O'Neill is a surfwear and equipment brand that was started in San Francisco, California, but soon moved down the coast to Santa Cruz. Some credit O'Neill with having invented the modern wetsuit. They now also make clothing and their clothing division is headquartered in Irvine, California with their surf division still in Pleasure Point, Santa Cruz.

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 the 1950s, Jack O'Neill opened his first surf shop in a garage across the Great Highway in San Francisco, a sand dune away from his favorite bodysurfing break. Jack created the modern-day surf shop. While Da..