Chicago a cappella is an American classical vocal ensemble founded in 1993 by Jonathan Miller.

[1][2][3][4] The artistic director, Jonathan Miller, founded the ensemble in 1993 by performing as a low bass and directing rehearsals for the group's first 14 seasons.

One of the founding ensemble members, Matthew Greenberg, joined the administrative staff in 1995 and presently serves as the organization's Executive Director.

[5] The organization's audiences have actively grown since the ensembles formation and an ensemble of about ten singers typically perform in a wide array of concert programs each year in Chicago, Evanston, Naperville, and Oak Park, IL.

Chicago a cappella has presented new music from composers such as Joseph Jennings, Chen Yi, Stacy Garrop, Rollo Dilworth, Tania León, and Ezequiel Viñao.