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:
People
- 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
ACER
- 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