Smith, Johnson, Miller, Jones, Williams, and Anderson are the most popular surnames in the US No surprise, but there some regional differences across the country, as seen in this map:
Virginia and Maryland have the same top three names, Smith, Johnson and James. In California and New Mexico the top three names are Hispanic and two out of top three names in Texas also Hispanic. Williams is among the top three names in almost all southern states. Brown is a popular surname in the northeast. Only in Massachusetts is the name Sullivan in the top three thanks to their large Irish population. Smith is the dominant name across the country, including Alaska.
My surname, Martin, may not be number one in the US but it is in France: