Aidan Vass (b. 2003) is an American composer of contemporary classical music. His music has been performed by soloists and ensembles around the world, including performances at the Walt Disney Concert Hall and the Vatican.

Vass has written music for ensembles including the Los Angeles Philharmonic, San Gabriel Valley Symphony, Los Angeles Master Chorale, Seraphour, Sandbox Percussion, and Tallgrass Chamber Choir, and he has independently released a catalog of music including a full length debut solo piano album (8 Sketches for Piano, 2021). He was a composer fellow with the Los Angeles Philharmonic from 2018-2021, and his composition mentors have included Andrew Norman, Ted Hearne, Sir James MacMillan, and Sarah Gibson. He is currently published with Hal Leonard and Santa Barbara Music Publishing, and his music has also been featured on magazines and publications such as Gramophone, The Violin Channel, Serenade Magazine, Pizzicato Magazine, Planet Hugill, and others.

Vass is also the co-founder of the music review platform Musotic, as well as the founder of the generative music company Cleome. Vass is a graduate of the UCLA Herb Alpert School of Music.