The U.S. Census Bureau counts the number of Americans every ten years. The same government agency also asks a lot of questions of those people, such as how many bathrooms are in their house and whether or not the family owns a computer. The Census Bureau even counts how many people have the same first or last names.
There were 6.3 million surnames documented in the 2010 census. The 15 most common surnames in America were:
The most rapidly increasing surnames among the top 1,000 in both 2000 and 2010 are mostly Asian: Zhang (up 111 percent), Li (93 percent), Ali (66 percent), Liu (64 percent) and Khan (63 percent) top the list.
You can find the 1,000 most popular surnames at: https://www2.census.gov/topics/genealogy/2010surnames/Names_2010Census_Top1000.xlsx.
My own surname didn’t even make the list of the 1,000 most popular surnames!