Emmi Louise Walther (30 October 1860, Hamburg - 11 September 1936, Dachau) was a German painter, graphic artist and watercolorist.
She was born to a middle-class family and received her first art training from the landscape painter, Friedrich Schwinge.
After completing her studies there, she moved to the artists' colony at Dachau and worked with Adolf Hölzel.
After 1900, she spent time at the artists' colonies in Concarneau and Worpswede; staying with Becker, who had married the painter, Otto Modersohn.
Three years later, she was one of the founding members of the Künstlervereinigung Dachau (Artists' Association), which still exists.