Is Blanco a Mexican last name?

Yes, Blanco is a Mexican last name and is quite common in Mexico, though it is originally of Spanish origin. Blanco is a Spanish surname meaning white in Spanish, and was brought to Mexico by Spanish colonists during the colonial period starting in the 16th century. As a surname, Blanco was originally given as a nickname for someone with white hair, pale skin, very light clothing, or who lived in a white house. Today, Blanco is found throughout the Spanish-speaking world including Spain, Mexico, Argentina, and the United States. In Mexico, Blanco is moderately common, ranking among the top few hundred surnames, with many families named Blanco in states like Jalisco, Veracruz, and Mexico City. Famous Mexicans with the surname include Cuauhtémoc Blanco, the famous soccer player and former governor of Morelos, and many other athletes, politicians, and artists. While Blanco is used in Mexico, it is not exclusively Mexican, it is a pan-Hispanic surname also common in Spain, Puerto Rico, Cuba, and Argentina. In the US, many Mexican-Americans have the surname Blanco. So yes, Blanco is a Mexican last name in the sense that many Mexicans have it and it is common in Mexico, but its linguistic origin is Spanish from Spain, and it is used throughout the Hispanic world, not just Mexico.