2000
#83,618
National surname rank
Recorded bearers 209
First available Census row
Per 100,000 0.08
Very Rare Last name
Januszkiewicz
A Polish surname derived from the given name Jan, a diminutive form of John.
According to the 2020 US Census Bureau surname tables, roughly 221 Americans carry the last name Januszkiewicz. That puts it at #100,083 in the national surname ranking, appearing at a frequency of 0.06 per 100,000 people (about 1 in 1,550,925 residents).
This page is the full Name Census profile for the Januszkiewicz 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
221
1 in 1,550,925
Census rank
#100,083
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
193
very rare in the US
Popularity narrative
The Census Bureau recorded 193 bearers of the surname Januszkiewicz in its 2020 decennial surname file. At a rate of 0.06 per 100,000 residents, it holds the 100083rd position in the national surname ranking.
Among Census respondents with the surname Januszkiewicz, the largest self-reported group is White at 94.3%. The next largest groups are Hispanic (5.7%).
Origin
Meaning and origin of Januszkiewicz
The surname Januszkiewicz is of Polish origin, tracing its roots back to the 16th century. It is believed to have derived from the Polish given name Januszy, which itself is a form of the Latin name Januarius, meaning "of January." The suffix "-kiewicz" is a Polish patronymic, indicating "son of," suggesting that the name likely referred to the son of someone named Januszy.
One of the earliest recorded instances of the surname Januszkiewicz can be found in the Metryka Koronna, a collection of documents from the Polish Crown Chancery, dating back to the late 16th century. These records mention individuals with the surname Januszkiewicz residing in various regions of what is now modern-day Poland.
During the 17th and 18th centuries, the Januszkiewicz name appears in several historical documents and records from various parts of the Polish-Lithuanian Commonwealth. For example, in 1672, a nobleman named Maciej Januszkiewicz is mentioned in a legal document from the town of Grodno, located in present-day Belarus.
One notable bearer of the Januszkiewicz surname was Franciszek Januszkiewicz (1724-1796), a Polish Roman Catholic priest and theologian who served as a professor at the University of Vilnius in the late 18th century. His writings on moral theology and canon law were widely influential during his time.
In the 19th century, the Januszkiewicz name gained prominence in the field of art. Stanisław Januszkiewicz (1815-1879) was a Polish painter and illustrator known for his depictions of landscapes and historical scenes. His works are housed in various museums and galleries across Poland.
Another notable figure was Jan Januszkiewicz (1867-1941), a Polish engineer and inventor who made significant contributions to the development of early aviation technology. He designed and built several experimental aircraft in the early 20th century, including one of the first successful monoplane designs.
As the centuries passed, the Januszkiewicz name continued to spread across various regions of Poland and beyond, with families bearing this surname establishing themselves in different parts of the country and neighboring territories.
Demographics
Ancestry and ethnicity for Januszkiewicz
Among Census respondents with the surname Januszkiewicz, the largest self-reported group is White at 94.3%. The next largest groups are Hispanic (5.7%).
The bar chart below shows how Januszkiewicz 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 Januszkiewicz surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.3% · 182
- Hispanic or Latino5.7% · 11
Timeline
Historical Census data for Januszkiewicz
Januszkiewicz 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
#88,020
National surname rank
Recorded bearers 211
+2 bearers (+1.0%)
Per 100,000 0.07
Rank movement Down 4,402 places
2020
#100,083
National surname rank
Recorded bearers 193
-18 bearers (-8.5%)
Per 100,000 0.06
Rank movement Down 12,063 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #83,618 | 209 | 0.08 | First available Census row | First available Census row |
| 2010 | #88,020 | 211 | 0.07 | +2 bearers (+1.0%) | Down 4,402 places |
| 2020 | #100,083 | 193 | 0.06 | -18 bearers (-8.5%) | Down 12,063 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 Januszkiewicz 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 | #88,020 | #100,083 | -13.7% |
| Count | 211 | 193 | -8.5% |
| Per 100K | 0.07 | 0.06 | -7.8% |
Between the 2010 and 2020 Census, the number of Januszkiewicz bearers went from 211 to 193 (-8.5% change). The surname moved down 12,063 positions in the national ranking, going from #88,020 to #100,083.
FAQ
Januszkiewicz surname: questions and answers
How many people in the U.S. have the surname Januszkiewicz?
Name Census estimates that about 221 living Americans carry the surname Januszkiewicz. Using the current population baseline, that works out to roughly 1 in 1,550,925 residents.
How common is Januszkiewicz?
Januszkiewicz ranks #100,083 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.06 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 193 people with the surname Januszkiewicz. That is different from the site's living-bearer estimate (221), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.06 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.06 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 Januszkiewicz.
Has Januszkiewicz become more or less common over time?
Between 2010 and 2020, the surname Januszkiewicz went from 211 recorded bearers to 193. That is a decrease of 18 (-8.5%). In the national ranking it fell from #88,020 to #100,083.
What does the Census say about the background of Januszkiewicz?
Among Census respondents with the surname Januszkiewicz, the largest self-reported group is White at 94.3%. The next largest groups are Hispanic (5.7%). 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 Januszkiewicz in the 2020 Census, accounting for 94.3% (182 people in the source table).
What is the full ancestry breakdown?
Januszkiewicz appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.3%), Hispanic (5.7%). 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 Januszkiewicz (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 Januszkiewicz mean?
A Polish surname derived from the given name Jan, a diminutive form of John. 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 Januszkiewicz (0.06 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 last name Januszkiewicz?
See how common the surname Januszkiewicz is on HowManyOfMe.org, our sister site built around that single question.