2000
#12,721
National surname rank
Recorded bearers 2,229
First available Census row
Per 100,000 0.83
Rare Last name
Iorio
An Italian occupational surname referring to a farmer or one who tends vegetable gardens.
According to the 2020 US Census Bureau surname tables, roughly 2,440 Americans carry the last name Iorio. That puts it at #13,630 in the national surname ranking, appearing at a frequency of 0.71 per 100,000 people (about 1 in 140,473 residents).
This page is the full Name Census profile for the Iorio 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
2.4K
1 in 140,473
Census rank
#13,630
2020 decennial data
Per 100,000
0.7
Frequency rate
Recorded bearers
2.1K
rare in the US
Popularity narrative
The Census Bureau recorded 2,128 bearers of the surname Iorio in its 2020 decennial surname file. At a rate of 0.71 per 100,000 residents, it holds the 13630th position in the national surname ranking.
Among Census respondents with the surname Iorio, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.7%) and Two or More Races (1.5%).
Origin
Meaning and origin of Iorio
The surname IORIO originated in Italy, with its earliest known roots tracing back to the 12th century in the region of Campania. The name is derived from the Latin word "Horius," meaning "gardener" or "keeper of the garden." This suggests that the original bearers of the surname were likely involved in agricultural or horticultural professions.
The earliest recorded instances of the name can be found in historical documents from the city of Naples and its surrounding areas. In the 13th century, a nobleman named Guglielmo Iorio was mentioned in a manuscript detailing the ownership of land and properties within the Kingdom of Naples.
During the Renaissance period, the Iorio family gained prominence in the city of Salerno, where they were involved in various industries and trades. One notable figure from this time was Girolamo Iorio, a wealthy merchant and banker who lived from 1520 to 1585.
In the 17th century, the Iorio name appeared in the records of the Catholic Church, with several priests and clergy members bearing the surname. One such individual was Monsignor Domenico Iorio, who served as the Bishop of Avellino from 1642 to 1666.
As the Iorio family spread throughout Italy, they established roots in different regions, including Puglia, Calabria, and Sicily. In the 19th century, a famous architect named Gaetano Iorio was born in Palermo, Sicily. He designed many notable buildings in the city, including the Church of San Giuseppe dei Teatini, which was completed in 1872.
Another notable figure was Vincenzo Iorio, a military officer and politician from Naples who lived from 1835 to 1910. He served as a general in the Italian army and was later elected as a member of the Italian Parliament, representing his hometown.
Over the centuries, the Iorio surname has also been associated with various place names and locations within Italy. For example, there is a small town called Iorio in the province of Pavia, which may have derived its name from the surname or vice versa.
Demographics
Ancestry and ethnicity for Iorio
Among Census respondents with the surname Iorio, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.7%) and Two or More Races (1.5%).
The bar chart below shows how Iorio 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 Iorio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.2% · 1,941
- Hispanic or Latino5.7% · 122
- Two or more races1.5% · 32
- Asian and Pacific Islander1.0% · 22
- Black or African American0.4% · 8
- American Indian and Alaska Native0.1% · 3
Timeline
Historical Census data for Iorio
Iorio 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
#13,944
National surname rank
Recorded bearers 2,165
-64 bearers (-2.9%)
Per 100,000 0.73
Rank movement Down 1,223 places
2020
#13,630
National surname rank
Recorded bearers 2,128
-37 bearers (-1.7%)
Per 100,000 0.71
Rank movement Up 314 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #12,721 | 2,229 | 0.83 | First available Census row | First available Census row |
| 2010 | #13,944 | 2,165 | 0.73 | -64 bearers (-2.9%) | Down 1,223 places |
| 2020 | #13,630 | 2,128 | 0.71 | -37 bearers (-1.7%) | Up 314 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 Iorio 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 | #13,944 | #13,630 | 2.3% |
| Count | 2,165 | 2,128 | -1.7% |
| Per 100K | 0.73 | 0.71 | -2.5% |
Between the 2010 and 2020 Census, the number of Iorio bearers went from 2,165 to 2,128 (-1.7% change). The surname moved up 314 positions in the national ranking, going from #13,944 to #13,630.
FAQ
Iorio surname: questions and answers
How many people in the U.S. have the surname Iorio?
Name Census estimates that about 2,440 living Americans carry the surname Iorio. Using the current population baseline, that works out to roughly 1 in 140,473 residents.
How common is Iorio?
Iorio ranks #13,630 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.71 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 2,128 people with the surname Iorio. That is different from the site's living-bearer estimate (2,440), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.71 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.71 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 Iorio.
Has Iorio become more or less common over time?
Between 2010 and 2020, the surname Iorio went from 2,165 recorded bearers to 2,128. That is a decrease of 37 (-1.7%). In the national ranking it rose from #13,944 to #13,630.
What does the Census say about the background of Iorio?
Among Census respondents with the surname Iorio, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.7%) and Two or More Races (1.5%). 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 Iorio in the 2020 Census, accounting for 91.2% (1,941 people in the source table).
What is the full ancestry breakdown?
Iorio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.2%), Hispanic (5.7%), Two or More Races (1.5%). 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 Iorio (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 Iorio mean?
An Italian occupational surname referring to a farmer or one who tends vegetable gardens. 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 Iorio (0.71 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 share the surname Iorio?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.