Thad is a masculine given name, often a short form (hypocorism) of Thaddeus.
Thad may also refer to:
Typhoon Thad, a 1981 typhoon that impacted Japan and its environs Transient hepatic attenuation differences, abbreviated THAD, areas of enhancement during the arterial phase of contrast CT of the liver Terminal High Altitude Area Defense, abbreviated THAAD, an American anti-ballistic missile defense system