Harbour City Opera (HCO) is an opera company in Sydney, Australia, presenting chamber opera performances from the mainstream operatic repertoire. The company was founded in early 2013 to provide opportunities for opera singers on the cusp of a professional career and other professionals in the field, and to engage an audience outside the traditional opera circles. HCO's founder and creative director, Sarah Ann Walker, has been nominated for the 2014 Telstra Business Women’s Awards. The board of Harbour City Opera includes Wagnerian tenor Glenn Winslade and singer and pianist Glenn Amer.