- Jun 3 Julius Reubke, German organist, pianist, and composer (Sonata on the 94th Psalm in c), dies of tuberculosis at 24
- Jun 4 J. Pinckney Henderson, American lawyer and politician (1st Governor of Texas, 1846-47; US Senator from Texas, 1857-58), dies at 50
- Jun 10 Robert Brown, Scottish botanist (discovered 'Brownian Motion'), dies at 84
John Snow (1813-1858)
Jun 16 English physician who studied cholera and is considered the 'Father of modern epidemiology', dies of a stroke at 45