2000
#144,908
National surname rank
Recorded bearers 105
First available Census row
Per 100,000 0.04
Very Rare Last name
Jacoboski
A Polish variant spelling of the surname Jakubowski, derived from the given name Jacob.
According to the 2020 US Census Bureau surname tables, roughly 126 Americans carry the last name Jacoboski. That puts it at #149,446 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,720,273 residents).
This page is the full Name Census profile for the Jacoboski 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
126
1 in 2,720,273
Census rank
#149,446
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
110
very rare in the US
Popularity narrative
The Census Bureau recorded 110 bearers of the surname Jacoboski in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 149446th position in the national surname ranking.
Among Census respondents with the surname Jacoboski, the largest self-reported group is White at 96.4%. The next largest groups are Two or More Races (2.7%) and American Indian/Alaska Native (0.9%).
Origin
Meaning and origin of Jacoboski
The surname Jacoboski has its origins in Poland, with the earliest records dating back to the 16th century. The name is believed to be a variant or derivative of the more common Polish surname Jakubowski, which itself is derived from the given name Jakub, the Polish equivalent of Jacob.
One of the earliest known mentions of the Jacoboski surname can be found in the Metryka Koronna, a collection of historical records from the Polish-Lithuanian Commonwealth, where a certain Mateusz Jacoboski is listed as a landowner in the Krakow region in the year 1587.
During the 17th and 18th centuries, the Jacoboski name was particularly prevalent in the regions of Silesia and Pomerania, which at the time were part of the Kingdom of Prussia. Records from this period show several Jacoboski families living in towns and villages such as Gliwice, Bytom, and Szczecin.
In the late 19th century, a notable figure bearing the Jacoboski surname was Ignacy Jacoboski (1835-1912), a Polish philosopher and writer who published several works on ethics and morality. Another prominent individual was Maria Jacoboski (1876-1944), a renowned painter and artist known for her landscapes and portraits depicting life in rural Poland.
The Jacoboski name also found its way to other parts of Europe through migration and emigration. In the early 20th century, a family by the name of Jacoboski settled in the German city of Hamburg, where they established a successful textile business. One member of this family, Hans Jacoboski (1892-1976), later became a respected philanthropist and donated a significant portion of his wealth to various charitable causes.
Another notable bearer of the Jacoboski surname was Stanislaw Jacoboski (1901-1987), a Polish-American scientist and engineer who made significant contributions to the development of radar technology during World War II while working for the United States Army.
Throughout its history, the Jacoboski name has undergone various spelling variations, such as Jakoboski, Jakubosky, and Jakuboski, reflecting the regional dialects and linguistic influences of the areas where it was commonly used.
Demographics
Ancestry and ethnicity for Jacoboski
Among Census respondents with the surname Jacoboski, the largest self-reported group is White at 96.4%. The next largest groups are Two or More Races (2.7%) and American Indian/Alaska Native (0.9%).
The bar chart below shows how Jacoboski 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 Jacoboski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.4% · 106
- Two or more races2.7% · 3
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Jacoboski
Jacoboski 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
+6 bearers (+5.7%)
Per 100,000 0.04
Rank movement Down 3,439 places
2020
#149,446
National surname rank
Recorded bearers 110
-1 bearers (-0.9%)
Per 100,000 0.04
Rank movement Down 1,099 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #144,908 | 105 | 0.04 | First available Census row | First available Census row |
| 2010 | #148,347 | 111 | 0.04 | +6 bearers (+5.7%) | Down 3,439 places |
| 2020 | #149,446 | 110 | 0.04 | -1 bearers (-0.9%) | Down 1,099 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 Jacoboski 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 | #149,446 | -0.7% |
| Count | 111 | 110 | -0.9% |
| Per 100K | 0.04 | 0.04 | -8.0% |
Between the 2010 and 2020 Census, the number of Jacoboski bearers went from 111 to 110 (-0.9% change). The surname moved down 1,099 positions in the national ranking, going from #148,347 to #149,446.
FAQ
Jacoboski surname: questions and answers
How many people in the U.S. have the surname Jacoboski?
Name Census estimates that about 126 living Americans carry the surname Jacoboski. Using the current population baseline, that works out to roughly 1 in 2,720,273 residents.
How common is Jacoboski?
Jacoboski ranks #149,446 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 110 people with the surname Jacoboski. That is different from the site's living-bearer estimate (126), 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 Jacoboski.
Has Jacoboski become more or less common over time?
Between 2010 and 2020, the surname Jacoboski went from 111 recorded bearers to 110. That is a decrease of 1 (-0.9%). In the national ranking it fell from #148,347 to #149,446.
What does the Census say about the background of Jacoboski?
Among Census respondents with the surname Jacoboski, the largest self-reported group is White at 96.4%. The next largest groups are Two or More Races (2.7%) and American Indian/Alaska Native (0.9%). 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?
White is the largest self-reported group for the surname Jacoboski in the 2020 Census, accounting for 96.4% (106 people in the source table).
What is the full ancestry breakdown?
Jacoboski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.4%), Two or More Races (2.7%), American Indian/Alaska Native (0.9%). 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 Jacoboski (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 Jacoboski mean?
A Polish variant spelling of the surname Jakubowski, derived from the given name Jacob. 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 Jacoboski (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 are called Jacoboski?
If you just want to know how many people have the last name Jacoboski, HowManyOfMe.org gives you the headline number in one glance.