Billy Arnold may refer to:
Billy Arnold (baseball) (1851–1899), American baseball player Billy Arnold (basketball) (born 1940s), American college basketball player Billy Arnold (boxer) (1926–1995), American boxer Billy Arnold (racing driver) (1905–1976), American racing driver Billy Boy Arnold (born 1935), American blues harmonica player, singer and songwriter
See also Bill Arnold (disambiguation) William Arnold (disambiguation)