Fremont D. Orff was an American architect.
He worked together with his architect brother George W. Orff and also partnered with Edgar E. Joralemon as Orff & Joraleman.
He also partnered with Ernest F. Guilbert as Minneapolis-based Orff & Guilbert.
A number of his works are listed on the U.S. National Register of Historic Places.
Works include (with attribution):