O'Neill is an American surfboard, surfwear and equipment brand started in 1952 in San Francisco, California, which moved down the coast to Santa Cruz by the end of the decade. The company is credited with inventing the wetsuit. Jack O'Neill founded the very first O'Neill company. In 2007, O'Neill Wetsuits Inc. sold the rights to the trademark to Logo International Inc. O'Neill products are distributed internationally by a group of authorized licensed distributors worldwide.
In 1996 O'Neill set up the O'Neill Sea Odyssey, a free, ocean-based program to educate young people about the marine environment.
In Europe, O'Neill is based in Warmond, Netherlands.