| John McArthur | November 17, 1826 - May 15, 1906 |
| George Archibald McCall | March 16, 1802 - February 26, 1868 |
| George Brinton McClellan | December 3, 1826 - October 29, 1885 |
| John Alexander McClernand | May 30, 1812 - September 20, 1890 |
| Alexander McDowell McCook | April 22, 1831 - June 12, 1903 |
| Daniel McCook, Jr. | July 22, 1834 - July 17, 1864 |
| Edward Moody McCook | June 15, 1833 - September 9, 1909 |
| Robert Latimer McCook | December 28, 1827 - August 6, 1862 |
| Irvin McDowell | October 15, 1818 - May 4, 1885 |
| George Francis McGinnis | March 19, 1826 - May 29, 1910 |
| John Baillie McIntosh | June 6, 1829 - June 29, 1888 |
| Thomas Jefferson McKean | August 21, 1810 - April 19, 1870 |
| Ranald Slidell Mackenzie | July 27, 1840 - January 19, 1889 |
| Justus McKinstry | July 6, 1814 - December 11, 1897 |
| Nathaniel Collins McLean | February 2, 1815 - January 4, 1905 |
| James Winning McMillan | April 28, 1825 - March 9, 1903 |
| John McNeil | February 14, 1813 - June 8, 1891 |
| James Birdseye McPherson | November 14, 1828 - July 22, 1864 |
| Jasper Adalmorn Maltby | November 3, 1826 - December 12, 1867 |
| Joseph King Fenno Mansfield | December 22, 1803 - September 18, 1862 |
| Manlon Dickerson Manson | February 20, 1820 - February 4, 1895 |
| Randolph Barnes Marcy | April 9, 1812 - November 2, 1887 |
| Gillman Marston | August 20, 1811 - July 3, 1900 |
| John Henry Martindale | March 20, 1815 - December 13, 1881 |
| John Sanford Mason | August 21, 1824 - November 29, 1897 |
| Charles (Karl) Leopold Matthies | May 21, 1824 - October 16, 1868 |
| George Gordon Meade | December 31, 1815 - November 6, 1872 |
| Thomas Francis Meagher | August 3, 1823 - July 1, 1867 |
| Montgomery Cunningham Meigs | May 3, 1816 - January 2, 1892 |
| Solomon Meredith | May 29, 1810 - October 2, 1875 |
| Sullivan Amory Meredith | July 4, 1816 - December 26, 1874 |
| Wesley Merritt | June 16, 1834 - December 3, 1910 |
| Nelson Appleton Miles | August 8, 1839 - May 5, 1925 |
| John Franklin Miller | November 21, 1831 - March 8, 1886 |
| Stephen Miller | January 7, 1816 - August 18, 1881 |
| Robert Huston Milroy | June 11, 1816 - March 29, 1890 |
| Ormsby MacKnight Mitchel | July 28, 1809 - October 30, 1862 |
| John Grant Mitchell | November 6, 1838 - November 7, 1894 |
| Robert Byington Mitchell | April 4, 1823 - January 26, 1882 |
| William Reading Montgomery | July 10, 1801 - June 1, 1871 |
| George Webb Morell | January 8, 1815 - February 11, 1883 |
| Charles Hale Morgan | November 6, 1834 - December 20, 1875 |
| Edwin Denison Morgan | February 8, 1811 - February 14, 1883 |
| George Washington Morgan | September 20, 1820 - July 26, 1893 |
| James Dada Morgan | August 1, 1810 - September 12, 1896 |
| William Hopkins Morris | April 22, 1827 - August 26, 1900 |
