Acer often refers to:

• Acer (plant), the genus of trees and shrubs commonly known as maples
• Acer Inc., a computer company in Taiwan

Acer may also refer to:

• David Acer (born 1970), Canadian stand-up comedian and magician
• David J. Acer (1949–1990), American dentist
• Ebru Acer (born 2002), Turkish female para table tennis player

• European Union Agency for the Cooperation of Energy Regulators, an agency
• Armored Combat Engineer Robot, a military robot created by Mesa Robotics
• Australian Council for Educational Research, research organization based in Camberwell, Victoria

• ACerS, the American Ceramic Society
• Jude Acers (born 1944), American chess master