Sarah Nemtsov (née Reuter, born 28 May 1980) is a German composer.
Nemtsov was born in Oldenburg and started her music lessons and composing aged eight. She started playing the oboe aged 14.
She studied composition under Nigel Osborne and Johannes Schöllhorn, and oboe under Klaus Becker, at the Hochschule für Musik und Theater Hannover. At the Universität der Künste Berlin, she continued her oboe studies under Burkhard Glaetzner, and her composition at post-graduate level with Walter Zimmermann.
Her second opera, L'Absence, to her own libretto after Edmond Jabès was premiered at the 2012 Munich Biennale.
She became a full-time composer in 2007. She is married to the pianist and musicologist Jascha Nemtsov.