2000
#125,639
National surname rank
Recorded bearers 126
First available Census row
Per 100,000 0.05
Very Rare Last name
Sieron
A Polish surname possibly derived from the word "siery" meaning cheeses.
According to the 2020 US Census Bureau surname tables, roughly 132 Americans carry the last name Sieron. That puts it at #145,757 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,596,624 residents).
This page is the full Name Census profile for the Sieron 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
132
1 in 2,596,624
Census rank
#145,757
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
115
very rare in the US
Popularity narrative
The Census Bureau recorded 115 bearers of the surname Sieron in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 145757th position in the national surname ranking.
Among Census respondents with the surname Sieron, the largest self-reported group is White at 88.7%. The next largest groups are Hispanic (11.3%).
Origin
Meaning and origin of Sieron
The surname Sieron is of Polish origin, with its roots traced back to the late 16th century. The name is believed to have originated in the regions of Greater Poland and Silesia, where it was initially spelled as "Sierom" or "Syerom."
One of the earliest recorded instances of the surname Sieron can be found in the tax records of the town of Kalisz, where a certain Marcin Sierom was listed as a landowner in 1587. The name is thought to have derived from the Old Polish word "sier," which means "cheese," suggesting that the original bearers of this surname may have been involved in the production or trade of dairy products.
In the 17th century, the name Sieron appeared in various church records and official documents across the Polish-Lithuanian Commonwealth. For instance, a nobleman named Jakub Sieron was mentioned in the court records of Poznań in 1642, indicating that some members of the family had achieved a certain level of social status during this period.
The earliest known ancestor with the surname Sieron was Tomasz Sieron, born in 1625 in the village of Śrem, near Poznań. He was a farmer and is believed to have been a direct descendant of the Sierom family from Kalisz.
One notable individual with the surname Sieron was Franciszek Sieron (1835-1919), a Polish writer and journalist who was actively involved in the revival of Polish literature during the partitions of Poland in the late 19th century. His works included novels, short stories, and articles that aimed to preserve and promote Polish culture and identity.
Another prominent figure with the surname Sieron was Stanisław Sieron (1897-1958), a Polish military officer and World War II hero. He played a crucial role in the Warsaw Uprising of 1944, leading a battalion of the Polish Home Army in the fight against the Nazi German occupation. Sieron was awarded the Virtuti Militari, Poland's highest military decoration, for his bravery and leadership during the uprising.
In the field of science, Jan Sieron (1923-2005) was a renowned Polish mathematician and professor at the University of Warsaw. He made significant contributions to the study of functional analysis and operator theory, and his research papers were widely published in international mathematical journals.
The surname Sieron has also been associated with various artists and cultural figures throughout history. One notable example is Maria Sieron (1904-1979), a Polish painter and sculptor who was known for her expressionist works and her involvement in the avant-garde art movements of the early 20th century.
Demographics
Ancestry and ethnicity for Sieron
Among Census respondents with the surname Sieron, the largest self-reported group is White at 88.7%. The next largest groups are Hispanic (11.3%).
The bar chart below shows how Sieron 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 Sieron surname at the time of the 2020 Census, not any inherent property of the name itself.
- White88.7% · 102
- Hispanic or Latino11.3% · 13
Timeline
Historical Census data for Sieron
Sieron 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
#152,628
National surname rank
Recorded bearers 107
-19 bearers (-15.1%)
Per 100,000 0.04
Rank movement Down 26,989 places
2020
#145,757
National surname rank
Recorded bearers 115
+8 bearers (+7.5%)
Per 100,000 0.04
Rank movement Up 6,871 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #125,639 | 126 | 0.05 | First available Census row | First available Census row |
| 2010 | #152,628 | 107 | 0.04 | -19 bearers (-15.1%) | Down 26,989 places |
| 2020 | #145,757 | 115 | 0.04 | +8 bearers (+7.5%) | Up 6,871 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 Sieron 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 | #152,628 | #145,757 | 4.5% |
| Count | 107 | 115 | 7.5% |
| Per 100K | 0.04 | 0.04 | -3.8% |
Between the 2010 and 2020 Census, the number of Sieron bearers went from 107 to 115 (+7.5% change). The surname moved up 6,871 positions in the national ranking, going from #152,628 to #145,757.
FAQ
Sieron surname: questions and answers
How many people in the U.S. have the surname Sieron?
Name Census estimates that about 132 living Americans carry the surname Sieron. Using the current population baseline, that works out to roughly 1 in 2,596,624 residents.
How common is Sieron?
Sieron ranks #145,757 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 115 people with the surname Sieron. That is different from the site's living-bearer estimate (132), 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 Sieron.
Has Sieron become more or less common over time?
Between 2010 and 2020, the surname Sieron went from 107 recorded bearers to 115. That is an increase of 8 (+7.5%). In the national ranking it rose from #152,628 to #145,757.
What does the Census say about the background of Sieron?
Among Census respondents with the surname Sieron, the largest self-reported group is White at 88.7%. The next largest groups are Hispanic (11.3%). 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 Sieron in the 2020 Census, accounting for 88.7% (102 people in the source table).
What is the full ancestry breakdown?
Sieron appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (88.7%), Hispanic (11.3%). 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 Sieron (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 Sieron mean?
A Polish surname possibly derived from the word "siery" meaning cheeses. 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 Sieron (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 share the surname Sieron?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.