Jack Russell may refer to:

• Jack Russell Terrier, a type of dog

• Jack Russell (American football) (1919–2006), American football end
• Jack Russell (baseball) (1905–1990), American baseball player
• Jack Russell (cricketer, born 1963) (born 1963), English cricketer and artist
• Jack Russell (cricketer, born 1887) (1887–1961), English cricketer
• Jack Russell (footballer) (1904–1995), English footballer in the 1920s and 1930s
• Jack Russell (Cork hurler) (born 1945), Irish hurler and coach
• Jack Russell (Wexford hurler) (born 1950), Irish hurler
• Jack Russell (musician) (1960–2024), American lead singer for the band Great White
• Jack Russell (priest) (1795–1883), English dog breeder and hunter
• Jack Russell (rower) (born 1930), Canadian who competed in rowing at the 1952 Summer Olympics
• Jack Russell, 25th Baron de Clifford (1884–1909), British army officer and nobleman

• Jack Russell, one of the alter egos of Werewolf by Night in Marvel Comics
• Jack Russell, a friend of Rusty in Bluey

• Jack Russell Memorial Stadium, a stadium in Clearwater, Florida
• John Russell (disambiguation)