- Jul 1 Robert Stawell Ball, Irish mathematician and astronomer (Ball Screw), born in Dublin, Ireland (d. 1913)
- Jul 4 James McGranahan, American composer, born in Adamsville, Pennsylvania (d. 1907)
- Jul 12 Abraham Goldfaden, Russian-born Jewish poet and playwright (Shulamis), born in Starokostiantyniv, Russian Empire (d. 1908)
- Jul 25 Flora Adams Darling, American writer and historian, founded Daughters of American Revolution, born in Lancaster, New Hampshire (d. 1910)
- Jul 27 Ranald Slidell Mackenzie, American Brevet Major General (Union Army), born in Westchester County, New York (d. 1889)