How long did it take for the Spaniards to leave Mexico?

Answer 1

If you mean how long it took for Mexico to win its independence war, the conflict took 11 years of duration (1810 - 1821). If you mean if Spaniards ever leaved Mexico, most of them stayed, becoming part of the criollo population that survives up to this day -- Mexico has a 9-17% of its population of white European descent; also 60-80% of Mexicans are descendants of interracial marriages between Spanish and Native Americans.

Answer 2

From the arrival of Cortes in Yucatan to his successful second attempt was a period of about 2 1/2 years (30 months), from February 1519 to August 1521.