | Jane MacAdam |  1957–present |   |  PE |  3 May 2023 |  — |  Trudeau, J. |  — |    | 
  | Creelman MacArthur |  1874–1943 |  L |  PE |  5 September 1925 |  27 December 1943 |  King |  Death |  Y  | 
  | Andrew Archibald Macdonald |  1829–1912 |  LC |  PE |  11 May 1891 |  21 March 1912 |  Macdonald |  Death |  Y  | 
  | Finlay Macdonald |  1923–2002 |  PC |  NS |  21 December 1984 |  4 January 1998 |  Mulroney |  Retirement |    | 
  | John Macdonald |  1824–1890 |  IL |  ON |  9 November 1887 |  4 February 1890 |  Macdonald |  Death |  Y  | 
  | John Alexander Macdonald |  1883–1945 |  C |  NS |  2 March 1932 |  11 June 1945 |  Bennett |  Death |  Y  | 
  | John Alexander Macdonald |  1874–1948 |  C |  PE |  20 July 1935 |  15 November 1948 |  Bennett |  Death |  Y  | 
  | John Joseph MacDonald |  1891–1986 |  PC |  PE |  27 January 1958 |  20 April 1971 |  Diefenbaker |  Resignation |  Y  | 
  | John Michael Macdonald |  1906–1997 |  PC |  NS |  24 June 1960 |  20 June 1997 |  Diefenbaker |  Death |  Y  | 
  | Michael L. MacDonald |  1955–present |  C |  NS |  2 January 2009 |  — |  Harper |  — |    | 
  | William John Macdonald |  1832–1916 |  C |  BC |  13 December 1871 |  13 April 1915 |  Macdonald |  Resignation |  Y  | 
  | William Ross Macdonald |  1891–1976 |  L |  ON |  12 June 1953 |  22 December 1967 |  St. Laurent |  Voluntary retirement |  Y  | 
  | Angus Claude Macdonell |  1861–1924 |  C |  ON |  1 August 1917 |  1 January 1921 |  Borden |  Resignation |  Y  | 
  | Archibald Hayes Macdonell |  1868–1939 |  C |  ON |  7 November 1921 |  12 November 1939 |  Meighen |  Death |  Y  | 
  | Allan MacEachen |  1921–2017 |  L |  NS |  29 June 1984 |  6 July 1996 |  Trudeau, P. |  Retirement |    | 
  | Alexander Macfarlane |  1818–1898 |  C |  NS |  10 October 1870 |  14 December 1898 |  Macdonald |  Death |  Y  | 
  | Donald MacInnes |  1824–1900 |  L |  ON |  24 December 1881 |  2 December 1900 |  Macdonald |  Death |  Y  | 
  | Robert Mackay |  1840–1916 |  L |  QC |  21 January 1901 |  25 December 1916 |  Laurier |  Death |  Y  | 
  | William MacKay |  1847–1915 |  C |  NS |  20 November 1912 |  8 November 1915 |  Borden |  Death |  Y  | 
  | David MacKeen |  1839–1916 |  C |  NS |  21 February 1896 |  15 October 1915 |  Bowell |  Resignation |  Y  | 
  | Ian Alistair Mackenzie |  1890–1949 |  L |  BC |  19 January 1948 |  2 September 1949 |  King |  Death |  Y  | 
  | Norman MacKenzie |  1894–1986 |  IL |  BC |  24 February 1966 |  5 January 1969 |  Pearson |  Retirement |    | 
  | James Angus MacKinnon |  1881–1958 |  L |  AB |  9 May 1949 |  18 April 1958 |  St. Laurent |  Death |  Y  | 
  | Donald MacLennan |  1877–1953 |  L |  NS |  29 January 1940 |  19 October 1953 |  King |  Death |  Y  | 
  | Alan Macnaughton |  1903–1999 |  L |  QC |  8 July 1966 |  30 July 1978 |  Pearson |  Retirement |    | 
  | David Lewis Macpherson |  1818–1896 |  C |  ON |  23 October 1867 |  16 August 1896 |  Royal proclamation |  Death |  Y  | 
  | Heath MacQuarrie |  1919–2002 |  PC |  PE |  3 October 1979 |  18 September 1994 |  Clark |  Retirement |    | 
  | Duncan Kenneth MacTavish |  1899–1963 |  L |  ON |  11 June 1963 |  15 November 1963 |  Pearson |  Death |  Y  | 
  | Shirley Maheu |  1931–2006 |  L |  QC |  1 February 1996 |  1 February 2006 |  Chrétien |  Death |    | 
  | Frank Mahovlich |  1938–present |  L |  ON |  11 June 1998 |  10 January 2013 |  Chrétien |  Retirement |    | 
  | Charles-Christophe Malhiot |  1808–1874 |  L |  QC |  23 October 1867 |  9 November 1874 |  Royal proclamation |  Death |  Y  | 
  | Marian Maloney |  1924–2010 |  L |  ON |  11 June 1998 |  16 August 1999 |  Chrétien |  Retirement |    | 
  | Ghislain Maltais |  1944–present |  C |  QC |  6 January 2012 |  22 April 2019 |  Harper |  Retirement |    | 
  | Ernest Manning |  1908–1996 |  SC |  AB |  7 October 1970 |  20 September 1983 |  Trudeau, P. |  Retirement |    | 
  | Fabian Manning |  1964–present |  C |  NL |  22 December 2008 |  28 March 2011 |  Harper |  Resigned |    | 
  | 25 May 2011  |  —  |  —  | 
  | Jean Marchand |  1918–1988 |  L |  QC |  9 December 1976 |  15 December 1983 |  Trudeau, P. |  Resignation |    | 
  | Leonard Marchand |  1933–2016 |  L |  BC |  29 June 1984 |  1 March 1998 |  Trudeau, P. |  Resignation |    | 
  | Arthur Marcotte |  1873–1958 |  C |  SK |  6 July 1931 |  18 August 1958 |  Bennett |  Death |  Y  | 
  | Lorna Marsden |  1942–present |  L |  ON |  24 January 1984 |  31 August 1992 |  Trudeau, P. |  Resignation |    | 
  | Duncan Marshall |  1872–1946 |  L |  ON |  20 January 1938 |  16 January 1946 |  King |  Death |  Y  | 
  | Elizabeth Marshall |  1951–present |  C |  NL |  29 January 2010 |  — |  Harper |  — |    | 
  | Jack Marshall |  1919–2004 |  PC |  NL |  23 March 1978 |  26 November 1994 |  Trudeau, P. |  Retirement |    | 
  | Paul Martin Sr. |  1903–1992 |  L |  ON |  20 April 1968 |  30 October 1974 |  Trudeau, P. |  Resignation |    | 
  | Peter Francis Martin |  1856–1935 |  C |  NS |  5 December 1921 |  2 May 1935 |  Meighen |  Death |  Y  | 
  | Yonah Martin |  1965–present |  C |  BC |  2 January 2009 |  — |  Harper |  — |    | 
  | Sabi Marwah |  1951–present |  NA |  ON |  10 November 2016 |  7 September 2023 |  Trudeau, J. |  Resignation |    | 
  | James Mason |  1843–1918 |  C |  ON |  26 May 1913 |  16 July 1918 |  Borden |  Death |  Y  | 
  | Paul Massicotte |  1951–present |  L |  QC |  26 June 2003 |  — |  Chrétien |  — |    | 
  | Louis-Rodrigue Masson |  1833–1903 |  C |  QC |  29 September 1882 |  6 November 1884 |  Macdonald |  Resignation |  Y  | 
  | 3 February 1890  |  11 June 1903  | 
  | Roderick Matheson |  1793–1873 |  C |  ON |  23 October 1867 |  13 January 1873 |  Royal proclamation |  Death |  Y  | 
  | Marnie McBean |  1968–present |   |  ON |  20 December 2023 |  — |  Trudeau, J. |  — |    | 
  | Alexander McCall |  1844–1925 |  C |  ON |  26 May 1913 |  10 June 1925 |  Borden |  Death |  Y  | 
  | Lachlin McCallum |  1823–1903 |  LC |  ON |  4 February 1887 |  13 January 1903 |  Macdonald |  Death |  Y  | 
  | Mary Jane McCallum |  1952–present |   |  MB |  4 December 2017 |  — |  Trudeau, J. |  — |    | 
  | Abner Reid McClelan |  1831–1917 |  L |  NB |  23 October 1867 |  9 December 1896 |  Royal proclamation |  Resignation |  Y  | 
  | Archibald McCoig |  1873–1927 |  L |  ON |  4 January 1922 |  21 November 1927 |  King |  Death |  Y  | 
  | John Mccormick |  1858–1936 |  C |  NS |  21 September 1921 |  21 February 1936 |  Meighen |  Death |  Y  | 
  | Elaine McCoy |  1946–2020 |  PC→IPC→NA |  AB |  24 March 2005 |  29 December 2020 |  Martin |  Death |    | 
  | Walter McCrea |  1810–1892 |  L |  ON |  23 October 1867 |  5 January 1871 |  Royal proclamation |  Resignation |  Y  | 
  | Jonathan McCully |  1809–1877 |  L |  NS |  23 October 1867 |  28 September 1870 |  Royal proclamation |  Resignation |  Y  | 
  | Wallace McCutcheon |  1906–1969 |  PC |  ON |  9 August 1962 |  13 May 1968 |  Diefenbaker |  Resignation |  Y  | 
  | Alexander Hamilton McDonald |  1919–1980 |  L |  SK |  13 August 1965 |  31 March 1980 |  Pearson |  Death |    | 
  | Charles McDonald |  1867–1936 |  L |  BC |  30 December 1935 |  6 October 1936 |  King |  Death |  Y  | 
  | Donald McDonald |  1816–1879 |  L |  ON |  23 October 1867 |  20 January 1879 |  Royal proclamation |  Death |  Y  | 
  | John Alexander McDonald |  1889–1962 |  L |  NS |  18 April 1945 |  16 April 1962 |  King |  Death |  Y  | 
  | John Anthony McDonald |  1875–1948 |  I |  NB |  17 February 1921 |  12 December 1948 |  Meighen |  Death |  Y  | 
  | William McDonald |  1837–1916 |  C |  NS |  12 May 1884 |  4 July 1916 |  Macdonald |  Death |  Y  | 
  | Wilfrid Laurier McDougald |  1881–1942 |  L |  QC |  25 June 1926 |  3 May 1932 |  King |  Resignation |  Y  | 
  | Charles McElman |  1920–2000 |  L |  NB |  24 February 1966 |  1 April 1990 |  Pearson |  Resignation |    | 
  | Gerry McGeer |  1888–1947 |  L |  BC |  9 June 1945 |  11 August 1947 |  King |  Death |  Y  | 
  | Frederic McGrand |  1895–1988 |  L |  NB |  28 July 1955 |  22 January 1988 |  St. Laurent |  Resignation |  Y  | 
  | James Drummond McGregor |  1838–1918 |  L |  NS |  24 April 1903 |  1 October 1910 |  Laurier |  Resignation |  Y  | 
  | William Henry McGuire |  1875–1957 |  L |  ON |  20 December 1926 |  31 October 1957 |  King |  Death |  Y  | 
  | George McHugh |  1845–1926 |  L |  ON |  21 January 1901 |  28 November 1926 |  Laurier |  Death |  Y  | 
  | George McIlraith |  1908–1992 |  L |  ON |  27 April 1972 |  29 July 1983 |  Trudeau, P. |  Retirement |    | 
  | Thomas Robert McInnes |  1840–1904 |  I |  BC |  24 December 1881 |  18 November 1897 |  Macdonald |  Resignation |  Y  | 
  | Tom McInnis |  1945–present |  C |  NS |  6 September 2012 |  9 April 2020 |  Harper |  Retirement |    | 
  | James P. McIntyre |  1883–1957 |  L |  PE |  19 February 1943 |  8 April 1957 |  King |  Death |  Y  | 
  | Paul McIntyre |  1944–present |  C |  NB |  6 September 2012 |  1 November 2019 |  Harper |  Retirement |    | 
  | Thomas McKay |  1839–1912 |  LC |  NS |  24 December 1881 |  13 January 1912 |  Macdonald |  Death |  Y  | 
  | Stanley McKeen |  1897–1966 |  L |  BC |  27 January 1947 |  1 December 1966 |  King |  Death |  Y  | 
  | George Crawford McKindsey |  1829–1901 |  C |  ON |  11 January 1884 |  12 February 1901 |  Macdonald |  Death |  Y  | 
  | Peter McLaren |  1833–1919 |  C |  ON |  21 February 1890 |  23 May 1919 |  Macdonald |  Death |  Y  | 
  | Alexander Neil McLean |  1885–1967 |  L |  NB |  18 April 1945 |  12 March 1967 |  King |  Death |  Y  | 
  | Donald A. McLean |  1907–1973 |  L |  NB |  15 March 1968 |  5 November 1973 |  Pearson |  Death |    | 
  | John McLean |  1846–1936 |  C |  PE |  3 December 1915 |  20 February 1936 |  Borden |  Death |  Y  | 
  | Archibald McLelan |  1824–1890 |  LC |  NS |  21 June 1869 |  20 May 1881 |  Macdonald |  Resignation |  Y  | 
  | John Stewart McLennan |  1853–1939 |  C |  NS |  10 February 1916 |  15 September 1939 |  Borden |  Death |  Y  | 
  | William McMaster |  1811–1887 |  L |  ON |  23 October 1867 |  22 September 1887 |  Royal proclamation |  Death |  Y  | 
  | Lendrum McMeans |  1859–1941 |  C |  MB |  26 July 1917 |  13 September 1941 |  Borden |  Death |  Y  | 
  | Donald McMillan |  1835–1914 |  C |  ON |  11 January 1884 |  26 July 1914 |  Macdonald |  Death |  Y  | 
  | James McMullen |  1833–1913 |  L |  ON |  11 February 1902 |  18 March 1913 |  Laurier |  Death |  Y  | 
  | John M. McNair |  1957–present |   |  NB |  31 October 2023 |  — |  Trudeau, J. |  — |    | 
  | William Craig McNamara |  1904–1984 |  L |  MB |  7 October 1970 |  8 August 1979 |  Trudeau, P. |  Retirement |    | 
  | Marilou McPhedran |  1951–present |  NA |  MB |  10 November 2016 |  — |  Trudeau, J. |  — |    | 
  | Alexander Duncan McRae |  1874–1946 |  C |  BC |  4 September 1931 |  26 June 1946 |  Bennett |  Death |  Y  | 
  | Peter McSweeney |  1842–1921 |  L |  NB |  15 March 1899 |  2 February 1921 |  Laurier |  Death |  Y  | 
  | Marie-Françoise Mégie |  1950–present |  NA |  QC |  25 November 2016 |  — |  Trudeau, J. |  — |    | 
  | Arthur Meighen |  1874–1960 |  C |  ON |  2 March 1932 |  16 January 1942 |  Bennett |  Resignation |  Y  | 
  | Michael Meighen |  1939–present |  C |  ON |  27 September 1990 |  6 February 2012 |  Mulroney |  Resignation |    | 
  | Terry Mercer |  1947–present |  L |  NS |  7 November 2003 |  6 May 2022 |  Chrétien |  Retirement |    | 
  | Pana Merchant |  1943–present |  L |  SK |  12 December 2002 |  31 March 2017 |  Chrétien |  Resignation |    | 
  | Léonce Mercier |  1926–2019 |  L |  QC |  9 August 1996 |  11 August 2001 |  Chrétien |  Retirement |    | 
  | Don Meredith |  1964–present |  C→NA |  ON |  18 December 2010 |  10 May 2017 |  Harper |  Resignation |    | 
  | Samuel Merner |  1823–1908 |  C |  ON |  12 January 1887 |  11 August 1908 |  Macdonald |  Death |  Y  | 
  | Léon Méthot |  1895–1972 |  PC |  QC |  12 October 1957 |  6 August 1972 |  Diefenbaker |  Death |  Y  | 
  | Hervé Michaud |  1912–1978 |  L |  NB |  15 March 1968 |  5 June 1978 |  Pearson |  Death |    | 
  | Edward Michener |  1869–1947 |  C |  AB |  5 February 1918 |  16 June 1947 |  Borden |  Death |  Y  | 
  | William Miller |  1835–1912 |  LC |  NS |  23 October 1867 |  23 February 1912 |  Royal proclamation |  Death |  Y  | 
  | David Mills |  1831–1903 |  L |  ON |  13 November 1896 |  7 February 1902 |  Laurier |  Resignation |  Y  | 
  | Samuel Sylvester Mills |  1806–1874 |  C |  ON |  23 October 1867 |  24 January 1874 |  Royal proclamation |  Death |  Y  | 
  | John Milne |  1839–1922 |  C |  ON |  3 December 1915 |  4 March 1922 |  Borden |  Death |  Y  | 
  | Lorna Milne |  1934–2023 |  L |  ON |  21 September 1995 |  13 December 2009 |  Chrétien |  Retirement |    | 
  | Grant Mitchell |  1951–present |  L→IL→NA |  AB |  24 March 2005 |  24 April 2020 |  Martin |  Resignation |    | 
  | Peter Mitchell |  1824–1899 |  LC |  NB |  23 October 1867 |  13 July 1872 |  Royal proclamation |  Resignation |  Y  | 
  | William Mitchell |  1851–1926 |  L |  QC |  5 March 1904 |  10 May 1926 |  Laurier |  Death |  Y  | 
  | Julie Miville-Dechêne |  1959–present |   |  QC |  20 June 2018 |  — |  Trudeau, J. |  — |    | 
  | Percy Mockler |  1949–present |  C |  NB |  2 January 2009 |  13 April 2024 |  Harper |  Retirement |    | 
  | Gildas Molgat |  1927–2001 |  L |  MB |  7 October 1970 |  28 February 2001 |  Trudeau, P. |  Death |    | 
  | John Patrick Molloy |  1873–1948 |  L |  MB |  6 October 1925 |  16 March 1948 |  King |  Death |  Y  | 
  | Hartland Molson |  1907–2002 |  I |  QC |  28 July 1955 |  31 May 1993 |  St. Laurent |  Resignation |  Y  | 
  | Lucie Moncion |  1958–present |  NA |  ON |  10 November 2016 |  — |  Trudeau, J. |  — |    | 
  | Gustave Monette |  1887–1969 |  PC |  QC |  12 October 1957 |  23 December 1969 |  Diefenbaker |  Death |  Y  | 
  | Donald Montgomery |  1808–1893 |  C |  PE |  18 October 1873 |  31 July 1893 |  Macdonald |  Death |  Y  | 
  | Hippolyte Montplaisir |  1839–1927 |  LC |  QC |  9 February 1891 |  20 June 1927 |  Macdonald |  Death |  Y  | 
  | Rosemary Moodie |  1956–present |   |  ON |  12 December 2018 |  — |  Trudeau, J. |  — |    | 
  | Wilfred Moore |  1942–present |  L |  NS |  26 September 1996 |  14 January 2017 |  Chrétien |  Retirement |    | 
  | Lucien Moraud |  1885–1951 |  C |  QC |  30 December 1933 |  29 May 1951 |  Bennett |  Death |  Y  | 
  | Pierre Moreau |  1957–present |   |  QC |  10 September 2024 |  — |  Trudeau, J. |  — |    | 
  | Yves Morin |  1929–2024 |  L |  QC |  8 March 2001 |  28 November 2004 |  Chrétien |  Retirement |    | 
  | Oliver Mowat |  1820–1903 |  L |  ON |  15 July 1896 |  18 November 1897 |  Laurier |  Resignation |  Y  | 
  | Tracy Muggli |  1964/1965–present |   |  SK |  16 August 2024 |  — |  Trudeau, J. |  — |    | 
  | Robert Muir |  1919–2011 |  PC |  NS |  26 March 1979 |  10 November 1994 |  Trudeau, P. |  Retirement |    | 
  | William Muirhead |  1819–1884 |  L |  NB |  4 January 1873 |  29 December 1884 |  Macdonald |  Death |  Y  | 
  | Robert Alexander Mulholland |  1860–1927 |  C |  ON |  12 March 1918 |  1 October 1927 |  Borden |  Death |  Y  | 
  | Henry Mullins |  1861–1952 |  C |  MB |  14 August 1935 |  5 September 1950 |  Bennett |  Resignation |  Y  | 
  | Jim Munson |  1946–present |  L |  ON |  10 December 2003 |  14 July 2021 |  Chrétien |  Retirement |    | 
  | James Murdock |  1871–1949 |  L |  ON |  20 March 1930 |  15 May 1949 |  King |  Death |  Y  | 
  | Charles Murphy |  1862–1935 |  L |  ON |  5 September 1925 |  24 November 1935 |  King |  Death |  Y  | 
  | Edward Murphy |  1818–1895 |  LC |  QC |  30 May 1889 |  5 December 1895 |  Macdonald |  Death |  Y  | 
  | Patrick Charles Murphy |  1868–1925 |  C |  PE |  20 November 1912 |  6 March 1925 |  Borden |  Death |  Y  | 
  | Lowell Murray |  1936–present |  PC |  ON |  13 September 1979 |  26 September 2011 |  Clark |  Retirement |    |