Colin Tobias Eisler is a German-born American art historian.
His family subsequently moved to the United States, where Eisler received his undergraduate degree from Yale University in 1952.
He studied at Oxford from 1952 to 1953, then completed his master's degree at Harvard University the following year.
Eisler received his PhD from Harvard in 1957, and spent the following year as a Fellow at the Institute for Advanced Study in Princeton, New Jersey.
He was the recipient of a festschrift for his 80th birthday in 2011, when his colleagues published New Studies on Old Masters: Essays in Renaissance Art in Honour of Colin Eisler.