Andrew Watson "Butch" Armour III (October 22, 1908 – December 27, 1991) was a member of the prominent Armour family of meatpacking fame (Armour and Company), a company president, and notable philanthropist who, together with his wife Sarah Wood Armour, gave millions of dollars to Princeton University, St. Mark's School, Chicago's Field Museum of Natural History, and other charitable causes.
He attended St. Mark's School, then went to Princeton University, dropping out in his junior year.
Armour worked for his family's company for a decade, then joined the Huck Manufacturing Co., eventually rising to the position of president.
He gave millions more to St. Mark's School, where the athletic cage and an endowed teaching position is named in his honor.
Armour was also a major contributor for many years to Chicago's Field Museum of Natural History, where the A. Watson Armour III Spring Symposia are named in his honor.