2000
#124,109
National surname rank
Recorded bearers 128
First available Census row
Per 100,000 0.05
Very Rare Last name
Mazalewski
A Polish surname likely derived from the place name Mazalewo.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Mazalewski. 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 Mazalewski 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 Mazalewski 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 Mazalewski, the largest self-reported group is White at 96.7%. The next largest groups are Two or More Races (1.7%) and Asian/Pacific Islander (0.8%).
Origin
Meaning and origin of Mazalewski
The surname Mazalewski is of Polish origin, traced back to the late medieval period in the regions of Mazovia and Lesser Poland. Its roots can be found in the Polish word "maźnica," meaning a place where tar or pitch was produced, suggesting the name's initial association with those involved in this trade or industry.
One of the earliest recorded instances of the Mazalewski name appears in the 16th-century parish records of the town of Radom, located in the historical region of Mazovia. The name is also documented in the registers of the city of Krakow, a prominent cultural and economic center of the Polish-Lithuanian Commonwealth during the Renaissance era.
In the 17th century, a notable bearer of the Mazalewski name was Jakub Mazalewski, a merchant and landowner from the town of Kazimierz Dolny, renowned for his philanthropic endeavors and contributions to the local community. His legacy is preserved in the town's historical archives.
The 18th century saw the rise of Jan Mazalewski, a prominent figure in the Polish Enlightenment movement. Born in 1705 in Warsaw, he was a philosopher, writer, and translator who played a significant role in disseminating progressive ideas and promoting educational reforms in the Polish-Lithuanian Commonwealth.
During the 19th century, the Mazalewski name gained further recognition through the accomplishments of Józef Mazalewski, a renowned painter and art professor. Born in 1818 in Krakow, his works are celebrated for their vivid portrayal of Polish landscapes and rural life, capturing the essence of the country's cultural heritage.
Another notable figure bearing the Mazalewski surname was Wacław Mazalewski, a distinguished military officer and strategist who served in the Polish Army during World War I and the subsequent Polish-Soviet War. Born in 1876 in the town of Sandomierz, he played a crucial role in the defense of Warsaw and is celebrated as a national hero for his contributions to Poland's independence.
Throughout its history, the Mazalewski name has been associated with various occupations, from artisans and merchants to intellectuals and military leaders, reflecting the diverse paths taken by those who carried this distinctive Polish surname.
Demographics
Ancestry and ethnicity for Mazalewski
Among Census respondents with the surname Mazalewski, the largest self-reported group is White at 96.7%. The next largest groups are Two or More Races (1.7%) and Asian/Pacific Islander (0.8%).
The bar chart below shows how Mazalewski 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 Mazalewski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.7% · 117
- Two or more races1.7% · 2
- Asian and Pacific Islander0.8% · 1
- American Indian and Alaska Native0.8% · 1
Timeline
Historical Census data for Mazalewski
Mazalewski 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
#145,220
National surname rank
Recorded bearers 114
-14 bearers (-10.9%)
Per 100,000 0.04
Rank movement Down 21,111 places
2020
#141,309
National surname rank
Recorded bearers 121
+7 bearers (+6.1%)
Per 100,000 0.04
Rank movement Up 3,911 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #124,109 | 128 | 0.05 | First available Census row | First available Census row |
| 2010 | #145,220 | 114 | 0.04 | -14 bearers (-10.9%) | Down 21,111 places |
| 2020 | #141,309 | 121 | 0.04 | +7 bearers (+6.1%) | Up 3,911 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 Mazalewski 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 | #145,220 | #141,309 | 2.7% |
| Count | 114 | 121 | 6.1% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Mazalewski bearers went from 114 to 121 (+6.1% change). The surname moved up 3,911 positions in the national ranking, going from #145,220 to #141,309.
FAQ
Mazalewski surname: questions and answers
How many people in the U.S. have the surname Mazalewski?
Name Census estimates that about 139 living Americans carry the surname Mazalewski. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Mazalewski?
Mazalewski 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 Mazalewski. 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 Mazalewski.
Has Mazalewski become more or less common over time?
Between 2010 and 2020, the surname Mazalewski went from 114 recorded bearers to 121. That is an increase of 7 (+6.1%). In the national ranking it rose from #145,220 to #141,309.
What does the Census say about the background of Mazalewski?
Among Census respondents with the surname Mazalewski, the largest self-reported group is White at 96.7%. The next largest groups are Two or More Races (1.7%) and Asian/Pacific Islander (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 Mazalewski in the 2020 Census, accounting for 96.7% (117 people in the source table).
What is the full ancestry breakdown?
Mazalewski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.7%), Two or More Races (1.7%), Asian/Pacific Islander (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 Mazalewski (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 Mazalewski mean?
A Polish surname likely derived from the place name Mazalewo. 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 Mazalewski (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 Mazalewski?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.