Isaac Hoffer Doutrich (December 19, 1871 – May 28, 1941) was a Republican member of the U.S. House of Representatives from Pennsylvania.
He attended Keystone State Normal School in Kutztown, Pennsylvania.
He worked in the retail clothing business in Middletown and Harrisburg, Pennsylvania.
After his time in Congress, he reengaged in the retail clothing business in Harrisburg until his death.
Asked how to say his name, he told The Literary Digest: "Rimes with thou Greek: dou-treek'."