Walter Borho (born 1945) is a German mathematician, who works on algebra and number theory. He is retired as a University Professor at the University of Wuppertal.
Borho was born in 1945 in Hamburg. He received his PhD in 1973 from the University of Hamburg under the direction of Ernst Witt with a thesis titled Wesentliche ganze Erweiterungen kommutativer Ringe.
In 1986 he was an invited speaker at the International Congress of Mathematicians in Berkeley, California.