Surname
- Alan Ashby (born 1951), American baseball player
- Alexander Essebiensis (Alexander of Ashby) (c. 1220), English theologian and poet
- Andy Ashby (born 1967), American baseball player
- Carl Ashby (born 1914), American abstract expressionist artist
- Christopher C. Ashby American ambassador to Uruguay, 1997 to 2001
- David Ashby (born 1940), British Conservative Member of Parliament 1983–1997
- Debee Ashby (born 1967), British adult model
- Dorothy Ashby (1932–1986), African American jazz harpist and composer
- Earl Ashby (born 1921), Cuban baseball player
- Edwin Ashby (1861–1941), Australian malacologist and ornithologist
- Eric Ashby, Baron Ashby (1904–1992), British botanist and educator
- George Ashby (martyr) (died 1537), martyred English monk
- Hal Ashby (1929–1988), American film director
- Irving Ashby (1920–1987), American jazz guitarist
- Jeffrey Ashby (born 1954), American naval aviator and astronaut
- John Ashby (Royal Navy officer) (1640–1693), English admiral during the War of the League of Augsburg
- John Ashby (militiaman) (18th century), colonel in the Virginia Militia
- Joseph Ashby-Sterry (c. 1837 – 1917), English poet and novelist
- Linden Ashby (born 1960), American actor
- Margery Corbett Ashby (1882–1981), British feminist and internationalist
- Peter Ashby, British musician and composer
- Ray Ashby, British rugby league footballer
- Thomas Ashby (1874–1931), British archaeologist and architectural historian of ancient Rome
- Turner Ashby (1828–1862), Confederate cavalry general in the American Civil War
- William Ross Ashby (1903–1972), English psychiatrist and founder of the English school of cybernetics
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