Simon Hullihen (/hʌllɪhɛn/ HULL-i-hen) MD, DDS (December 10, 1810 – March 27, 1857) was a dental surgeon born in Point Township, Pennsylvania.
He obtained his MD from Washington Medical College, in Baltimore in 1832, and also started his career as an instructor there but eventually moved to Canton, Ohio to practice medicine.
He then moved to Pittsburgh where he met his future wife Elizabeth, whom he married in 1835, they planned to relocate to Kentucky but Simon became too ill to complete the journey.
Hullihen's practice in Wheeling gained him accord with other local physicians and he became well known for his pioneering work on the treatment of cleft lip and palate.
Due to his achievements, American Association of Oral and Maxillofacial Surgeons dedicated its 55th annual meeting to Hullihen's memory.