Friedrich St.Florian (born 1932) is an Austrian-American architect. He was born Friedrich St.Florian Gartler in the Austrian city of Graz. He moved to the USA in 1961, and became a naturalized U.S. citizen in 1973.
His generation produced a famous group of Austrian avant-garde architects: Hans Hollein, Walter Pichler, Raimund Abraham. Abraham was also a classmate of St. Florian and has worked with him on multiple occasions.