Walter Mondale was raised as a Methodist, the son of a Methodist minister.
Walter Mondale was a Presbyterian as an adult. He was a member of the Westminster Presbyterian congregation.
From: Political Graveyard website (http://politicalgraveyard.com/bio/monaco-monro.html#R9M0J71QX; viewed 29 November 2005):
Mondale, Walter Frederick (b. 1928) - also known as Walter F. Mondale; "Fritz"; "Cavalier" - of Minneapolis, Hennepin County, Minn. Born in Ceylon, Martin County, Minn., January 5, 1928. Married 1955 to Joan Adams. Minnesota state attorney general, 1960-64; delegate to Democratic National Convention from Minnesota, 1960, 1996, 2000, 2004; U.S. Senator from Minnesota, 1964-76; defeated (Democratic-Farmer-Labor), 2002; Vice President of the United States, 1977-81; defeated (Democratic), 1980; Democratic candidate for President of the United States, 1984; U.S. Ambassador to Japan, 1993. Member, Council on Foreign Relations. Still living as of 2004.
Books about Walter Mondale: Findlay Lewis, Mondale: Portrait of an American Politician (out of print); Tom Schneider and Paul Westman, Walter Mondale: Serving All the People (out of print)
From: Peter Roberts, "Walter Frederick Mondale" page in "God and Country" section of "Science Resources on the Net" website (http://www.geocities.com/peterroberts.geo/Relig-Politics/WFMondale.html; viewed 29 November 2005):
Mondale's father was a Methodist minister.
"Today, the religion clauses of the First Amendment do not need to be fixed; they need to be followed." -- address to B'nai B'rith, Washington, D.C., 6 September 1984
"Whatever his private beliefs and religious practice, a president must be the guardian of the laws which ensure America's religious diversity." -- address to B'nai B'rith, Washington, D.C., 6 September 1984