- Jun 7 Alois Hitler, father of Adolf Hitler, born in Strones, Waldviertel, Austrian Empire (d. 1903)
- Jun 8 Jan Kleczyński Sr., Polish painist and composer, born in Janiewicze, Russian Empire (d. 1895)
- Jun 8 Moritz Heyne, German germanist (Beowulf), born in Weissenfels, Germany (d. 1906)
- Jun 16 Eli Long, American Bvt Major General (Union Army), born in Woodford County, Kentucky (d. 1903)
- Jun 17 Strong Vincent, American army officer (died famously at Little Round Top during the Battle of Gettysburg), born in Waterford, Pennsylvania (d. 1863)
Paul Morphy (1837-1884)
Jun 22 American chess player considered the greatest of his era (1857-61), born in New Orleans, Louisiana
- Jun 23 Ernest Guiraud, French opera composer (Piccolino; Sylvie), arranger (Bizet), and teacher, born in New Orleans, Louisiana (d. 1892)
- Jun 26 Martin Davis Hardin II, American Brigadier General (Union Army), born in Jacksonville, Illinois (d. 1923)
- Jun 26 Victor Girardey, Brigadier General (Confederate Army), born in Lauw, France (d. 1864)