2010
#141,140
National surname rank
Recorded bearers 118
First available Census row
Per 100,000 0.04
Very Rare Last name
Quilo
A surname derived from the Spanish word for a weight unit, possibly referring to an occupation related to weighing or measurement.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Quilo. That puts it at #141,309 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,465,859 residents).
This page is the full Name Census profile for the Quilo 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
139
1 in 2,465,859
Census rank
#141,309
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
121
very rare in the US
Popularity narrative
The Census Bureau recorded 121 bearers of the surname Quilo in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 141309th position in the national surname ranking.
Among Census respondents with the surname Quilo, the largest self-reported group is Hispanic at 85.1%. The next largest groups are Asian/Pacific Islander (13.2%) and White (0.8%).
Origin
Meaning and origin of Quilo
The surname Quilo originates from Spain and can be traced back to the 13th century. It is believed to have derived from the Latin word "quilus," meaning "someone from Quilo," a small town in the region of Castile-La Mancha. The name was likely adopted by individuals who migrated from this area.
One of the earliest recorded instances of the surname Quilo can be found in a land registry document from the town of Almagro, dated 1287. This document mentions a certain Pedro Quilo, who owned a modest plot of farmland in the area.
During the 15th century, the name Quilo appeared in several church records from the city of Toledo. These records indicate that a family with this surname had established a presence in the city, possibly due to the economic opportunities offered by the thriving wool trade.
In the 16th century, a notable figure named Juan Quilo (1512-1588) gained recognition as a skilled architect. He was responsible for the design and construction of several churches and public buildings in the city of Seville.
The name Quilo also found its way into the literary world in the 17th century. Miguel Quilo (1623-1701), a poet and playwright from Madrid, gained acclaim for his works, which were widely published and performed during his lifetime.
During the 18th century, a wealthy merchant named Francisco Quilo (1742-1817) made a name for himself in the city of Cádiz. He amassed a considerable fortune through his trading ventures and was known for his philanthropic efforts, supporting the construction of schools and hospitals in the region.
Another notable individual with the surname Quilo was Juana Quilo (1798-1872), a pioneering educator from Barcelona. She established one of the first schools for girls in the city and played a significant role in promoting women's education during a time when it was largely overlooked.
As the centuries passed, the Quilo surname continued to spread across Spain and its territories, with individuals bearing this name making contributions in various fields, including arts, literature, and commerce.
Demographics
Ancestry and ethnicity for Quilo
Among Census respondents with the surname Quilo, the largest self-reported group is Hispanic at 85.1%. The next largest groups are Asian/Pacific Islander (13.2%) and White (0.8%).
The bar chart below shows how Quilo 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 Quilo surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino85.1% · 103
- Asian and Pacific Islander13.2% · 16
- White0.8% · 1
- Black or African American0.8% · 1
Timeline
Historical Census data for Quilo
Quilo 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
#141,309
National surname rank
Recorded bearers 121
+3 bearers (+2.5%)
Per 100,000 0.04
Rank movement Down 169 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #141,140 | 118 | 0.04 | First available Census row | First available Census row |
| 2020 | #141,309 | 121 | 0.04 | +3 bearers (+2.5%) | Down 169 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 Quilo 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 | #141,140 | #141,309 | -0.1% |
| Count | 118 | 121 | 2.5% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Quilo bearers went from 118 to 121 (+2.5% change). The surname moved down 169 positions in the national ranking, going from #141,140 to #141,309.
FAQ
Quilo surname: questions and answers
How many people in the U.S. have the surname Quilo?
Name Census estimates that about 139 living Americans carry the surname Quilo. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Quilo?
Quilo ranks #141,309 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 121 people with the surname Quilo. That is different from the site's living-bearer estimate (139), 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 Quilo.
Has Quilo become more or less common over time?
Between 2010 and 2020, the surname Quilo went from 118 recorded bearers to 121. That is an increase of 3 (+2.5%). In the national ranking it fell from #141,140 to #141,309.
What does the Census say about the background of Quilo?
Among Census respondents with the surname Quilo, the largest self-reported group is Hispanic at 85.1%. The next largest groups are Asian/Pacific Islander (13.2%) and White (0.8%). 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 Quilo in the 2020 Census, accounting for 85.1% (103 people in the source table).
What is the full ancestry breakdown?
Quilo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (85.1%), Asian/Pacific Islander (13.2%), White (0.8%). 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 Quilo (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 Quilo mean?
A surname derived from the Spanish word for a weight unit, possibly referring to an occupation related to weighing or measurement. 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 Quilo (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 share the surname Quilo?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.