Athletics at the 2023 SEA Games – Mixed 4 × 400 m relay

The mixed 4 × 400 m relay competition at the 2023 SEA Games in Cambodia took place on 8 May 2023, at the Morodok Techo National Stadium in Phnom Penh.

Four teams of four athletes each took part of the competition.

Records
Prior to this competition, the existing Asian and SEA Games records were as follows: