James Watts may refer to:

• James Watts (British politician) (1903–1961), Conservative Member of Parliament for Manchester Moss Side 1959–1961
• James Watts (Mayor of Manchester) (died 1878), also High Sheriff of Lancashire and owner of Abney Hall

• James Watts (rugby union) (1878–1933), Wales international rugby union player
• James W. Watts (1904–1994), American neurosurgeon and early pioneer of lobotomy
• KiloWatts (musician) (James Watts, born 1980), Philadelphia-based electronica producer and composer
• James Watts (cricketer) (1835–1919), English cricketer
• James Laurence Watts (1849–1925), sculptor in Queensland, Australia
• James Washington Watts (born 1960), American professor of religion

• James Watt (disambiguation)