This was the 29th appearance of the event, which is one of 12 athletics events to have been held at every Summer Olympics. Five of the top 10 runners from Rio 2016 returned: gold medalist Eliud Kipchoge of Kenya, bronze medalist Galen Rupp of the United States, fifth-place finisher Alphonce Simbu of Tanzania, seventh-place finisher Tadesse Abraham of Switzerland, and ninth-place finisher Callum Hawkins of Great Britain.
