2000
#150,436
National surname rank
Recorded bearers 100
First available Census row
Per 100,000 0.04
Very Rare Last name
Mosiniak
An occupational surname indicating a maker of ropes or cords.
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Mosiniak. That puts it at #155,270 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,954,779 residents).
This page is the full Name Census profile for the Mosiniak 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
116
1 in 2,954,779
Census rank
#155,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
101
very rare in the US
Popularity narrative
The Census Bureau recorded 101 bearers of the surname Mosiniak in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155270th position in the national surname ranking.
Among Census respondents with the surname Mosiniak, the largest self-reported group is White at 93.1%. The next largest groups are Hispanic (3.0%) and Two or More Races (2.0%).
Origin
Meaning and origin of Mosiniak
The surname MOSINIAK is believed to have originated in the Slavic regions of Eastern Europe, likely in Poland or Belarus, during the medieval period. It is derived from the Slavic root "Mos-", which is thought to be related to the words "bridge" or "moss". Some linguists speculate that the name may have referred to someone who lived near a bridge or in a marshy area.
One of the earliest known records of the MOSINIAK surname dates back to the 15th century, when a man named Stanislaw MOSINIAK was mentioned in a document from the town of Krakow, Poland. This suggests that the name was already established in the region by that time.
In the 16th century, a notable figure with this surname was Jan MOSINIAK, a Polish nobleman and landowner who fought in the battles against the Teutonic Knights. His name is recorded in chronicles from the era, providing evidence of the surname's presence during the Renaissance.
During the 17th and 18th centuries, the MOSINIAK surname appeared in various parish records and land registries across Poland and Belarus. Some of these records may have included variations in spelling, such as MOSINIOK or MOSINIAK, reflecting regional dialects and scribal variations.
A prominent individual from this period was Michal MOSINIAK, a Polish military officer who served in the army of King Jan III Sobieski. He was born in 1650 and participated in several campaigns against the Ottoman Empire, including the famous Battle of Vienna in 1683.
In the 19th century, a notable bearer of the MOSINIAK surname was Pawel MOSINIAK, a Polish writer and poet who was born in 1820. He published several collections of poetry and was known for his romantic and patriotic themes.
Another individual of note was Wladyslaw MOSINIAK, a Polish engineer and inventor who lived from 1865 to 1942. He is credited with developing several innovative designs for bridges and other structures, which may have been influenced by the meaning of his surname.
While the MOSINIAK surname is relatively uncommon today, it has a rich history that spans several centuries and can be traced back to its origins in the Slavic regions of Eastern Europe.
Demographics
Ancestry and ethnicity for Mosiniak
Among Census respondents with the surname Mosiniak, the largest self-reported group is White at 93.1%. The next largest groups are Hispanic (3.0%) and Two or More Races (2.0%).
The bar chart below shows how Mosiniak 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 Mosiniak surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.1% · 94
- Hispanic or Latino3.0% · 3
- Two or more races2.0% · 2
- Black or African American1.0% · 1
- American Indian and Alaska Native1.0% · 1
Timeline
Historical Census data for Mosiniak
Mosiniak 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
#149,395
National surname rank
Recorded bearers 110
+10 bearers (+10.0%)
Per 100,000 0.04
Rank movement Up 1,041 places
2020
#155,270
National surname rank
Recorded bearers 101
-9 bearers (-8.2%)
Per 100,000 0.03
Rank movement Down 5,875 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #150,436 | 100 | 0.04 | First available Census row | First available Census row |
| 2010 | #149,395 | 110 | 0.04 | +10 bearers (+10.0%) | Up 1,041 places |
| 2020 | #155,270 | 101 | 0.03 | -9 bearers (-8.2%) | Down 5,875 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 Mosiniak 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 | #149,395 | #155,270 | -3.9% |
| Count | 110 | 101 | -8.2% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Mosiniak bearers went from 110 to 101 (-8.2% change). The surname moved down 5,875 positions in the national ranking, going from #149,395 to #155,270.
FAQ
Mosiniak surname: questions and answers
How many people in the U.S. have the surname Mosiniak?
Name Census estimates that about 116 living Americans carry the surname Mosiniak. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Mosiniak?
Mosiniak ranks #155,270 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 101 people with the surname Mosiniak. That is different from the site's living-bearer estimate (116), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Mosiniak.
Has Mosiniak become more or less common over time?
Between 2010 and 2020, the surname Mosiniak went from 110 recorded bearers to 101. That is a decrease of 9 (-8.2%). In the national ranking it fell from #149,395 to #155,270.
What does the Census say about the background of Mosiniak?
Among Census respondents with the surname Mosiniak, the largest self-reported group is White at 93.1%. The next largest groups are Hispanic (3.0%) and Two or More Races (2.0%). 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 Mosiniak in the 2020 Census, accounting for 93.1% (94 people in the source table).
What is the full ancestry breakdown?
Mosiniak appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.1%), Hispanic (3.0%), Two or More Races (2.0%). 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 Mosiniak (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 Mosiniak mean?
An occupational surname indicating a maker of ropes or cords. 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 Mosiniak (0.03 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 Mosiniak?
Want to know how many people have the surname Mosiniak? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.