Alejandro Acuna aka Alex Acuna (born December 12, 1944) is a Peruvian drummer and percussionist.

Born in Pativilca, Peru, Acuna played in local bands from the age of ten, and moved to Lima as a teenager. At the age of eighteen he joined the band of Perez Prado, and in 1967 he moved to Puerto Rico. In 1974 Acuna moved to Las Vegas, working with artists such as Elvis Presley and Diana Ross, and the following year he joined the jazz-fusion group Weather Report, appearing on the albums Black Market and Heavy Weather. Acuna left Weather Report in 1978, and became a session musician in California, recording and playing live with (amongst many others) Paul McCartney, Joni Mitchell, Ella Fitzgerald, Chick Corea, Whitney Houston, Phil Keaggy, Sam Phillips, former Weather Report bandmates Wayne Shorter and Joe Zawinul, Herbie Hancock, Carlos Santana, Antonio Carlos Jobim, Beck, Roberta Flack and Al Jarreau.