Event of Interest
Jun 1 Lewis and Clark Centennial Exposition opens in Portland, Oregon

Meriwether Lewis

William Clark
- Jun 6 French Foreign minister Delcasse resigns on German request
- Jun 7 Norway dissolves union with Sweden (in effect since 1814)
Event of Interest
Jun 8 US President Theodore Roosevelt sends identical notes to Japan and Russia urging them to negotiate and end hostilities, offering his personal services

Theodore Roosevelt
- Jun 9 British Open Men's Golf, St Andrews: Scotsman James Braid wins his 2nd Open title 5 strokes ahead of runners-up Rowland Jones and J.H. Taylor
- Jun 10 1st forest fire lookout tower placed in operation, Greenville, Maine
- Jun 11 Penns Railroad debuts fastest train in world (NY-Chicago in 18 hrs)
- Jun 13 NY Giant Christy Mathewson 2nd no-hitter, beats Chicago Cubs, 1-0
- Jun 24 US National Championship Women's Tennis, Philadelphia CC: Elisabeth Moore wins her 4th US singles title; beats Helen Homans 6-4, 5-7, 6-1
- Jun 25 Warsaw & Lodz revolt against Russian occupation
- Jun 27 Russian sailors mutiny aboard battleship "Potemkin" and sail for Odessa
- Jun 30 In Russia, the "Potemkin" arrives at Odessa, where sailors take the bodies of dead crewman ashore; sailors join civilians in revolutionary actions of the '1905 Revolution'
- Jun 30 The crew of the Russian battleship "Georgei Pobiedonosets" mutinies in support of the "Potemkin", which mutinied three days earlier
- Jun 30 Conservative Australian Prime Minister George H. Reid is forced to resign and Alfred Deakin returns to power on July 5