James, Jim, or Jimmy Mills may refer to:
Arts and entertainment
James Mills (author) (1932-2011), American novelist, screenwriter and journalist
Jim Mills (banjo player) (1966–2024), American bluegrass banjo player
James Edward Mills, African American author
Law and politics
James Mills (ship owner) (1847–1936), New Zealand businessman and politician
James Mills (Manitoba politician) (1914–1997), Canadian politician
James R. Mills (1927–2021), American politician in California
Science and medicine
James Philip Mills (1890–1960), English ethnographer
James L. Mills (born 1947), American epidemiologist
James O. Mills, American Egyptologist
Sports
Jimmy Mills (1894–1990), Scottish-American soccer player
James P. Mills (1909–1987), American polo player
Jim Mills (rugby) (born 1944), Welsh rugby union and rugby league footballer
Jim Mills (gridiron football) (born 1961), Canadian-American football player
Others
James Henry Mills (1923–1973), American Medal of Honor recipient