Since his debut in 2019, Olmo has played 46 games for Spain and scored 12 goals. He is only three players in the team.

In the European group stage of the World Cup preliminaries, Spain and Türkiye played against each other. In this game, Barcelona midfielder Olmo opened the scoring for the Matador Legion.

Since his debut for Spain in November 2019, Olmo has played 46 games for the national team in all competitions and scored 12 goals. The team is second only to Ferran Torres (23 goals), Morata (21 goals) and Oyarzabal (20 goals).