2000
#6,546
National surname rank
Recorded bearers 4,776
First available Census row
Per 100,000 1.77
Rare Last name
Aguero
A Spanish surname referring to someone who lived near or worked with water, such as a water carrier.
According to the 2020 US Census Bureau surname tables, roughly 7,453 Americans carry the last name Aguero. That puts it at #5,191 in the national surname ranking, appearing at a frequency of 2.17 per 100,000 people (about 1 in 45,989 residents).
This page is the full Name Census profile for the Aguero 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
7.5K
1 in 45,989
Census rank
#5,191
2020 decennial data
Per 100,000
2.2
Frequency rate
Recorded bearers
6.5K
rare in the US
Popularity narrative
The Census Bureau recorded 6,499 bearers of the surname Aguero in its 2020 decennial surname file. At a rate of 2.17 per 100,000 residents, it holds the 5191st position in the national surname ranking.
Among Census respondents with the surname Aguero, the largest self-reported group is Hispanic at 89.6%. The next largest groups are White (7.2%) and Asian/Pacific Islander (1.6%).
Origin
Meaning and origin of Aguero
The surname Aguero originates from Spain and Portugal, making its first appearance in the 12th century. It is a habitational name derived from the Spanish word "agüero," meaning "omen" or "augury," which in turn comes from the Latin word "augurium." This suggests that the name may have been given to someone who lived near a place associated with divination or omens.
One of the earliest recorded instances of the name is found in the 13th-century Catalan manuscript "Llibre del Repartiment de València," which documented the distribution of land and property in the newly conquered Kingdom of Valencia. The name appears as "Agüero," indicating its historical spelling variations.
In the 14th century, the name Aguero is mentioned in the "Libro de la Behetría," an important document that recorded the privileges and obligations of various towns and villages in the Kingdom of Castile. This suggests that the name was present in that region during that period.
One notable figure with the surname Aguero was Pedro de Aguero, a Spanish conquistador who participated in the conquest of Peru in the 16th century. He was born in Seville, Spain, around 1495 and played a significant role in the expeditions led by Francisco Pizarro and Diego de Almagro.
Another individual of note was Juan Bautista Aguero, a Spanish painter who lived from 1725 to 1788. He was known for his religious paintings and worked extensively in the cathedrals and churches of Córdoba, Spain.
In the 19th century, Francisco de Aguero y Velasco (1781-1842) was a prominent Spanish politician and writer. He served as a member of the Cortes (the Spanish parliament) and was a vocal advocate for liberal reforms.
Jumping to the 20th century, Sergio Aguero (born 1988) is a renowned Argentine professional footballer who has played for various clubs, including Manchester City and Atlético Madrid. He is widely regarded as one of the best strikers of his generation.
Lastly, María Aguero (1889-1974) was a Cuban writer and activist known for her contributions to the feminist movement in Cuba. She was a pioneer in advocating for women's rights and published several books and articles on the subject.
Demographics
Ancestry and ethnicity for Aguero
Among Census respondents with the surname Aguero, the largest self-reported group is Hispanic at 89.6%. The next largest groups are White (7.2%) and Asian/Pacific Islander (1.6%).
The bar chart below shows how Aguero 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 Aguero surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino89.6% · 5,823
- White7.2% · 468
- Asian and Pacific Islander1.6% · 107
- American Indian and Alaska Native0.9% · 61
- Two or more races0.4% · 26
- Black or African American0.2% · 14
Timeline
Historical Census data for Aguero
Aguero 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
#5,437
National surname rank
Recorded bearers 6,402
+1,626 bearers (+34.0%)
Per 100,000 2.17
Rank movement Up 1,109 places
2020
#5,191
National surname rank
Recorded bearers 6,499
+97 bearers (+1.5%)
Per 100,000 2.17
Rank movement Up 246 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #6,546 | 4,776 | 1.77 | First available Census row | First available Census row |
| 2010 | #5,437 | 6,402 | 2.17 | +1,626 bearers (+34.0%) | Up 1,109 places |
| 2020 | #5,191 | 6,499 | 2.17 | +97 bearers (+1.5%) | Up 246 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 Aguero 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 | #5,437 | #5,191 | 4.5% |
| Count | 6,402 | 6,499 | 1.5% |
| Per 100K | 2.17 | 2.17 | 0.2% |
Between the 2010 and 2020 Census, the number of Aguero bearers went from 6,402 to 6,499 (+1.5% change). The surname moved up 246 positions in the national ranking, going from #5,437 to #5,191.
FAQ
Aguero surname: questions and answers
How many people in the U.S. have the surname Aguero?
Name Census estimates that about 7,453 living Americans carry the surname Aguero. Using the current population baseline, that works out to roughly 1 in 45,989 residents.
How common is Aguero?
Aguero ranks #5,191 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 2.17 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 6,499 people with the surname Aguero. That is different from the site's living-bearer estimate (7,453), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 2.17 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 2.17 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 Aguero.
Has Aguero become more or less common over time?
Between 2010 and 2020, the surname Aguero went from 6,402 recorded bearers to 6,499. That is an increase of 97 (+1.5%). In the national ranking it rose from #5,437 to #5,191.
What does the Census say about the background of Aguero?
Among Census respondents with the surname Aguero, the largest self-reported group is Hispanic at 89.6%. The next largest groups are White (7.2%) and Asian/Pacific Islander (1.6%). 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 Aguero in the 2020 Census, accounting for 89.6% (5,823 people in the source table).
What is the full ancestry breakdown?
Aguero appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (89.6%), White (7.2%), Asian/Pacific Islander (1.6%). 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 Aguero (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 Aguero mean?
A Spanish surname referring to someone who lived near or worked with water, such as a water carrier. 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 Aguero (2.17 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 have the last name Aguero?
You can see how many Americans have the surname Aguero on our sister site HowManyOfMe.org — same data roots, lighter UI.