Elmer H. Antonsen (17 November 1929 – 25 August 2008) was an American philologist who specialized in Germanic studies.

He earned degrees in German at Union College where he took the B.A.

degree, and then at University of Illinois at Urbana–Champaign where he studied under Ernst Alfred Philippson for his doctorate.

His research and publications focused on historical and structural linguistics.

Antonsen died in Urbana, Illinois on 25 August 2008.