Peter Sillence Fleming (November 23, 1928 – January 8, 1956) was a Christian who was one of five missionaries killed while participating in Operation Auca, an attempt to evangelize the Huaorani people of Ecuador.

At Queen Anne High School, Fleming earned letters in basketball and golf and graduated as valedictorian of his class.

He was very driven in college, working part-time and dedicating much time to prayer and Bible study, as well as keeping up on his classes.

Fleming met Jim Elliot during many conferences and mountain climbing expeditions arranged by a large Christian organization.[which?]

Elliot had a great deal of influence on Fleming and was largely responsible for his becoming a missionary and for his decision to (temporarily) break off his engagement to Olive Ainslie, a childhood friend, so that he might serve without the responsibilities of home life at least for the first year of missionary service.