Josef Dachs (30 September 1825 – 6 June 1896) was an Austrian pianist and music teacher born in Regensburg.
He received his music education by Simon Sechter and Carl Czerny, worked as a concert pianist and premiered many of his works.
He became professor at the Vienna Conservatory in 1850.
Among others, he taught Vladimir de Pachmann, Isabelle Vengerova, Hugo Wolf, Ferdinand Löwe, and Russian pianist and composer Josef Rubinstein (1847-1884).
Hans Rott composed a work for string orchestra, Dachs-Studien.
Its main melodic theme is based on the letters D A C H S.