St. Monica Academy is a private, independent Roman Catholic high school in Montrose, California.

It is operated independently of the Roman Catholic Archdiocese of Los Angeles.

[3] St. Monica Academy, a classical Catholic school in the Los Angeles area for grades 1-12, was established in 2001 by lay parents.

[4] While not under the direct authority of the Los Angeles Archdiocese, the academy does have Archdiocesan approval similar to other private, Catholic schools in the area.

From 2001 until 2015, St. Monica Academy was the tenant of Neighborhood Unitarian Church in Pasadena, CA.