The 2023 IHF Men's U21 Handball World Championship was the 24th edition of the IHF Men's U21 Handball World Championship, held in Germany and Greece under the aegis of the International Handball Federation (IHF) from 20 June to 2 July 2023.

It was the second time in history that the championship will be jointly organised by two countries, the first being in 1979.

[1] Germany won their third title after defeating Hungary in the final.

The tournament was awarded to Germany by IHF Council in its meeting held in Cairo, Egypt on 28 February 2020.

On 15 July 2021, the IHF Council unanimously approved the request from Germany and Greece to co-host the event.