Anton Geiss, German spelling Anton Geiß (11 August 1858 in Rettenbach – 3 March 1944 in Schriesheim) was a German politician in the Republic of Baden.
He served on Baden's local legislature, the Landtag, from 1895 to 1903 and from 1909 to 1921.
Geiss also served in a number of executive offices in Baden.
When the Republic was first created in 1918, he became Chairman of the Provisional Government, and on 2 April 1919 he became State President and Head of Government.
This biography article about a member of the Social Democratic Party of Germany (SPD) is a stub.