Explore the Family Name De Mario

The meaning of De Mario

Italian: variant of Di Mario. Some characteristic forenames: Italian Rocco, Angelo, Carina, Giuseppe, Nino, Vito.

Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.

How common is the last name De Mario in the United States?

Based on the Decennial U.S. Census data, the surname De Mario saw a decrease in popularity between 2000 and 2010. In the year 2000, it was ranked 28,947th in popularity, but by 2010, it had slipped to 33,731st, representing a change of -16.53%. During the same period, the count of people with this surname also dropped from 773 to 675, which is a decrease of -12.68%. The proportion of people with the surname De Mario per 100,000 population decreased by -20.69%.

20002010Change
Rank#28,947#33,731-16.53%
Count773675-12.68%
Proportion per 100k0.290.23-20.69%

Race and Ethnicity of people with the last name De Mario

In regard to ethnicity, the Decennial U.S. Census data reveals that the majority of individuals with the surname De Mario identify as White, although this percentage decreased slightly from 92.76% in 2000 to 90.67% in 2010. There were no people identifying as Asian/Pacific Islander or American Indian and Alaskan Native in either year. However, there were small increases in other ethnic identities over the decade. The percentage of De Marios identifying as Black increased by 10.50%, from 3.62% in 2000 to 4% in 2010. Those identifying as Hispanic increased by 52.90%, from 1.55% to 2.37%. Finally, those identifying with two or more races saw the most significant increase, from 1.03% in 2000 to 1.63% in 2010, marking an impressive 58.25% rise.

20002010Change
White92.76%90.67%-2.25%
Black3.62%4%10.5%
Hispanic1.55%2.37%52.9%
Two or More Races1.03%1.63%58.25%
Asian/Pacific Islander0%0%0%
American Indian and Alaskan Native0%0%0%