WOAD or Woad may refer to:

• Woad, the common name of the flowering plant Isatis tinctoria in the family Brassicaceae
• WOAD (AM), a radio station (1300 AM) licensed to Jackson, Mississippi, United States
• WZNO, a radio station (105.9 FM) licensed to Pickens, Mississippi, United States, which held the call sign WOAD-FM from January 2004 to July 2009

Isatis tinctoria, with woad or glastum as the common name, is a flowering plant  in the family Brassicaceae. It is commonly called dyer's woad. It is occasionally known as Asp of Jerusalem. Woad is also the name of a blue dye produced from the leaves of the plant.