Arthur Alexander Johann Milchhöfer (March 21, 1852 – December 7, 1903) was a German archaeologist born in Schirwindt, East Prussia, a village in the easternmost corner of the German Reich.
He specialized in studies of Greek Antiquity, and is remembered for his topographical research of ancient Attica.
He studied in Berlin and at the University of Munich, where he was a student of Heinrich Brunn (1822–1894).
Subsequently, he became an assistant to Ernst Curtius (1814–1896) in Berlin, and in 1883 was habilitated for archaeology at the University of Göttingen.
Later on, he was an associate professor at the University of Münster, where he was also in charge of the library of classical archaeology.
In 1895 he became a professor of archaeology at the University of Kiel.