CW3 or CW-3 may refer to:
CW3, a postcode district in the CW postcode area in Cheshire, England CW-3 or Chief Warrant Officer 3, a United States military rank CW-3 Duckling, a two-seat amphibian flying-boat KDLH, a TV station in Duluth, Minnesota and Superior, Wisconsin affiliated with The CW Creeper World 3, the third installment in the Creeper World series