How Common Is the Surname Iwamasa?
The surname Iwamasa is the #147,253 most common last name in the United States, with an estimated 134 bearers. That's about 1 in 2,506,666 Americans. This data comes from the 2010 U.S. Census Bureau surname frequency tables.
This page covers the Iwamasa surname's frequency in the U.S. population, its rank among all American surnames, and a breakdown of ancestry and ethnicity data from the Census. You can also check how many people share any first + last name combination involving Iwamasa.
Estimated Americans with this Surname
134
About 1 in 2,506,666 people in the U.S.
Census Rank
#147,253
Frequency Rate
0.04
per 100,000 people
Census Count
112
2010 Census
Data Source
2010
U.S. Census Bureau
Ancestry and Ethnicity for Iwamasa
The Iwamasa surname is most commonly associated with people who identify as Asian/Pacific Islander (91.07%). The next largest groups are Two or More Races (4.46%).
Self-reported race and ethnicity from the 2010 U.S. Census Bureau surname tables. Some categories may be suppressed for privacy when sample sizes are small.
How Many People Are Named ... Iwamasa?
Pair the Iwamasa surname with a first name to estimate how many people share that full name in the United States.
Iwamasa Surname: Questions and Answers
How common is the last name Iwamasa?
Iwamasa is the #147,253 most common surname in the United States, with an estimated 134 people sharing this last name. It appears at a rate of 0.04 per 100,000 Americans.
What ethnicity is the surname Iwamasa?
The Iwamasa surname is most commonly associated with people who identify as Asian/Pacific Islander (91.07%). The next largest groups are Two or More Races (4.46%). This data comes from the 2010 U.S. Census Bureau surname tables, which include self-reported race and ethnicity breakdowns.
How many people named [First Name] Iwamasa are there?
We can estimate any first + last name combination. Popular examples: Michael Iwamasa, James Iwamasa, John Iwamasa. Search any combination on our homepage.
Where does this surname data come from?
Surname frequency data comes from the 2010 U.S. Census Bureau decennial surname tables. These list every surname appearing in the Census along with frequency rates and demographic breakdowns. Full methodology.
Search for a full name combination
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