2000
#58,257
National surname rank
Recorded bearers 326
First available Census row
Per 100,000 0.12
Very Rare Last name
Sydor
A surname of Ukrainian origin, derived from the given name "Isidor" or "Isidore".
According to the 2020 US Census Bureau surname tables, roughly 407 Americans carry the last name Sydor. That puts it at #61,138 in the national surname ranking, appearing at a frequency of 0.12 per 100,000 people (about 1 in 842,148 residents).
This page is the full Name Census profile for the Sydor 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
407
1 in 842,148
Census rank
#61,138
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
355
very rare in the US
Popularity narrative
The Census Bureau recorded 355 bearers of the surname Sydor in its 2020 decennial surname file. At a rate of 0.12 per 100,000 residents, it holds the 61138th position in the national surname ranking.
Among Census respondents with the surname Sydor, the largest self-reported group is White at 94.6%. The next largest groups are Two or More Races (2.8%) and Hispanic (1.4%).
Origin
Meaning and origin of Sydor
The surname Sydor has its origins in Ukraine, with records dating back to the 16th century. It is believed to have derived from the Ukrainian word "sydora," which means "squint-eyed" or "cross-eyed." This suggests that the name may have been initially used as a descriptive nickname for someone with a distinctive eye condition.
In its early days, the name appeared in various spellings, such as Sydorov, Sydorenko, and Sydorovych, reflecting the influence of regional dialects and the fluid nature of surname formation. One of the earliest known references to the name can be found in a 1589 census record from the Kyiv region, where a certain Hryhoriy Sydor is listed as a landowner.
As the name spread across Ukraine, it became associated with several notable individuals throughout history. One such figure was Ivan Sydor, a Cossack leader who played a significant role in the Khmelnytsky Uprising against Polish rule in the mid-17th century. Another prominent bearer of the name was Hryhoriy Sydorenko, a respected writer and poet who lived in the late 18th and early 19th centuries.
In the realm of art and culture, the name Sydor has also left its mark. Mykhailo Sydorenko (1836-1904) was a renowned Ukrainian painter known for his depictions of rural life and landscapes. Likewise, Oleksandr Sydor (1858-1922) was a celebrated sculptor whose works adorned many public spaces in Kyiv and other cities.
Beyond Ukraine's borders, the name Sydor has also made its way into other regions. In the late 19th century, a wave of Ukrainian immigrants brought the surname to North America, where it took on various spellings, such as Sidor and Sidore, to adapt to the English language.
While the surname Sydor may not be as widely recognized as some others, its rich history and cultural significance in Ukraine have ensured its enduring presence throughout the centuries. From Cossack warriors to artists and writers, the name has been borne by individuals who have contributed to the tapestry of Ukrainian identity.
Demographics
Ancestry and ethnicity for Sydor
Among Census respondents with the surname Sydor, the largest self-reported group is White at 94.6%. The next largest groups are Two or More Races (2.8%) and Hispanic (1.4%).
The bar chart below shows how Sydor 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 Sydor surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.6% · 336
- Two or more races2.8% · 10
- Hispanic or Latino1.4% · 5
- Asian and Pacific Islander0.6% · 2
- Black or African American0.3% · 1
- American Indian and Alaska Native0.3% · 1
Timeline
Historical Census data for Sydor
Sydor 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
#62,189
National surname rank
Recorded bearers 322
-4 bearers (-1.2%)
Per 100,000 0.11
Rank movement Down 3,932 places
2020
#61,138
National surname rank
Recorded bearers 355
+33 bearers (+10.2%)
Per 100,000 0.12
Rank movement Up 1,051 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #58,257 | 326 | 0.12 | First available Census row | First available Census row |
| 2010 | #62,189 | 322 | 0.11 | -4 bearers (-1.2%) | Down 3,932 places |
| 2020 | #61,138 | 355 | 0.12 | +33 bearers (+10.2%) | Up 1,051 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 Sydor 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 | #62,189 | #61,138 | 1.7% |
| Count | 322 | 355 | 10.2% |
| Per 100K | 0.11 | 0.12 | 8.0% |
Between the 2010 and 2020 Census, the number of Sydor bearers went from 322 to 355 (+10.2% change). The surname moved up 1,051 positions in the national ranking, going from #62,189 to #61,138.
Notable bearers
Famous people with the surname Sydor
FAQ
Sydor surname: questions and answers
How many people in the U.S. have the surname Sydor?
Name Census estimates that about 407 living Americans carry the surname Sydor. Using the current population baseline, that works out to roughly 1 in 842,148 residents.
How common is Sydor?
Sydor ranks #61,138 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.12 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 355 people with the surname Sydor. That is different from the site's living-bearer estimate (407), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.12 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.12 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 Sydor.
Has Sydor become more or less common over time?
Between 2010 and 2020, the surname Sydor went from 322 recorded bearers to 355. That is an increase of 33 (+10.2%). In the national ranking it rose from #62,189 to #61,138.
What does the Census say about the background of Sydor?
Among Census respondents with the surname Sydor, the largest self-reported group is White at 94.6%. The next largest groups are Two or More Races (2.8%) and Hispanic (1.4%). 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 Sydor in the 2020 Census, accounting for 94.6% (336 people in the source table).
What is the full ancestry breakdown?
Sydor appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.6%), Two or More Races (2.8%), Hispanic (1.4%). 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 Sydor (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 Sydor mean?
A surname of Ukrainian origin, derived from the given name "Isidor" or "Isidore". 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 Sydor (0.12 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 Sydor?
Our sister site HowManyOfMe.org answers how many Americans have the surname Sydor at a glance, with the living-bearer count up front.