2000
#131,366
National surname rank
Recorded bearers 119
First available Census row
Per 100,000 0.04
Very Rare Last name
Osga
A variant of the surname Oscarson or Oscar's son.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Osga. 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 Osga 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 Osga 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 Osga, the largest self-reported group is White at 87.6%. The next largest groups are Hispanic (7.4%) and Two or More Races (3.3%).
Origin
Meaning and origin of Osga
The surname OSGA originated in the Iberian Peninsula during the medieval era, specifically in the region of Asturias in northern Spain. It is believed to have derived from the Asturian word "osga," which referred to a type of thick fog or mist commonly found in the mountainous areas of the region.
One of the earliest recorded instances of the name OSGA can be found in the Becerro de las Behetrías de Castilla, a 14th-century manuscript that documented the distribution of lands and privileges in the Kingdom of Castile. In this document, a certain Rodrigo Osga is mentioned as a landowner in the region of Asturias.
During the 15th century, the OSGA surname began to spread beyond Asturias to other parts of Spain. Notable individuals bearing this name included Juan Osga, a merchant from Burgos who was involved in the lucrative trade routes between Spain and the Low Countries.
As the Spanish Empire expanded into the Americas, some members of the OSGA family participated in the colonization efforts. One such individual was Pedro Osga, who was born in Seville in 1524 and later became a prominent landowner in the Viceroyalty of New Spain (present-day Mexico).
In the 17th century, a branch of the OSGA family settled in the Canary Islands, where they became involved in the flourishing wine trade. Francisco Osga, born in 1635 on the island of Tenerife, was a renowned vintner whose wines were exported to various parts of Europe.
While the OSGA surname is not as common as some other Spanish surnames, it has persisted through the centuries. In the 19th century, a notable figure bearing this name was Dolores Osga, a Spanish author and activist who advocated for women's rights and education.
Demographics
Ancestry and ethnicity for Osga
Among Census respondents with the surname Osga, the largest self-reported group is White at 87.6%. The next largest groups are Hispanic (7.4%) and Two or More Races (3.3%).
The bar chart below shows how Osga 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 Osga surname at the time of the 2020 Census, not any inherent property of the name itself.
- White87.6% · 106
- Hispanic or Latino7.4% · 9
- Two or more races3.3% · 4
- Asian and Pacific Islander1.7% · 2
Timeline
Historical Census data for Osga
Osga 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
#133,048
National surname rank
Recorded bearers 127
+8 bearers (+6.7%)
Per 100,000 0.04
Rank movement Down 1,682 places
2020
#141,309
National surname rank
Recorded bearers 121
-6 bearers (-4.7%)
Per 100,000 0.04
Rank movement Down 8,261 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #131,366 | 119 | 0.04 | First available Census row | First available Census row |
| 2010 | #133,048 | 127 | 0.04 | +8 bearers (+6.7%) | Down 1,682 places |
| 2020 | #141,309 | 121 | 0.04 | -6 bearers (-4.7%) | Down 8,261 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 Osga 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 | #133,048 | #141,309 | -6.2% |
| Count | 127 | 121 | -4.7% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Osga bearers went from 127 to 121 (-4.7% change). The surname moved down 8,261 positions in the national ranking, going from #133,048 to #141,309.
FAQ
Osga surname: questions and answers
How many people in the U.S. have the surname Osga?
Name Census estimates that about 139 living Americans carry the surname Osga. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Osga?
Osga 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 Osga. 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 Osga.
Has Osga become more or less common over time?
Between 2010 and 2020, the surname Osga went from 127 recorded bearers to 121. That is a decrease of 6 (-4.7%). In the national ranking it fell from #133,048 to #141,309.
What does the Census say about the background of Osga?
Among Census respondents with the surname Osga, the largest self-reported group is White at 87.6%. The next largest groups are Hispanic (7.4%) and Two or More Races (3.3%). 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?
White is the largest self-reported group for the surname Osga in the 2020 Census, accounting for 87.6% (106 people in the source table).
What is the full ancestry breakdown?
Osga appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (87.6%), Hispanic (7.4%), Two or More Races (3.3%). 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 Osga (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 Osga mean?
A variant of the surname Oscarson or Oscar's son. 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 Osga (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 surname Osga?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.