Others
- James Martin (chef) (born 1972), British celebrity chef
- Sir James Martin (engineer) (1893–1981), inventor of the modern aircraft ejection seat
- James Ranald Martin (1796–1874), surgeon in India
- James R. Martin (born 1951), producer and director of documentaries Wrapped In Steel and Fired-up!
- James Slattin Martin, Jr. (1920–2002), project manager for the Viking program
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