Others
- John Walker, one of the Birmingham Six accused of bombings in England in 1974
- John M. Walker (bishop) (1888–1951), Episcopal bishop of Atlanta
- John T. Walker (1925–1989), American Episcopal bishop of Washington
- John Walker (lexicographer) (1732–1807), English lexicographer, actor and philologist
- John Walker (journalist) (born 1977), British video game journalist
- John Walker (industrialist) (1884–1932), Pittsburgh industrialist
- John Walker (Archdeacon of Essex) (died 1588), Anglican archdeacon
- John Walker (scholar) (1692?–1741), English classical scholar and Anglican archdeacon of Hereford
- John Walker (clerical historian) (1674–1747), English clergyman and ecclesiastical historian
- John A. Walker (born 1938), British art critic and historian
- John F. Walker (born 1960), security consultant
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