Guerilla Opera is an opera company in Boston, Massachusetts founded in 2007 specializing in accessible contemporary chamber operas, several of which have been commissioned by the company. As of 2010 its Artistic Directors were Mike Williams and Rudolf Rojahn, its General Manager was Aliana de la Guardia and its director of design and production was . Guerilla Opera performed in the Zack Box Theater at the Boston Conservatory, where it is a resident ensemble. As of 2018 its Artistic Directors are and Aliana de la Guardia. Guerilla Opera performs in Boston.