Deahl is a surname. Notable people with the surname include:
Dani Deahl, American record producer James Deahl (born 1945), Canadian poet and publisher Joshua Deahl (born 1981), American attorney Robert “Bobby” Deahl, American record producer by the name, Kayoh. Martin Philip Deahl (born 1956). Professor of Psychiatry, Colonel UK Armed Forces
See also Dahl (surname)