Erwin Barth (28 November 1880 – 10 July 1933) was a German landscape gardener and architect.

His work was part of the architecture event in the art competition at the 1928 Summer Olympics.

A year after the birth of his sister Frieda in 1882, his father died from tuberculosis.

He wanted to find an education that would allow him to work and earn for the family, so he decided to train as a garden architect at the Royal Gardening College near Potsdam which did not require an Abitur (degree) but required a two-year apprenticeship for which he joined the commercial gardening company of Philipp Paulig in Lübeck in 1897-1899 and then at J. Timm and Co. in Elmshorn.

He married Elisabeth Frenkel of Göttingen in 1910 Barth and they had a son and a daughter.