Which country has the largest Spanish speaking population?

The “top 5” 2022 data from the statistica website is also useful: Characteristic Number of speakers in millions Mexico 127.03 Colombia 51.74 Argentina 45.77 Spain 43.52 United States 41.25

thought Spain might top that list

Well, you made that one easy.

The US is bigger but only 13% speak Spanish. Portugal has a small population and only 10% speak Spanish. Kenya has no significant Spanish speaking population.