2000
#14,259
National surname rank
Recorded bearers 1,929
First available Census row
Per 100,000 0.72
Rare Last name
Astudillo
A Spanish habitational surname indicating someone from any of the various places named Astudillo in Spain.
According to the 2020 US Census Bureau surname tables, roughly 3,015 Americans carry the last name Astudillo. That puts it at #11,463 in the national surname ranking, appearing at a frequency of 0.88 per 100,000 people (about 1 in 113,683 residents).
This page is the full Name Census profile for the Astudillo 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
3.0K
1 in 113,683
Census rank
#11,463
2020 decennial data
Per 100,000
0.9
Frequency rate
Recorded bearers
2.6K
rare in the US
Popularity narrative
The Census Bureau recorded 2,629 bearers of the surname Astudillo in its 2020 decennial surname file. At a rate of 0.88 per 100,000 residents, it holds the 11463rd position in the national surname ranking.
Among Census respondents with the surname Astudillo, the largest self-reported group is Hispanic at 90.0%. The next largest groups are Asian/Pacific Islander (5.3%) and White (4.2%).
Origin
Meaning and origin of Astudillo
The surname Astudillo is of Spanish origin, with roots dating back to the medieval period in the Iberian Peninsula. It is believed to have originated from a place name, which was a common practice during that era.
The name Astudillo likely derives from the town of Astudillo, located in the province of Palencia, in the northern region of Castile and León, Spain. This town's name is thought to have evolved from the Latin word "strata," meaning "paved road" or "path," suggesting that the town may have been situated along an important Roman route.
In historical records, one of the earliest known references to the surname Astudillo can be found in the "Becerro de las Behetrías de Castilla," a medieval census document from the 14th century. This document listed landowners and their properties in the region of Castile.
Notably, in the 15th century, Diego de Astudillo was a Spanish nobleman and military commander who served under King Juan II of Castile. He participated in the conquest of Granada and was renowned for his bravery and military achievements.
Another prominent figure with this surname was Pedro de Astudillo, a Spanish explorer and conquistador who accompanied Hernán Cortés in the conquest of Mexico in the early 16th century. He played a significant role in the exploration and colonization of the American continent.
In the 17th century, Juan de Astudillo was a renowned Spanish playwright and poet. He was celebrated for his contributions to the Spanish Golden Age of literature.
During the 18th century, Manuel Astudillo y Zuluaga was a Spanish military officer who served in the Spanish Army and participated in various campaigns in the Americas.
In the 19th century, José María Astudillo was a prominent Mexican politician and diplomat who served as the Minister of Foreign Affairs for Mexico from 1841 to 1842.
Throughout history, the surname Astudillo has been found in various regions of Spain, as well as in Latin American countries like Mexico, Colombia, and Venezuela, due to Spanish colonization and emigration.
Demographics
Ancestry and ethnicity for Astudillo
Among Census respondents with the surname Astudillo, the largest self-reported group is Hispanic at 90.0%. The next largest groups are Asian/Pacific Islander (5.3%) and White (4.2%).
The bar chart below shows how Astudillo 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 Astudillo surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino90.0% · 2,365
- Asian and Pacific Islander5.3% · 139
- White4.2% · 110
- Black or African American0.3% · 9
- Two or more races0.2% · 4
- American Indian and Alaska Native0.1% · 2
Timeline
Historical Census data for Astudillo
Astudillo 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
#11,127
National surname rank
Recorded bearers 2,849
+920 bearers (+47.7%)
Per 100,000 0.97
Rank movement Up 3,132 places
2020
#11,463
National surname rank
Recorded bearers 2,629
-220 bearers (-7.7%)
Per 100,000 0.88
Rank movement Down 336 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #14,259 | 1,929 | 0.72 | First available Census row | First available Census row |
| 2010 | #11,127 | 2,849 | 0.97 | +920 bearers (+47.7%) | Up 3,132 places |
| 2020 | #11,463 | 2,629 | 0.88 | -220 bearers (-7.7%) | Down 336 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 Astudillo 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 | #11,127 | #11,463 | -3.0% |
| Count | 2,849 | 2,629 | -7.7% |
| Per 100K | 0.97 | 0.88 | -9.3% |
Between the 2010 and 2020 Census, the number of Astudillo bearers went from 2,849 to 2,629 (-7.7% change). The surname moved down 336 positions in the national ranking, going from #11,127 to #11,463.
FAQ
Astudillo surname: questions and answers
How many people in the U.S. have the surname Astudillo?
Name Census estimates that about 3,015 living Americans carry the surname Astudillo. Using the current population baseline, that works out to roughly 1 in 113,683 residents.
How common is Astudillo?
Astudillo ranks #11,463 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.88 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 2,629 people with the surname Astudillo. That is different from the site's living-bearer estimate (3,015), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.88 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.88 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 Astudillo.
Has Astudillo become more or less common over time?
Between 2010 and 2020, the surname Astudillo went from 2,849 recorded bearers to 2,629. That is a decrease of 220 (-7.7%). In the national ranking it fell from #11,127 to #11,463.
What does the Census say about the background of Astudillo?
Among Census respondents with the surname Astudillo, the largest self-reported group is Hispanic at 90.0%. The next largest groups are Asian/Pacific Islander (5.3%) and White (4.2%). 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 Astudillo in the 2020 Census, accounting for 90.0% (2,365 people in the source table).
What is the full ancestry breakdown?
Astudillo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (90.0%), Asian/Pacific Islander (5.3%), White (4.2%). 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 Astudillo (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 Astudillo mean?
A Spanish habitational surname indicating someone from any of the various places named Astudillo in Spain. 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 Astudillo (0.88 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 common is the surname Astudillo?
Our sister site HowManyOfMe.org answers how many Americans have the surname Astudillo at a glance, with the living-bearer count up front.