2000
#127,186
National surname rank
Recorded bearers 124
First available Census row
Per 100,000 0.05
Very Rare Last name
Ruczynski
A Polish surname likely derived from a geographical location or place name.
According to the 2020 US Census Bureau surname tables, roughly 130 Americans carry the last name Ruczynski. That puts it at #147,221 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,636,572 residents).
This page is the full Name Census profile for the Ruczynski 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
130
1 in 2,636,572
Census rank
#147,221
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
113
very rare in the US
Popularity narrative
The Census Bureau recorded 113 bearers of the surname Ruczynski in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147221st position in the national surname ranking.
Among Census respondents with the surname Ruczynski, the largest self-reported group is White at 98.2%. The next largest groups are Hispanic (0.9%) and Two or More Races (0.9%).
Origin
Meaning and origin of Ruczynski
The surname Ruczynski has its origins in Poland, emerging in the late Middle Ages around the 15th century. It is derived from the Polish word "ruczynski," which means "of the stream" or "from the stream." This suggests that the name's earliest bearers may have lived near a small river or stream.
One of the earliest recorded instances of the name Ruczynski can be found in the Akta Grodzkie, a collection of historical records from the Krakow region dating back to the 16th century. These records mention a certain Jan Ruczynski, a landowner from the village of Ruczynski (now known as Ruczyn) near Krakow.
In the 17th century, the name appears in various church records and tax registers across different regions of Poland. Notable individuals from this period include Jakub Ruczynski (1612-1678), a prominent lawyer and legal scholar who served as a judge in the city of Poznan.
The 18th century saw the rise of several Ruczynski families in the nobility and gentry classes. One notable figure was Franciszek Ruczynski (1732-1804), a Polish military officer who fought in the Kosciuszko Uprising against the Russian Empire.
As the name spread across Poland, it also took on various spellings and regional variations, such as Ruczyński, Ruczański, and Ruczenko. These variations often reflected the local dialects and linguistic influences of different regions.
In the 19th century, the Ruczynski name gained further prominence with individuals like Wladyslaw Ruczynski (1823-1892), a renowned painter and art teacher who helped establish the Academy of Fine Arts in Krakow.
Towards the end of the 19th century and into the early 20th century, several Ruczynski families emigrated from Poland to other parts of Europe and the Americas, carrying their surname with them. One notable figure from this period was Kazimierz Ruczynski (1876-1947), a Polish-American engineer and inventor who contributed significantly to the development of early aviation technology.
Throughout its history, the Ruczynski surname has been borne by various individuals from different walks of life, including writers, artists, scientists, and political figures. While the name's origins can be traced back to a specific region of Poland, it has since spread across the country and beyond, becoming a part of the rich tapestry of Polish surnames.
Demographics
Ancestry and ethnicity for Ruczynski
Among Census respondents with the surname Ruczynski, the largest self-reported group is White at 98.2%. The next largest groups are Hispanic (0.9%) and Two or More Races (0.9%).
The bar chart below shows how Ruczynski 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 Ruczynski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White98.2% · 111
- Hispanic or Latino0.9% · 1
- Two or more races0.9% · 1
Timeline
Historical Census data for Ruczynski
Ruczynski 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
#133,863
National surname rank
Recorded bearers 126
+2 bearers (+1.6%)
Per 100,000 0.04
Rank movement Down 6,677 places
2020
#147,221
National surname rank
Recorded bearers 113
-13 bearers (-10.3%)
Per 100,000 0.04
Rank movement Down 13,358 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #127,186 | 124 | 0.05 | First available Census row | First available Census row |
| 2010 | #133,863 | 126 | 0.04 | +2 bearers (+1.6%) | Down 6,677 places |
| 2020 | #147,221 | 113 | 0.04 | -13 bearers (-10.3%) | Down 13,358 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 Ruczynski 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 | #133,863 | #147,221 | -10.0% |
| Count | 126 | 113 | -10.3% |
| Per 100K | 0.04 | 0.04 | -5.5% |
Between the 2010 and 2020 Census, the number of Ruczynski bearers went from 126 to 113 (-10.3% change). The surname moved down 13,358 positions in the national ranking, going from #133,863 to #147,221.
FAQ
Ruczynski surname: questions and answers
How many people in the U.S. have the surname Ruczynski?
Name Census estimates that about 130 living Americans carry the surname Ruczynski. Using the current population baseline, that works out to roughly 1 in 2,636,572 residents.
How common is Ruczynski?
Ruczynski ranks #147,221 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 113 people with the surname Ruczynski. That is different from the site's living-bearer estimate (130), 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 Ruczynski.
Has Ruczynski become more or less common over time?
Between 2010 and 2020, the surname Ruczynski went from 126 recorded bearers to 113. That is a decrease of 13 (-10.3%). In the national ranking it fell from #133,863 to #147,221.
What does the Census say about the background of Ruczynski?
Among Census respondents with the surname Ruczynski, the largest self-reported group is White at 98.2%. The next largest groups are Hispanic (0.9%) and Two or More Races (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 Ruczynski in the 2020 Census, accounting for 98.2% (111 people in the source table).
What is the full ancestry breakdown?
Ruczynski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (98.2%), Hispanic (0.9%), Two or More Races (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 Ruczynski (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 Ruczynski mean?
A Polish surname likely derived from a geographical location or place name. 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 Ruczynski (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 Ruczynski?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.