Frank Arnold
Frank Arnold may refer to:
- Frank Arnold (basketball), American basketball coach
- Frank Arnold (director), Australian television director
- Frank Arnold (footballer), Australian rules footballer
- Frank Arnold (umpire), American baseball umpire
- Frank B. Arnold, New York politician
- Frank D. Arnold, United States Ambassador to El Salvador
- Frank W. Arnold, American trade union functionary
- Frank Arnold (architect), American architect with many works in Forest Park Southeast Historic District of St. Louis, Missouri