- Jun 5 Telegraph line opens between Philadelphia and Baltimore
- Jun 8 Battle at Gwanga: British troops beat Bantu
- Jun 10 Robert Thomson obtains an English patent on a rubber tyre
- Jun 14 Belgian Liberal Party forms
- Jun 14 California (Bear Flag) Republic proclaimed in Sonoma, declaring independence from Mexico
- Jun 15 Oregon Treaty signed, setting US-British boundary at 49°N
- Jun 19 First officially recognised baseball game (played by Cartwright Rules) - NY Nines 23 defeat Knickerbockers 1 at Hoboken, New Jersey
- Jun 24 Residency tax on Jews of Hungary abolished
- Jun 28 The saxophone is patented by Antoine-Joseph "Adolfe" Sax
Authors
Civil Rights Activists
Inventors
Kings
Revolutionaries
Scientists