Others
- James Richardson (Cisco), Canadian businessman with Cisco Systems
- James Richardson (explorer of the Sahara) (1809–1851), British
- James Richardson (poet) (born 1950), American poet
- James Richardson (Toronto hotelier), died 1904, see Spadina Hotel
- James T. Richardson, American sociologist who wrote extensively about new religious movements, popularly called cults
- James Richardson (television presenter), British television presenter associated with Italian football
- James Armstrong Richardson, Sr. (1885–1939), Canadian businessman
- James Scott Richardson (born 1974), Canadian white supremacist
- James Richardson Corporation, Australian corporation involved with furniture, hospitality, real estate, and the duty free retail businesses
- Jim Richardson (born 1941), English jazz bassist and session musician
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