2000
#134,929
National surname rank
Recorded bearers 115
First available Census row
Per 100,000 0.04
Very Rare Last name
Ocacio
A Spanish surname derived from the Latin word "otium," meaning leisure or inactivity.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Ocacio. 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 Ocacio 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 Ocacio 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 Ocacio, the largest self-reported group is Hispanic at 71.9%. The next largest groups are White (18.2%) and Black (4.1%).
Origin
Meaning and origin of Ocacio
The surname OCACIO has its origins in Spain, with the earliest records dating back to the 13th century. It is believed to have derived from the Spanish word "ocaso," which means "sunset" or "decline." This name was likely given to someone who lived near or worked in an area where the sun set, or it could have been a descriptive name for someone who lived during the declining years of their life.
The name OCACIO first appeared in the medieval records of the Kingdom of Aragon, a powerful state in northeastern Spain during the Middle Ages. One of the earliest recorded instances of this name was in a land grant document from 1278, where a certain Juan Ocacio was listed as a landowner in the town of Teruel.
In the 14th century, the OCACIO name was also found in the coastal regions of Valencia and Catalonia, suggesting that some families with this surname may have been involved in maritime activities or lived near the sea.
One notable bearer of the OCACIO name was Rodrigo Ocacio, a Spanish explorer who accompanied Hernán Cortés on his expedition to Mexico in the early 16th century. Rodrigo Ocacio is mentioned in several accounts of the Spanish conquest, including Bernal Díaz del Castillo's "The True History of the Conquest of New Spain."
Another significant figure in Spanish history with the OCACIO surname was Juana Ocacio, a noblewoman who lived during the 16th century. She was a prominent patron of the arts and supported several artists and writers in her time.
In the 17th century, the OCACIO name appeared in the records of the Spanish Inquisition, where a certain Diego Ocacio was tried and convicted for heretical beliefs. This incident highlights the religious tensions and persecutions that took place during that era.
The OCACIO surname also has connections to the region of Galicia in northwestern Spain. In the 18th century, a prominent Galician writer and historian named Manuel Ocacio authored several works documenting the history and culture of his homeland.
Throughout the centuries, the OCACIO name has undergone various spelling variations, such as Ocazio, Ocasio, and Ocasio, reflecting the evolving nature of language and regional dialects in Spain.
Demographics
Ancestry and ethnicity for Ocacio
Among Census respondents with the surname Ocacio, the largest self-reported group is Hispanic at 71.9%. The next largest groups are White (18.2%) and Black (4.1%).
The bar chart below shows how Ocacio 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 Ocacio surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino71.9% · 87
- White18.2% · 22
- Black or African American4.1% · 5
- Two or more races2.5% · 3
- Asian and Pacific Islander1.7% · 2
- American Indian and Alaska Native1.7% · 2
Timeline
Historical Census data for Ocacio
Ocacio 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
#148,347
National surname rank
Recorded bearers 111
-4 bearers (-3.5%)
Per 100,000 0.04
Rank movement Down 13,418 places
2020
#141,309
National surname rank
Recorded bearers 121
+10 bearers (+9.0%)
Per 100,000 0.04
Rank movement Up 7,038 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #134,929 | 115 | 0.04 | First available Census row | First available Census row |
| 2010 | #148,347 | 111 | 0.04 | -4 bearers (-3.5%) | Down 13,418 places |
| 2020 | #141,309 | 121 | 0.04 | +10 bearers (+9.0%) | Up 7,038 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 Ocacio 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 | #148,347 | #141,309 | 4.7% |
| Count | 111 | 121 | 9.0% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Ocacio bearers went from 111 to 121 (+9.0% change). The surname moved up 7,038 positions in the national ranking, going from #148,347 to #141,309.
FAQ
Ocacio surname: questions and answers
How many people in the U.S. have the surname Ocacio?
Name Census estimates that about 139 living Americans carry the surname Ocacio. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Ocacio?
Ocacio 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 Ocacio. 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 Ocacio.
Has Ocacio become more or less common over time?
Between 2010 and 2020, the surname Ocacio went from 111 recorded bearers to 121. That is an increase of 10 (+9.0%). In the national ranking it rose from #148,347 to #141,309.
What does the Census say about the background of Ocacio?
Among Census respondents with the surname Ocacio, the largest self-reported group is Hispanic at 71.9%. The next largest groups are White (18.2%) and Black (4.1%). 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 Ocacio in the 2020 Census, accounting for 71.9% (87 people in the source table).
What is the full ancestry breakdown?
Ocacio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (71.9%), White (18.2%), Black (4.1%). 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 Ocacio (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 Ocacio mean?
A Spanish surname derived from the Latin word "otium," meaning leisure or inactivity. 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 Ocacio (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 Americans have the surname Ocacio?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.