Mendizabal or Mendizábal is a Basque surname meaning 'wide mountain'. It may refer to:

• Concepción Mendizábal Mendoza (1893–1985), first female civil engineer in Mexico
• Enrique Mendizabal (1918–2017), Olympic Shooter for Peru at the 1948 London Games
• Eustakio Mendizabal (1944–1973), Basque separatist
• Félix Mendizábal (1891–1959), Spanish athlete
• Gabriel de Mendizabal Iraeta (1765–1838), general during the Napoleonic Wars
• Guillermo Mendizábal (born 1954), retired Mexican footballer and manager
• Horacio Mendizábal (1847–1871), Argentinian poet
• Ignacio Uría Mendizábal (1938–2008), Basque businessman, head of construction company, Altuna y Uría
• Itziar Mendizabal (born 1981), ballet dancer
• José María Álvarez Mendizábal (1891–1965), Spanish politician and lawyer
• Joxe Mendizabal (born 1970), Basque musician
• Juan Álvarez Mendizábal (1790–1853), Spanish economist and politician
• Luis A. Aranberri Mendizabal "Amatiño" (born 1945), Basque media professional
• Mamen Mendizábal (born 1976), Spanish television and radio journalist
• Mariano Juaristi Mendizábal (1904–2001), Azkoitian Basque pelota player known as Atano III
• Rafael de Mendizábal Allende (1927–2023), Spanish judge
• Ramón de Mendizábal (1914–1938), Spanish footballer
• Ricky Mendizábal (born 1997), Spanish-Equatoguinean basketball player
• Rosendo Mendizabal (1868–1913), born in Buenos Aires, Argentina
• Sergio Mendizábal (1920–2005), Spanish actor