Friedrichsruh (German pronunciation: [fʁiːdʁɪçsˈʁuː] ) is a district in the municipality of Aumühle, Herzogtum Lauenburg district, Schleswig-Holstein, in northern Germany. Friedrichsruh manor is known as a residence of the princely House of Bismarck, mainly of Chancellor Otto von Bismarck from 1871 onwards.