Arnold Johnson may refer to:Arnold Johnson (activist) (1904–1989), American communist activist Arnold Johnson (actor) (1921–2000), American actor Arnold Johnson (industrialist) (1906–1960), American industrialist, businessman and owner of the Kansas City Athletics baseball club Arnold Johnson (musician) (1893–1975), American big band pianist, arranger, composer and leader Arnold Johnson (physician) (1916–2006), Canadian cardiologist

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