Thomas Henry Blythe (born Thomas Williams; 1822–1883), was a Welsh-born American businessman; he became a successful self-made capitalist and tycoon after emigrating to San Francisco in the United States. Blythe is most remembered for purchasing, developing, and subdividing the Palo Verde Valley in southern California, and obtaining primary rights to Colorado River water to irrigate the valley. The city of Blythe, California, the largest city in the Palo Verde Valley, is named for him.