The Liberal Democratic Party (Liberaldem Partei) was one of the three major political parties in a German state known as the Duchy of Brunswick, also called Braunschweig. Founded in 1836, it was the opposition party and held about one-third of the seats in the upper house of the Landtag.
When Braunschweig became a state of the German Empire in 1871, the party was reformed as the local branch of the Liberal Democratic Party of Germany. It existed during the Weimar Republic era after World War I before being dissolved in 1933 when the Nazi Party became the only legal party in Germany.