Rozalie Hirs (born 1965) is a Dutch composer and poet. From 1983 to 1990 she completed her chemical engineering studies at the University of Twente and only thereafter enrolled at the conservatory. From 1991 to 1994 she studied composition with Diderik Wagenaar and from 1994 to 1998 with Louis Andriessen at the Royal Conservatory in The Hague. From 1991 to 1992 she studied classical singing at the Utrecht Conservatory with Eugenie Ditewig and from 1992 to 1994 in The Hague with Gerda van Zelm. From 1999 to 2002, with a Fulbright fellowship, Hirs studied composition with French spectralist Tristan Murail at Columbia University in New York. In 2007 she received the title Doctor of Musical Arts for her dissertation on contemporary (including spectral) composition techniques and the use of the software OpenMusic, for which she received a grant from the Prince Bernhard Cultural Fund. 

In 2005 and 2006, together with Tristan Murail and the Nieuw Ensemble, among others, she taught the course she developed called "OpenMusic and contemporary compositional techniques" at the Conservatorium van Amsterdam. In 2002 she received the Boris and Edna Rapoport Prize from Columbia University for Book of mirrors. In 2007, the electroacoustic composition Pulsars (2007) was chosen as 'Recommended work' at the 11th International Rostrum of Electroacoustic Music (IREM). Roseherte was selected for Toonzetters 2009 as one of the ten finest works of the previous year. In 2010, Venus for percussion ensemble and electronic sounds was premiered at the Holland Festival. Her scores are published by Donemus/Muziek Centrum Nederland, Amsterdam. Hirs is also a poet and published 1992 her first poems in the literary magazine De Revisor. In 1998 her first collection Locus appeared, followed by Logos (2002), [Speling] (2005) and Geluksbrenger (2008).