- Jun 7 Franz Xaver Gruber, Austrian organist and composer (Silent Night), dies at 75
- Jun 9 Benjamin Franklin "Grimes" Davis, Union major, dies in battle at 30
- Jun 17 Isham W Garrott, American attorney and Confederate brigadier general, dies in battle
- Jun 26 Andrew Hull Foote, American Rear Admiral (Union Navy), dies at 56
- Jun 27 Martin E Green, Confederate brigadier general, shot dead at 38