Wadd is the pre-Islamic Arabian god of love and friendship.

Wadd or WADD may also refer to:

People

• Johnny Wadd, a stage name of John Holmes, a pornographic actor and suspect in the 1981 Wonderland murders

• William Wadd (1776-1829), an English surgeon and medical author

Other uses

• Ngurah Rai International Airport, whose International Civil Aviation Organization airport code is WADD

• Wadd: The Life & Times of John C. Holmes, a 1998 documentary film

• Wright Air Development Division (WADD), a forerunner of today's Aeronautical Systems Center, part of the U.S. Air Force