Walter Jr. may refer to
People Walter Bishop Jr. (1927–1998), an American jazz pianist Walter P. Chrysler Jr. (1909–1988), an American art collector and museum benefactor Walter Cronkite (full name Walter Leland Cronkite Jr., 1916–2009), an American broadcast journalist Walt Frazier (full name Walter Frazier Jr., born 1945), an American former basketball player Walter A. Haas Jr. (1916–1995), chairman of Levi Strauss & Co from 1970 to 1981 Walt Lemon Jr. (born 1992), an American professional basketball player Walter M. Miller Jr. (1923–1996), an American science fiction writer Wally Schirra (full name Walter Marty Schirra Jr., 1923–2007), an American naval aviator, test pilot, and NASA astronaut Walter Scott Jr. (1931–2021), an American civil engineer Walter White Jr., fictional character debuted in 2008 in Breaking Bad
Other Walter Junior, a 1930s Czech aero-engine also built under license as the P.Z. Inż. Junior