Ashby is a surname. Notable people with the surname include:
Alan Ashby (born 1951), American baseball playerAlexander Essebiensis (Alexander of Ashby) (c. 1220), English theologian and poetAlison Marjorie Ashby (1901–1987), Australian botanical artist and plant collectorAndy Ashby (born 1967), American baseball playerCarl Ashby (1914–2004), American abstract expressionist artistChristopher C. Ashby American ambassador to Uruguay, 1997 to 2001David Ashby (born 1940), British Conservative Member of Parliament 1983–1997Debee Ashby (born 1967), British adult modelDorothy Ashby (1932–1986), African American jazz harpist and composerEarl Ashby (born 1921), Cuban baseball playerEdwin Ashby (1861–1941), Australian malacologist and ornithologistEric Ashby, Baron Ashby (1904–1992), British botanist and educatorGary Ashby, American college baseball coachGeorge Ashby (martyr) (died 1537), martyred English monkHal Ashby (1929–1988), American film directorHarry Ashby (golfer) (1946–2010), English professional golf playerIrving Ashby (1920–1987), American jazz guitaristJeffrey Ashby (born 1954), American naval aviator and astronautJohn Ashby (Royal Navy officer) (1640–1693), English admiral during the War of the League of AugsburgJohn Ashby (militiaman) (18th century), colonel in the Virginia MilitiaJoseph Ashby-Sterry (c. 1837 – 1917), English poet and novelistLinden Ashby (born 1960), American actorMadeline Ashby, American-Canadian science fiction writerMargery Corbett Ashby (1882–1981), British feminist and internationalistPeter Ashby, British musician and composerRay Ashby, British rugby league footballerThomas Ashby (1874–1931), British archaeologist and architectural historian of ancient RomeTurner Ashby (1828–1862), Confederate cavalry general in the American Civil WarWilliam Ross Ashby (1903–1972), English psychiatrist and founder of the English school of cybernetics