Walter Buser (14 April 1926[1] – 17 August 2019)[2] was a Swiss politician from the Social Democratic Party of Switzerland (SDP).

Buser was born in Lausen, Switzerland, the son of a farmer.

He studied at Bâle and at Bern, obtaining a doctorate in law in 1958.

In 1965 he joined the federal administration and spent three years as head of the Legal and Information Service of the Department of Home Affairs.

After the resignation of Chancellor Karl Huber in 1981, Buser campaigned against Joseph Voyame of the CVP and Hans-Ulrich Ernst of the SVP.