The men's 1964 United States Olympic trials for track and field were a two-tiered event.
Athletes first met for semi-final Olympic trials at Downing Stadium in Randalls Island, New York, from July 3 to 4.
The races at Los Angeles were only the finals, selected from the top runners in the semi-final Olympic trials in New York.
Two marathon trials were held, the AAU National Championships in Yonkers, New York, on May 24 selected one entrant, while the Western Hemisphere Marathon in Culver City, California, on July 26 selected two.
The women's Olympic trials were held separately in Downing Stadium on Randalls Island, New York, between August 6 and 8.