2019 IAAF World Relays
| Host city | Yokohama, Japan | 
|---|---|
| Events | 9 | 
| Dates | 11–12 May | 
| Main venue | Yokohama International Stadium | 
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 2 × 2 × 400 m relay and the shuttle hurdles relay. The first event replaced the 4 × 800 m relay that featured at previous events.