Harlow received numerous awards and honors, including the Howard Crosby Warren Medal (1956), the National Medal of Science (1967), and the Gold Medal from the American Psychological Foundation (1973).
Harlow pälvis mitmeid autasusid, sealhulgas Howard Crosby Warreni medali (1956), rahvusliku teaduse medali (1967) ja kuldmedali Ameerika Psühholoogide Ühingult aastal 1973.