Frederick, Frederic, Friedrich or Fred Walker may refer to:

• Frederick Walker (native police commandant) (died 1866), explorer
• Frederick Walker (painter) (1840–1875), English painter and illustrator
• Frederic John Walker (1896–1944), British naval officer
• Frederic Walker (cricketer) (1829–1889), English cricketer
• Fred Walker (entrepreneur) (1884–1935), Australian businessman, original producer of Vegemite
• Mysterious Walker (Frederick Mitchell Walker, 1884–1958), American baseball pitcher and college baseball coach
• Dixie Walker (Fred E. Walker, 1910–1982), American professional baseball outfielder
• Fred Walker (footballer, born 1878) (1878–1940), English footballer for Leeds and Huddersfield
• Fred Walker (footballer, born 1913) (1913–1978), English footballer for Sheffield Wednesday
• Fred L. Walker (1887–1969), U.S. Army general in WW2, commander of the 36th Infantry Division
• Frederick James Walker (1876–1914), Irish motorcycle racer
• Frederick William Walker (1830–1910), English headmaster
• Freddy Walker (born 1994), New Zealand cricketer

• Frederick Forestier-Walker (1844–1910), British Army officer