Others
- Richard J. Harrison (born 1949), British archaeologist and academic
- Richard John Harrison (1920–1999), British anatomist and marine biologist
- Richard Harrison (scientist), professor at the Rutherford Appleton Laboratory in the United Kingdom
- Richard "Rickey" Harrison (c. 1893–1920), member of the Hudson Dusters street gang in New York City
- Dick Harrison (born 1966), Swedish professor of history
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