World Most popular surnames by U.S. State April 13, 2017 Alex Smith is the most common last name in the U.S. Reddit user: nodougbutdoug Related Posts:The Most Common Last Name In Every CountryHow Each State got its NameEvery Country’s Favorite Children’s Toy, from Dolls…Map of common US surnamesMost common surnames in the Italian RegionsMap showing countries which since independence have…The most common surname in each UK provinceThe Most Popular Consumer Brands in the World and…