Birthdays
James McNair Baker
Turns 39 on this date
George Griffin George
Turns 38 on this date
Arminius Summerfield Hank
Turns 29 on this date
James Ross Irvine
Turns 47 on this date
John Marshall Jones
Turns 40 on this date
John Linn McKim
Turns 47 on this date
Omsby MacKnight Mitchel
Turns 55 on this date
Nicholas Bartlett Pearce
Turns 32 on this date
James Alexander Ventress Pue
Turns 19 on this date
Events
| Science/Technology | An exceptionally large and bright meteor streaks across the northern areas of the United States | 07/20/1860 |
| Business/Industry | In Denver, a banking company begins producing pure gold coins at a privately owned mint | 07/20/1860 |
| Battles/Soldiers | In Nevada, following the Pyramid Lake War, regular troops start a permanent fort on the Carson River | 07/20/1860 |
| US/the World | On Sicily, Garibaldi defeats Neapolitan forces at Melazzo and takes the town |
07/20/1860 to 07/21/1860 |
| Religion/Philosophy | The Evangelical Lutheran Church establishes a Synod for Georgia and Florida | 07/20/1860 |
| Religion/Philosophy | Under the Islamic Calender, Muharram begins the new year 1277 | 07/20/1860 |
Documents
| Newspaper | Chicago (IL) Press and Tribune, “The Dred Scott Decision in Practice,” July 20, 1860 | 07/20/1860 |