- Jul 13 James Alexander Seddon, politician and lawyer (Confederate Secretary of War, 1862-65), born in Falmouth, Virginia (d. 1880)
- Jul 21 Stewart Van Vliet, American Brevet Major General (Union Army), born in Ferrisburgh, Vermont (d. 1901)
- Jul 24 Arnaud-Michel d'Abbadie, French explorer (Ethiopia), born in Dublin, Ireland (d. 1893)
- Jul 28 Stefan Dunjov, Banat Bulgarian military figure (d. 1889)
- Jul 30 Thomas Jackson Rodman, American Brevet Brigadier General (Union Army), inventor of the rodman gun and perforated-cake gunpowder, born in Salem, Indiana (d. 1871)