Landhaus Katharinenhof, Heritage monument in Blankenese, Hamburg, Germany.

Landhaus Katharinenhof is a two-story villa built in 1836 by Ole Jørgen Schmidt and Johann Matthias Hansen in the late Neoclassical style. Its plastered upper floors rest on a rectangular sandstone base, and a portico fronts the building. A coach house stands beside it at Mühlenberger Weg 35.

The Altona merchant Georg Friedrich Baur acquired the land between 1802 and 1817. In 1836 Ole Jörgen Schmidt and Johann Matthias Hansen built the porticoed villa with its stable. In 1921 the Baur family sold the estate to the navigator Leonhard Rudolf Müller, who named it after his daughter Katharina. From 1941 it housed Luftgaukommando XI, after 1945 it sheltered displaced persons and bomb victims, and from 1950 it served as Blankenese's local office.

The name Katharinenhof comes from Katharina, daughter of the navigator Leonhard Rudolf Müller, who bought the estate in 1921. The house later served as a local office for Blankenese, and the coach house at Mühlenberger Weg 35 housed the public library from 1955 to 2005.

The villa stands at Mühlenberger Weg 35 in Blankenese; the adjacent coach house served as the public library from 1955 to 2005. From the Blankenese S-Bahn station the walk takes about 15 minutes. The building is not open to the public, so it is seen from the street.

King Christian VIII of Denmark and Norway visited the villa in 1840 during a tour of his provinces. This royal visit made the house a noteworthy place in the local history of Blankenese.