Aho is a Finnish Laine type surname meaning "glade". Notable people with the surname include:

• Aimo Aho (1951–2014), Finnish javelin thrower
• Alfred Aho (born 1941), Canadian computer scientist
• Bill Aho (born 1957), American businessman
• Claire Aho (1925–2015), Finnish photographer
• Eero Aho (born 1968), Finnish actor
• Eric Aho (born 1966), American painter
• Esko Aho (born 1954), former prime minister of Finland
• Heikki Aho (filmmaker) (1895–1961), Finnish film director, of Aho & Soldan film production company
• Heikki Aho (footballer) (born 1983), Finnish footballer
• Joni Aho (born 1986), Finnish footballer
• Juhana Aho (born 1993), Finnish ice hockey player
• Juhani Aho (1861–1921), Finnish writer
• Junior Aho (born 1999), French American football player
• Jussi Halla-aho (born 1983), Finnish politician
• Jussi Hauta-aho, Finnish rapper known as Kube
• Jyrki Aho (born 1974), former Finnish ice hockey player
• Kaarina Aho (1925–1990), Finnish ceramist and designer
• Kalevi Aho (born 1949), Finnish composer
• Matti Aho (1934–1984), Finnish boxer
• Matti Luoma-aho (1885–1943), Finnish politician
• Martti Johannes Aho (1896–1986), Finnish colonel
• Martti Korkia-Aho (1930–2012), Finnish politician
• Ninos Aho (1945–2013), Assyrian poet and activist
• Paavo Aho (1891–1918), Finnish athlete
• Pascal Aho, Beninese sprinter
• Peter Aho, (born 2003), Nigerian cricketer
• Petri Aho, Finnish guitarist
• Raila Aho (born 1937), Finnish politician
• Sebastian Aho (ice hockey, born 1997), Finnish ice hockey player
• Sebastian Aho (ice hockey, born 1996), Swedish ice hockey player
• Seppo Aho, (born 1944), Finnish pentathlete
• Susan Aho (born 1974), Finnish singer-songwriter and member of Värttinä
• Teppo Hauta-aho (1941–2021), Finnish musician
• Tommy Mansikka-Aho, Finnish musician
• Tuomas Aho (born 1981), Finnish footballer
• Viljo Aho, (1932–2013), Finnish boxer
• Wayne Sulo Aho (1916–2006), American contactee