Allenby is a surname of English origin. Notable people with the surname include:

• Edmund Allenby, 1st Viscount Allenby (1861–1936), British Army field-marshal
  • Named for the above:
  • Allenby Street, Tel Aviv, Israel
  • Allenby Bridge between Jordan and West Bank.
  • Allenby Square, name given in succession to two squares in Jerusalem
  • Allenby Camp, site of a former British Army camp in Jerusalem
  • Allenby Garden in Beersheba
  • Foch-Allenby, neighborhood in Beirut Central District
  • Allenby, British Columbia, Canada (adjacent Allenby Lake was named for the town, not Lord Allenby)
  • Allenby Junior public school, Toronto, Ontario, Canada
• Braden Allenby (born 1950), American environmental scientist
• Cecil Allenby (1873–1932), English cricketer
• Dudley Allenby, 2nd Viscount Allenby (1903–1984), British soldier
• Jim Allenby (born 1982), Australian cricketer
• Kate Allenby (born 1974), British modern pentathlete
• Michael Allenby, 3rd Viscount Allenby (1931–2014), British soldier
• Nicholas Allenby SSM (1909-1995), Anglican bishop in Malaysia
• Peggy Allenby (1901–1966), American silent film, television and radio actress
• Robert Allenby (born 1971), Australian golfer
• Allenby Chilton (1918–1996), English footballer
• Allenby Beardsley, fictional character in Japanese anime television series Mobile Fighter G Gundam

A common variant is "Allanby":

• Nick Allanby (born 1957), Australian cricketer
• Richard Allanby (born 1971), Australian cricketer