Ian MacDonald Hummer (born August 23, 1990) is an American professional basketball player for Teksüt Bandirma of the Basketball Super League (BSL).
He previously played professionally with the Monaco, the ratiopharm Ulm, the BG Göttingen and the Nilan Bisons Loimaa.
He is from Vienna, Virginia and played college basketball for the Princeton Tigers.
He was the 2009 The Washington Post Boys basketball Player of the Year for Gonzaga College High School as a senior in high school and the 2013 Ivy League Men's Basketball Player of the Year as a senior in college for Princeton.
At Princeton, he is the second leading scorer (behind Bill Bradley) and fifth leading rebounder in program history.
He led the team to three postseason tournaments and the 2010–11 Ivy League Championship.
He holds the Ivy League record for most single-season and career Player of the Week Awards.
He earned Associated Press 2013 All-American honorable mention recognition.
Both his father, Ed, and uncle, John, are distinguished former Princeton Tigers men's basketball players.
His 2008 Gonzaga team won the District of Columbia championships during his junior year.