Others
- Thomas Walker (academic) (died 1665), English academic at Oxford University
- Thomas Walker (explorer) (1715–1794), American explorer
- Thomas Walker (Bush family) (1758–1799), English ancestor of Bush family
- Thomas A. Walker (1828–1889), English civil engineering contractor
- T. B. Walker (1840–1928), Minneapolis businessman who founded the Walker Art Center
- Thomas Glynn Walker (1899–1993), United States federal judge
- Thomas Walker (naval officer) (1919–2003), U.S. Navy officer
- Thomas Walker (attorney) (born 1964), U.S. attorney
- Thomas D. Walker (born 1956), associate professor at the University of Wisconsin–Milwaukee
- Thomas Gordon Walker (1849–1917), British Indian civil servant
- Thomas Joseph Walker (1877–1945), Anglo-New Zealand soil scientist
- Thomas J. Walker, namesake of the Thomas J. Walker House in Knoxville, Tennessee
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