Josef Seger (born Josef Ferdinand Norbert Segert, last name also Seeger or Seegr) (21 March 1716 – 22 April 1782) was a Bohemian organist, composer, and educator. After graduating in philosophy from the Charles University in Prague and studying music under Bohuslav Matěj Černohorský, Jan Zach, and others, Seger became organist of two churches in Prague and remained there until his death.