Birthdays
Frederick Ferdinand Low
Turns 32 on this date
George W. Smith Jr.
Turns 26 on this date
William Almon Wheeler
Turns 41 on this date
Events
| Education/Culture | Brooklyn Excelsiors leave on the first baseball tour | 06/30/1860 |
| US/the World | First Japanese diplomatic mission to the United States departs for home from New York City | 06/30/1860 |
| US/the World | Murillo's "Our Lady of the Immaculate Conception" sells at auction in London for 9000 guineas | 06/30/1860 |
| Business/Industry | New York and New Yorkers worth $577,230,656.97 in 1860 say city Tax Commissioners | 06/30/1860 |
| Science/Technology | Scientists clash at Oxford University in the first debates on Charles Darwin's theories of evolution | 06/30/1860 |
| Education/Culture | State statistics number the 1886 enrolled students of the College of New Jersey at 238. | 06/30/1860 |
Documents
| Newspaper | Boston (MA) Advertiser, “Relations with Japan in Jeopardy,” June 30, 1860 | 06/30/1860 |