Robert Peter Tristram Coffin (March 18, 1892 – January 20, 1955) was an American poet, educator, writer, editor and literary critic. Awarded the Pulitzer Prize for Poetry in 1936, he was the poetry editor for Yankee magazine.^[1]

Born Robert Peter Coffin, the youngest of ten children to James William Coffin, a descendant of Tristram Coffin and Alice Mary Coombs on a saltwater farm on Sebascodegan Island he earned his undergraduate degree from Bowdoin College in 1913 and then his Masters of Arts from Princeton University in 1918.^[1] In 1922 Coffin was awarded the degree of Doctor of Literature by Trinity College, Oxford where he was a Rhodes Scholar. He won the Pulitzer Prize for Poetry in 1936.^[2]

Coffin served with the US Army in World War I. When he returned he taught English at Wells Preschool and then as the Pierce Professor at Bowdoin College.^[1]

Modeled after his friend and fellow poet Robert Frost's Bread Loaf Writers' Conference, Coffin was the co-founder with Carroll Towle of the Writers' Conference of the University of New Hampshire in 1956.^{[clarification needed][3][1]}

Coffin also illustrated many of his books.

Coffin died of a heart attack in Harpswell, Maine, on January 20, 1955, at the age of 62. He is buried in the Cranberry Horn Cemetery in Harpswell.