The 2019 IAAF World Relays was held in Yokohama, Japan from May 11 to May 12, 2019. Two new events were established for 2019, both mixed events: the relay and the shuttle hurdles relay. The first event replaced the relay that featured at previous events.
Teams scored for every place in the top 8 with 8 points awarded for first place, 7 for second, etc. The overall points winner was given the Golden Baton.
43 nations took part in the competition.