June 10 is the 161st day of the year (162nd in leap years). There are 204 days remaining until the end of the year.
- 1825: Princess Hildegard of Bavaria d. 1864
- 1894: Prince Igor Constantinovich of Russia (d. 1918)
- 1921: Prince Philip, Duke of Edinburgh
- 1956: Borwin, Duke of Mecklenburg, head of the House of Mecklenburg-Strelitz
- 1981: Prince Hashim bin Al Hussein
- 1982: Princess Madeleine, Duchess of Hälsingland and Gästrikland
- 323 BC: Alexander the Great, Macedonian king (b. 356 BC)
- 1075: Ernest, Margrave of Austria (b. 1027)
- 1190: Frederick Barbarossa, Holy Roman Emperor (b. 1122)
- 1424: Ernest, Duke of Austria (b. 1377)
- 1974: Prince Henry, Duke of Gloucester (b. 1900)
- 1190: Third Crusade: Frederick I Barbarossa drowns in the river Saleph while leading an army to Jerusalem.
- 1619: Thirty Years' War: Battle of Záblatí, a turning point in the Bohemian Revolt.
- 1719: Jacobite Rising: Battle of Glen Shiel.
- 1967: Wedding of Margrethe, Princess of Denmark, and Henri de Laborde de Monpezat