The 2021 NACAC U23 Championships in Athletics was the 11th edition of the biennial NACAC U23 athletics championships. They were held in San José, Costa Rica from 9 July to 11 July. For the first time an U20 competition was held next to the U23 and U18 categories.
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263 athletes (158 men and 105 women) from 19 nations participated in these championships.