Note 1: In 1888 both the NAAAA and the AAU held championships
120 yd hurdles 1876–1927, 1929–31, 1953–55, 1957–58, 1961–63, 1965–67 and 1969–71; 110 m hurdles otherwise.
First place was shared in 1969 and 1977.
The 1920, 1928, 1932, 1992, 1996, 2000, 2004, 2008, 2012 and 2016 championships incorporated the Olympic Trials, otherwise held as a discrete event.
2020 OT: The 2020 Olympic Trials were delayed and held in 2021 due to the COVID-19 pandemic.
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