- Jul 7 David Herold, American pharmacist's assistant who was part of the conspiracy to assassinate Abraham Lincoln, executed by hanging at 23
- Jul 7 George Atzerodt, American conspirator who failed to attempt an assassination of Vice President Andrew Johnson on the night Abraham Lincoln was murdered, executed by hanging at 30
- Jul 7 Lewis Powell, American Confederate soldier who was part of the conspiracy to assassinate Abraham Lincoln and who attempted to kill Secretary of State William H. Seward, executed by hanging at 21
- Jul 7 Mary Surratt, American boarding house owner who was part of the conspiracy to assassinate Abraham Lincoln, executed by hanging at 42 or 45. She becomes the first woman executed by the US government.
- Jul 15 Reinier C. Bakhuizen van de Brink, Dutch historian, dies at 55
- Jul 24 Johan Filip von Schantz, Finnish violinist, conductor, and composer (Kullervo), dies of typhus at 30
- Jul 25 James Barry [Margaret Ann Bulkley], British military surgeon and the 1st woman in Great Britain to become a qualified medical doctor, dies at 66 or 67
- Jul 30 George Wright, US Union brigadier general, dies at 61
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning