2000
#8,151
National surname rank
Recorded bearers 3,746
First available Census row
Per 100,000 1.39
Rare Last name
Gregorio
Derived from the Latin name Gregorius, meaning "watchful, alert, or vigilant," referring to a person with those qualities.
According to the 2020 US Census Bureau surname tables, roughly 6,064 Americans carry the last name Gregorio. That puts it at #6,202 in the national surname ranking, appearing at a frequency of 1.77 per 100,000 people (about 1 in 56,523 residents).
This page is the full Name Census profile for the Gregorio 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
6.1K
1 in 56,523
Census rank
#6,202
2020 decennial data
Per 100,000
1.8
Frequency rate
Recorded bearers
5.3K
rare in the US
Popularity narrative
The Census Bureau recorded 5,288 bearers of the surname Gregorio in its 2020 decennial surname file. At a rate of 1.77 per 100,000 residents, it holds the 6202nd position in the national surname ranking.
Among Census respondents with the surname Gregorio, the largest self-reported group is Hispanic at 42.3%. The next largest groups are White (32.7%) and Asian/Pacific Islander (21.0%).
Origin
Meaning and origin of Gregorio
The surname Gregorio has its origins in the Italian language and can be traced back to the early medieval period in Italy. The name is derived from the Latin name "Gregorius," which means "watchful" or "vigilant." This name was popularized by several early Popes who bore the name Gregory, including Gregory the Great, who reigned from 590 to 604 AD.
One of the earliest recorded instances of the surname Gregorio can be found in the Codex Diplomaticus Cavensis, a collection of medieval documents from the Abbey of Cava in southern Italy, dating back to the 11th century. The surname is also mentioned in various other historical records from different regions of Italy, such as the Codice Diplomatico Longobardo, which contains documents from the Lombard period in northern Italy.
The surname Gregorio is believed to have originated in various regions of Italy, including Campania, Lazio, and Tuscany. It is closely associated with several place names, such as Gregoriopoli, a town in Calabria, and Gregorio, a hamlet in the province of Palermo, Sicily.
Some notable individuals who bore the surname Gregorio throughout history include:
1. Giovanni Gregorio (1552-1633), an Italian humanist scholar and historian from Naples.
2. Federico Gregorio (1561-1634), an Italian jurist and diplomat from Naples.
3. Gaspare Gregorio (1615-1687), an Italian historian and antiquarian from Messina, Sicily.
4. Pietro Gregorio (1663-1735), an Italian painter and engraver from Naples.
5. Ferdinando Gregorio (1758-1827), an Italian jurist and politician from Palermo, Sicily.
While the surname Gregorio has its roots in Italy, it has also been adopted by individuals in other parts of the world, particularly in Spanish-speaking countries, where it is often spelled as "Gregorio" or "Gregorio." However, the historical references and notable individuals mentioned above primarily pertain to the Italian origin and usage of the surname.
Demographics
Ancestry and ethnicity for Gregorio
Among Census respondents with the surname Gregorio, the largest self-reported group is Hispanic at 42.3%. The next largest groups are White (32.7%) and Asian/Pacific Islander (21.0%).
The bar chart below shows how Gregorio 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 Gregorio surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino42.3% · 2,237
- White32.7% · 1,729
- Asian and Pacific Islander21.0% · 1,113
- Two or more races2.3% · 121
- Black or African American1.0% · 55
- American Indian and Alaska Native0.6% · 33
Timeline
Historical Census data for Gregorio
Gregorio 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
#6,494
National surname rank
Recorded bearers 5,228
+1,482 bearers (+39.6%)
Per 100,000 1.77
Rank movement Up 1,657 places
2020
#6,202
National surname rank
Recorded bearers 5,288
+60 bearers (+1.1%)
Per 100,000 1.77
Rank movement Up 292 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #8,151 | 3,746 | 1.39 | First available Census row | First available Census row |
| 2010 | #6,494 | 5,228 | 1.77 | +1,482 bearers (+39.6%) | Up 1,657 places |
| 2020 | #6,202 | 5,288 | 1.77 | +60 bearers (+1.1%) | Up 292 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 Gregorio 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 | #6,494 | #6,202 | 4.5% |
| Count | 5,228 | 5,288 | 1.1% |
| Per 100K | 1.77 | 1.77 | -0.0% |
Between the 2010 and 2020 Census, the number of Gregorio bearers went from 5,228 to 5,288 (+1.1% change). The surname moved up 292 positions in the national ranking, going from #6,494 to #6,202.
FAQ
Gregorio surname: questions and answers
How many people in the U.S. have the surname Gregorio?
Name Census estimates that about 6,064 living Americans carry the surname Gregorio. Using the current population baseline, that works out to roughly 1 in 56,523 residents.
How common is Gregorio?
Gregorio ranks #6,202 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 1.77 per 100,000 residents, which is about 2 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 5,288 people with the surname Gregorio. That is different from the site's living-bearer estimate (6,064), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 1.77 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 1.77 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 2 of them to have the surname Gregorio.
Has Gregorio become more or less common over time?
Between 2010 and 2020, the surname Gregorio went from 5,228 recorded bearers to 5,288. That is an increase of 60 (+1.1%). In the national ranking it rose from #6,494 to #6,202.
What does the Census say about the background of Gregorio?
Among Census respondents with the surname Gregorio, the largest self-reported group is Hispanic at 42.3%. The next largest groups are White (32.7%) and Asian/Pacific Islander (21.0%). 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?
Hispanic is the largest self-reported group for the surname Gregorio in the 2020 Census, accounting for 42.3% (2,237 people in the source table).
What is the full ancestry breakdown?
Gregorio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (42.3%), White (32.7%), Asian/Pacific Islander (21.0%). 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 Gregorio (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 Gregorio mean?
Derived from the Latin name Gregorius, meaning "watchful, alert, or vigilant," referring to a person with those qualities. 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 Gregorio (1.77 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 Gregorio?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.