See common surnames with our common surname generator. All the surnames are based on United Status census data and include the most common surnames in the US. The generator only displays names from the top 1000 most common surnames. The surnames are displayed randomly. So the first name you see will not be the most common surname in the country, unless you happen to get lucky. If you don't know already, the most common surname in the United States is Smith. The generator is helpful for naming characters in books that you may be writing. Enjoy finding common surnames with our common surname generator.