Wally, Walt, or Walter Miller may refer to:
Film and television Walt Miller, a character in the TV series New Girl Walter Miller (actor) (1892–1940), American film actor Walter C. Miller (1926–2020), American television director and producer
Politicians Walter Dale Miller (1925–2015), American politician Walter L. Miller (politician) (1830–?), New Brunswick-born Wisconsin politician
Sportspeople Wally Miller (1917–1992), Australian footballer Walt Miller (basketball) (1915–2001), American basketball player Walt Miller (baseball) (1883–1956), American baseball pitcher Walter Miller (American football), American football coach in the United States Walter Miller (footballer) (1882–1928), English footballer Walter Miller (ice hockey) (1887–1959), Canadian ice hockey player Walter Miller (jockey) (1890–1959), American Hall of Fame jockey Walter Miller (rugby league), rugby league footballer of the 1910s for New Zealand, and Wellington Walter Miller (wrestler), Australian middleweight wrestling champion Jake Miller (pitcher) (Walter Miller, 1898–1975), American baseball pitcher
Other Walter Miller (philologist) (1864–1949), American classical linguistics scholar Walter B. Miller (1920–2004), American anthropologist Walter James Miller (1918–2010), American literary critic, playwright, poet, and translator Walter L. Miller (endocrinologist), American endocrinologist and professor of pediatrics Walter Lee Miller Jr., United States Marine Corps officer Walter M. Miller Jr. (1923–1996), American science fiction author Walter R. Miller (1872–1952), British missionary
See also Walter Millar (fl. 1980s–2010s), unionist politician in Northern Ireland