Hans Sittner (August 9, 1903 - May 9, 1990) was an Austrian lawyer, music teacher and author, and pianist.
He started his music studies in the local Bruckner-Konservatorium in 1914.
In 1927 he graduated from the Vienna Academy of Music, where he had started studying in 1925.
Sittner was involved with the Mozartgemeinde Wien, where he established the Wiener Flötenuhr prize.
He received a silver Mozarteum Mozart Medal in 1971.