The German Democratic Party was a liberal political party in the Weimar Republic, considered centrist or centre-left. Along with the right-liberal German People's Party, it represented political liberalism in Germany between 1918 and 1933. It was formed in 1918 from the Progressive People's Party and the liberal wing of the National Liberal Party, both of which had been active in the German Empire.

Centrism is a political outlook or position involving acceptance or support of a balance of social equality and a degree of social hierarchy while opposing political changes that would result in a significant shift of society strongly to the left or the right.