2010
#134,712
National surname rank
Recorded bearers 125
First available Census row
Per 100,000 0.04
Very Rare Last name
Ollero
A Spanish surname derived from the occupation of an oil merchant or producer.
According to the 2020 US Census Bureau surname tables, roughly 135 Americans carry the last name Ollero. That puts it at #143,511 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,538,921 residents).
This page is the full Name Census profile for the Ollero 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
135
1 in 2,538,921
Census rank
#143,511
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
118
very rare in the US
Popularity narrative
The Census Bureau recorded 118 bearers of the surname Ollero in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 143511th position in the national surname ranking.
Among Census respondents with the surname Ollero, the largest self-reported group is Asian/Pacific Islander at 53.4%. The next largest groups are Hispanic (19.5%) and White (16.9%).
Origin
Meaning and origin of Ollero
The surname Ollero is of Spanish origin, with its roots dating back to the Middle Ages in the Iberian Peninsula. It is believed to be derived from the Spanish word "ollero," which translates to "potter" or "maker of earthenware vessels." This suggests that the name was likely associated with a family or group of individuals involved in the pottery trade or craft during that time period.
The earliest recorded instances of the Ollero surname can be found in various historical documents and records from the 13th and 14th centuries. One notable example is the mention of a certain Juan Ollero in a land registry document from the city of Seville, dated around 1280. This indicates that individuals bearing this surname were already present in parts of southern Spain during the late medieval era.
As the name spread across different regions of Spain, variations in spelling and pronunciation emerged. Some examples of these variations include Olleiro, Oleiro, and Oleyro, reflecting the linguistic diversity and regional dialects within the country. These variations often corresponded to the areas where the name was most prevalent, such as Galicia, Asturias, and Castile.
Throughout history, several notable individuals have carried the Ollero surname. One such figure was Diego Ollero, a Spanish painter and artist active in the 16th century, renowned for his religious works and contributions to the Renaissance art movement in Spain. Another individual of note was Pedro Ollero, a 17th-century Spanish author and poet whose works explored themes of love, nature, and spirituality.
In the realm of literature, the name Ollero appears in several historical manuscripts and chronicles. For instance, a 14th-century manuscript from the Kingdom of Aragon mentions a certain Ferran Ollero, who is believed to have been a landowner or nobleman of that era. Additionally, the Ollero name is referenced in various legal documents and property records from the 15th and 16th centuries, further solidifying its historical presence in Spain.
Other notable individuals bearing the Ollero surname include María Ollero, a Spanish educator and advocate for women's rights in the early 20th century, and Juan Ollero, a renowned Spanish architect and urban planner who contributed to the design and development of several major cities in Spain during the mid-20th century.
Demographics
Ancestry and ethnicity for Ollero
Among Census respondents with the surname Ollero, the largest self-reported group is Asian/Pacific Islander at 53.4%. The next largest groups are Hispanic (19.5%) and White (16.9%).
The bar chart below shows how Ollero 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 Ollero surname at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander53.4% · 63
- Hispanic or Latino19.5% · 23
- White16.9% · 20
- Two or more races10.2% · 12
Timeline
Historical Census data for Ollero
Ollero appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#143,511
National surname rank
Recorded bearers 118
-7 bearers (-5.6%)
Per 100,000 0.04
Rank movement Down 8,799 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #134,712 | 125 | 0.04 | First available Census row | First available Census row |
| 2020 | #143,511 | 118 | 0.04 | -7 bearers (-5.6%) | Down 8,799 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 Ollero 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 | #134,712 | #143,511 | -6.5% |
| Count | 125 | 118 | -5.6% |
| Per 100K | 0.04 | 0.04 | -1.3% |
Between the 2010 and 2020 Census, the number of Ollero bearers went from 125 to 118 (-5.6% change). The surname moved down 8,799 positions in the national ranking, going from #134,712 to #143,511.
FAQ
Ollero surname: questions and answers
How many people in the U.S. have the surname Ollero?
Name Census estimates that about 135 living Americans carry the surname Ollero. Using the current population baseline, that works out to roughly 1 in 2,538,921 residents.
How common is Ollero?
Ollero ranks #143,511 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 per 100,000 residents, which is about 0 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 118 people with the surname Ollero. That is different from the site's living-bearer estimate (135), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 0 of them to have the surname Ollero.
Has Ollero become more or less common over time?
Between 2010 and 2020, the surname Ollero went from 125 recorded bearers to 118. That is a decrease of 7 (-5.6%). In the national ranking it fell from #134,712 to #143,511.
What does the Census say about the background of Ollero?
Among Census respondents with the surname Ollero, the largest self-reported group is Asian/Pacific Islander at 53.4%. The next largest groups are Hispanic (19.5%) and White (16.9%). 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?
Asian/Pacific Islander is the largest self-reported group for the surname Ollero in the 2020 Census, accounting for 53.4% (63 people in the source table).
What is the full ancestry breakdown?
Ollero appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Asian/Pacific Islander (53.4%), Hispanic (19.5%), White (16.9%). 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 Ollero (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 Ollero mean?
A Spanish surname derived from the occupation of an oil merchant or producer. 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 Ollero (0.04 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 Ollero?
Find out how common the surname Ollero is on our sister site HowManyOfMe.org — a quick modern estimate with the living-bearer count front and centre.