Dubem Nwachukwu (born 8 February 2000) is a Nigerian track and field athlete who competes over 400 metres.

[4] Nwachukwu was cleared by World Athletics to switch from the United States to Nigeria in 2023.

[6] In August 2023, he competed for Nigeria in Budapest at the 2023 World Athletics Championships.

[7] In March 2024, he was selected for the 2024 World Athletics Indoor Championships in Glasgow, where he reached the semi-final of the men's 400 meters.

[10][11] In July 2024, he was officially named as part of the Nigerian team for the 2024 Paris Olympics to compete in the relay.