William Hatton (June 9, 1849 – October 22, 1894) was an American businessman in Carmel Valley, California.

He was manager of the dairy and cattle interests of the Pacific Improvement Company,[1] acquired land of his own, and became one of the wealthiest dairymen in Monterey County.

[2] William Hatton was born on June 9, 1849, in Aghowle, County Wicklow, Ireland, fourth in a family of eight children.

He left Ireland at age thirteen and went to sea as an apprentice sailor.

[4] In 1888, the Pacific Improvement Company hired Hatton to manage two large Del Monte dairies, the Rancho Cañada de la Segunda in lower Carmel Valley and the ranching operations of Rancho Los Laureles in the upper Carmel Valley that the company purchased in 1882.