2000
#130,443
National surname rank
Recorded bearers 120
First available Census row
Per 100,000 0.04
Very Rare Last name
Morosko
A locational surname originating from eastern Europe or Russia.
According to the 2020 US Census Bureau surname tables, roughly 135 Americans carry the last name Morosko. That puts it at #143,511 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,538,921 residents).
This page is the full Name Census profile for the Morosko 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
135
1 in 2,538,921
Census rank
#143,511
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
118
very rare in the US
Popularity narrative
The Census Bureau recorded 118 bearers of the surname Morosko in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 143511th position in the national surname ranking.
Among Census respondents with the surname Morosko, the largest self-reported group is White at 94.9%. The next largest groups are Two or More Races (4.2%) and Hispanic (0.8%).
Origin
Meaning and origin of Morosko
The surname Morosko is of Slavic origin, believed to have originated in the regions of modern-day Poland and Ukraine during the medieval period. It is derived from the Slavic root "mor," which means "sea" or "ocean," suggesting that the name may have initially been a descriptive reference to someone who lived near a body of water.
One of the earliest recorded instances of the Morosko surname can be found in the Galician-Volhynian Chronicles, a historical manuscript dating back to the 13th century. This document mentions a nobleman named Iván Morosko, who served as a military commander under Prince Daniil of Galicia-Volhynia.
In the 15th century, the name appears in various Polish court records, including those from the city of Kraków. Notable individuals from this period include Jan Morosko, a merchant who traded goods along the Vistula River, and Katarzyna Morosko, a landowner from the village of Gorlice.
During the 16th and 17th centuries, the Morosko name became more widespread throughout Eastern Europe, with several families bearing this surname residing in the territories of the Polish-Lithuanian Commonwealth. One prominent figure was Andrzej Morosko, a military officer who fought in the Polish-Muscovite War of 1609-1618.
The 18th century saw the emergence of a notable Morosko family in the region of Galicia, which was part of the Austro-Hungarian Empire at the time. This family produced several scholars and intellectuals, including Teodor Morosko (1753-1822), a philosopher and professor at the University of Lviv.
In the 19th century, the Morosko name spread further throughout Eastern and Central Europe, with individuals bearing this surname found in various professions, from artisans to academics. One noteworthy figure was Aleksandra Morosko (1825-1892), a Polish writer and poet who published several collections of poetry and short stories.
As the 20th century dawned, the Morosko surname continued to be prominent in parts of Eastern Europe, particularly in Ukraine and Poland. Among the notable individuals from this period was Bohdan Morosko (1901-1975), a Ukrainian artist and painter known for his landscape and portrait works.
Demographics
Ancestry and ethnicity for Morosko
Among Census respondents with the surname Morosko, the largest self-reported group is White at 94.9%. The next largest groups are Two or More Races (4.2%) and Hispanic (0.8%).
The bar chart below shows how Morosko 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 Morosko surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.9% · 112
- Two or more races4.2% · 5
- Hispanic or Latino0.8% · 1
Timeline
Historical Census data for Morosko
Morosko 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
#139,228
National surname rank
Recorded bearers 120
+0 bearers (+0.0%)
Per 100,000 0.04
Rank movement Down 8,785 places
2020
#143,511
National surname rank
Recorded bearers 118
-2 bearers (-1.7%)
Per 100,000 0.04
Rank movement Down 4,283 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #130,443 | 120 | 0.04 | First available Census row | First available Census row |
| 2010 | #139,228 | 120 | 0.04 | +0 bearers (+0.0%) | Down 8,785 places |
| 2020 | #143,511 | 118 | 0.04 | -2 bearers (-1.7%) | Down 4,283 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 Morosko 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 | #139,228 | #143,511 | -3.1% |
| Count | 120 | 118 | -1.7% |
| Per 100K | 0.04 | 0.04 | -1.3% |
Between the 2010 and 2020 Census, the number of Morosko bearers went from 120 to 118 (-1.7% change). The surname moved down 4,283 positions in the national ranking, going from #139,228 to #143,511.
FAQ
Morosko surname: questions and answers
How many people in the U.S. have the surname Morosko?
Name Census estimates that about 135 living Americans carry the surname Morosko. Using the current population baseline, that works out to roughly 1 in 2,538,921 residents.
How common is Morosko?
Morosko ranks #143,511 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 118 people with the surname Morosko. That is different from the site's living-bearer estimate (135), 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 Morosko.
Has Morosko become more or less common over time?
Between 2010 and 2020, the surname Morosko went from 120 recorded bearers to 118. That is a decrease of 2 (-1.7%). In the national ranking it fell from #139,228 to #143,511.
What does the Census say about the background of Morosko?
Among Census respondents with the surname Morosko, the largest self-reported group is White at 94.9%. The next largest groups are Two or More Races (4.2%) and Hispanic (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?
White is the largest self-reported group for the surname Morosko in the 2020 Census, accounting for 94.9% (112 people in the source table).
What is the full ancestry breakdown?
Morosko appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.9%), Two or More Races (4.2%), Hispanic (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 Morosko (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 Morosko mean?
A locational surname originating from eastern Europe or Russia. 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 Morosko (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 Morosko?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.