Walther Herwig (February 25, 1838, Bad Arolsen, Waldeck – December 16, 1912) was a Prussian administrative lawyer, and the founder of the German fisheries science.
He continued his studies at the universities of Leipzig, Freiburg and Berlin, before entering the Prussian civil service.
He was appointed as a senior government advice in Hanover until his retirement in 1907, when he returned to Berlin.
Amongst his other work in the civil service, Herwig promoted the development of a German high seas fishing industry.
Herwig used this event to propose a restructuring of the German high sea fishing fleet, and in particular for social support for the crews of the ships and action to maintain a supply of appropriately trained manpower to the industry.