Adolf Hofer (17 August 1868 in Pleinlauken, Province of Prussia – 3 September 1935 in Berlin) was a Prussian Junker and a Social democratic politician.
In 1889, he joined Social Democratic Party of Germany (SPD), a rather unusual choice for landed nobility of Prussia.
He owned and operate the manor until 1913 when he sold it to live as privateer on the estate of his wife in Pleinlauken.
He was expelled from the SPD fraction in 1917 due to his proximity to the rival USPD for which he became a leading member.
Along with Otto Braun (SPD), Hofer (for USPD) was until 4 January 1919 director of the Agricultural Ministry in the Prussian Rat der Volksbeauftragten.