2000
#14,544
National surname rank
Recorded bearers 1,879
First available Census row
Per 100,000 0.70
Rare Last name
Mastroianni
An Italian occupational surname referring to a master craftsman or builder, derived from the Italian word "maestro."
According to the 2020 US Census Bureau surname tables, roughly 2,236 Americans carry the last name Mastroianni. That puts it at #14,661 in the national surname ranking, appearing at a frequency of 0.65 per 100,000 people (about 1 in 153,289 residents).
This page is the full Name Census profile for the Mastroianni surname. You will find the Census Bureau frequency data, a multi-census history view, an ancestry and ethnicity breakdown based on self-reported demographics, the name's meaning and origin where available, and answers to the most common questions people ask about this surname.
Bearers in the US
2.2K
1 in 153,289
Census rank
#14,661
2020 decennial data
Per 100,000
0.7
Frequency rate
Recorded bearers
1.9K
rare in the US
Popularity narrative
The Census Bureau recorded 1,950 bearers of the surname Mastroianni in its 2020 decennial surname file. At a rate of 0.65 per 100,000 residents, it holds the 14661st position in the national surname ranking.
Among Census respondents with the surname Mastroianni, the largest self-reported group is White at 91.8%. The next largest groups are Hispanic (3.9%) and Two or More Races (3.0%).
Origin
Meaning and origin of Mastroianni
The surname Mastroianni is of Italian origin, derived from the occupational term "mastro," meaning "master" or "teacher," combined with the surname suffix "-ianni." This suggests that the name initially referred to someone who held a position of authority or expertise in a particular field or trade.
The name is believed to have originated in the southern regions of Italy, particularly in the regions of Campania, Calabria, and Sicily, where it was commonly found in historical records dating back to the 16th and 17th centuries.
One of the earliest recorded instances of the name can be found in a document from the town of Teggiano, in the province of Salerno, Campania, dated 1594, which mentions a certain Girolamo Mastroianni.
The name has also been linked to various place names in southern Italy, such as the town of Mastroianni in the province of Crotone, Calabria, and the hamlet of Mastroianni in the municipality of Cammarata, in the province of Agrigento, Sicily.
Among the notable individuals who have borne the surname Mastroianni throughout history, we can mention Marcello Mastroianni, the renowned Italian actor (1924-1996), who achieved international fame for his roles in films such as "La Dolce Vita" and "8½."
Another prominent figure was Giuseppe Mastroianni (1876-1962), an Italian politician and jurist who served as the President of the Constitutional Court of Italy from 1957 to 1962.
In the field of literature, we find Enzo Mastroianni (1936-2018), an Italian poet and writer known for his works exploring the themes of exile and displacement.
The name has also been associated with notable figures in the arts, such as Gaetano Mastroianni (1786-1858), an Italian painter and engraver active in Naples during the 19th century.
Additionally, Antonio Mastroianni (1881-1965), an Italian-American sculptor and artist, made significant contributions to the public art scene in New York City during the early 20th century.
Demographics
Ancestry and ethnicity for Mastroianni
Among Census respondents with the surname Mastroianni, the largest self-reported group is White at 91.8%. The next largest groups are Hispanic (3.9%) and Two or More Races (3.0%).
The bar chart below shows how Mastroianni bearers described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given surname, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown for every Census year so the breakdown stays comparable over time. When the source file also includes raw headcounts, Name Census shows those alongside the percentages in the legend.
Keep in mind that these are self-reported numbers. A person's surname does not determine their race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the Mastroianni surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.8% · 1,791
- Hispanic or Latino3.9% · 77
- Two or more races3.0% · 58
- Asian and Pacific Islander1.0% · 19
- Black or African American0.3% · 5
Timeline
Historical Census data for Mastroianni
Mastroianni appears in 3 published Census surname files: 2000, 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2010
#14,957
National surname rank
Recorded bearers 1,977
+98 bearers (+5.2%)
Per 100,000 0.67
Rank movement Down 413 places
2020
#14,661
National surname rank
Recorded bearers 1,950
-27 bearers (-1.4%)
Per 100,000 0.65
Rank movement Up 296 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #14,544 | 1,879 | 0.70 | First available Census row | First available Census row |
| 2010 | #14,957 | 1,977 | 0.67 | +98 bearers (+5.2%) | Down 413 places |
| 2020 | #14,661 | 1,950 | 0.65 | -27 bearers (-1.4%) | Up 296 places |
For 2020, the Census Bureau published race and Hispanic-origin columns as counts rather than percentages. Name Census converts those counts back into shares so the ancestry section stays comparable with the older surname files.
Year on year
2010 vs 2020 Census
How has the Mastroianni surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20102020
| Metric | 2010 | 2020 | Change |
|---|---|---|---|
| Rank | #14,957 | #14,661 | 2.0% |
| Count | 1,977 | 1,950 | -1.4% |
| Per 100K | 0.67 | 0.65 | -2.6% |
Between the 2010 and 2020 Census, the number of Mastroianni bearers went from 1,977 to 1,950 (-1.4% change). The surname moved up 296 positions in the national ranking, going from #14,957 to #14,661.
Notable bearers
Famous people with the surname Mastroianni
FAQ
Mastroianni surname: questions and answers
How many people in the U.S. have the surname Mastroianni?
Name Census estimates that about 2,236 living Americans carry the surname Mastroianni. Using the current population baseline, that works out to roughly 1 in 153,289 residents.
How common is Mastroianni?
Mastroianni ranks #14,661 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.65 per 100,000 residents, which is about 1 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 1,950 people with the surname Mastroianni. That is different from the site's living-bearer estimate (2,236), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.65 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.65 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 1 of them to have the surname Mastroianni.
Has Mastroianni become more or less common over time?
Between 2010 and 2020, the surname Mastroianni went from 1,977 recorded bearers to 1,950. That is a decrease of 27 (-1.4%). In the national ranking it rose from #14,957 to #14,661.
What does the Census say about the background of Mastroianni?
Among Census respondents with the surname Mastroianni, the largest self-reported group is White at 91.8%. The next largest groups are Hispanic (3.9%) and Two or More Races (3.0%). These figures come from the 2020 Census Bureau surname tables, based on how respondents described their own race and ethnicity.
Which group reports this surname most often?
White is the largest self-reported group for the surname Mastroianni in the 2020 Census, accounting for 91.8% (1,791 people in the source table).
What is the full ancestry breakdown?
Mastroianni appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.8%), Hispanic (3.9%), Two or More Races (3.0%). For 2020, the source file also published raw headcounts for each group, which is why this page can show both percentages and counts in the ancestry section.
Is this page using the latest Census data?
Yes. This page is using the latest surname file currently loaded on Name Census, which is 2020. The historical section above also keeps any older Census surname entries we have for Mastroianni (2000, 2010, 2020).
Does the Census include every surname?
No. The Census Bureau only publishes surnames that appeared at least 100 times in a given decennial Census. That means very rare surnames are excluded entirely, and a surname can appear in one Census release but disappear from a later one if it falls below the reporting threshold.
Why don't the ancestry percentages always add up to exactly 100%?
There are two main reasons: rounding and suppression. The Census Bureau rounds published values, and it may suppress very small cells to protect privacy. For 2020, the Bureau also published raw group counts rather than direct percentages, so Name Census converts those counts back into shares for comparability across census years.
What does Mastroianni mean?
An Italian occupational surname referring to a master craftsman or builder, derived from the Italian word "maestro." The fuller origin note on this page goes into more detail.
Where does the surname data come from?
All surname statistics on Name Census are drawn from the US Census Bureau's decennial surname frequency tables. These files list every surname that appeared 100 or more times in the 2020 Census, along with a count, a per-100,000 rate, and a self-reported demographic breakdown. You can read the full explanation on our methodology page.
How does Name Census estimate living bearers?
For surnames, Name Census does not age cohorts the way it does for first names. Instead, it takes the Census Bureau's published frequency for Mastroianni (0.65 per 100,000) and applies that rate to the current U.S. resident population to estimate how many living Americans have the surname today.
How many people are called Mastroianni?
For a quick modern take, check how many people are called Mastroianni on our sister site HowManyOfMe.org.