| 1809 | February 12 | Abraham Lincoln is born in Hardin County, Kentucky. |
| 1842 | November 4 | Lincoln and Mary Todd marry. |
| 1843 | August 1 | Robert Todd Lincoln is born. |
| 1846 | March 10 | Edward Baker Lincoln is born. |
| 1847 | December 6 | Lincoln assumes his seat in the U. S. House of Representatives, representing Illinois. |
| 1850 | February 1 | Son Edward Lincoln dies. |
| 1850 | December 21 | William Wallace Lincoln is born. |
| 1853 | April 4 | Thomas "Tad" Lincoln is born. |
| 1858 | August 21 | The first Lincoln-Douglas debate was held in Ottawa, Illinois. |
| 1858 | August 27 | The second Lincoln Douglas Debate was held in Freeport, Illinois. |
| 1858 | September 15 | The third Lincoln Douglas Debate was held in Jonesboro, Illinois. |
| 1858 | September 18 | The fourth Lincoln Douglas Debate was held in Charleston, Illinois. |
| 1858 | October 7 | The fifth Lincoln Douglas Debate was held in Galesburg, Illinois. |
| 1858 | October 13 | The sixth Lincoln Douglas Debate was held in Quincy, Illinois. |
| 1858 | October 15 | The seventh and final Lincoln Douglas Debate was held in Alton, Illinois. |
| 1861 | March 4 | Abraham Lincoln is inaugurated the 16th President of the United States. |
| 1862 | September 17 | Battle of Antietam. |
| 1863 | January 1 | President Lincoln issues the Emancipation Proclamation. |
| 1863 | July 1 | Battle of Gettysburg (July 1-3). |
| 1863 | November 19 | President Abraham Lincoln delivers The Gettysburg Address. |
| 1865 | April 4 | President Abraham Lincoln visits the captured capital of the Confederacy, Richmond, Virginia. |
| 1865 | April 14 | Abraham Lincoln is shot by John Wilkes Booth while watching a play at Ford's Theater. |
| 1865 | April 15 | President Abraham Lincoln dies from a gunshot wound to the head he received the night before at Ford's Theatre. He and his wife Mary Todd Lincoln were watching a play when John WIlkes Booth, an actor, shot the President in the back of the head. |
| 1865 | April 21 | Lincoln's funeral train departs Washington, DC. |
| 1865 | May 4 | Lincoln is buried in Springfield, Illinois. |