2000
#33,333
National surname rank
Recorded bearers 646
First available Census row
Per 100,000 0.24
Very Rare Last name
Sideris
A Greek surname derived from the word "sideris" meaning iron or blacksmith.
According to the 2020 US Census Bureau surname tables, roughly 794 Americans carry the last name Sideris. That puts it at #35,096 in the national surname ranking, appearing at a frequency of 0.23 per 100,000 people (about 1 in 431,681 residents).
This page is the full Name Census profile for the Sideris 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
794
1 in 431,681
Census rank
#35,096
2020 decennial data
Per 100,000
0.2
Frequency rate
Recorded bearers
692
very rare in the US
Popularity narrative
The Census Bureau recorded 692 bearers of the surname Sideris in its 2020 decennial surname file. At a rate of 0.23 per 100,000 residents, it holds the 35096th position in the national surname ranking.
Among Census respondents with the surname Sideris, the largest self-reported group is White at 90.9%. The next largest groups are Hispanic (4.6%) and Two or More Races (2.2%).
Origin
Meaning and origin of Sideris
The surname Sideris originates from Greece and can be traced back to the 9th century AD. It is derived from the Greek word "sideros," which means iron or steel. The name likely originated from an ancestor who worked as a blacksmith or ironworker.
One of the earliest recorded instances of the surname Sideris can be found in a medieval Greek manuscript dated to the 11th century, which mentions a man named Georgios Sideris living in the region of Thessaly.
In the 14th century, a prominent family bearing the name Sideris resided in the city of Thessaloniki. They were known as skilled metalworkers and played a significant role in the city's economy.
During the Byzantine Empire, the name Sideris appeared in several official records and documents, indicating that bearers of this surname held various positions within the imperial administration and military.
Notable individuals with the surname Sideris throughout history include Ioannis Sideris (1801-1879), a Greek scholar and educator who played a crucial role in the Greek War of Independence. Another notable figure was Konstantinos Sideris (1856-1935), a renowned Greek painter and art teacher who helped establish the Academy of Fine Arts in Athens.
In the 20th century, Georgios Sideris (1922-2001) was a prominent Greek politician and diplomat who served as the Minister of Foreign Affairs from 1981 to 1985.
The name Sideris has also been associated with several place names in Greece, such as the village of Sideri in the region of Epirus and the island of Sideroussas in the Aegean Sea.
While the surname Sideris is most commonly found in Greece, it has also been adopted by Greek diaspora communities around the world, particularly in the United States, Australia, and parts of Europe.
Demographics
Ancestry and ethnicity for Sideris
Among Census respondents with the surname Sideris, the largest self-reported group is White at 90.9%. The next largest groups are Hispanic (4.6%) and Two or More Races (2.2%).
The bar chart below shows how Sideris 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 Sideris surname at the time of the 2020 Census, not any inherent property of the name itself.
- White90.9% · 629
- Hispanic or Latino4.6% · 32
- Two or more races2.2% · 15
- Asian and Pacific Islander1.3% · 9
- Black or African American0.9% · 6
- American Indian and Alaska Native0.1% · 1
Timeline
Historical Census data for Sideris
Sideris 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
#34,801
National surname rank
Recorded bearers 649
+3 bearers (+0.5%)
Per 100,000 0.22
Rank movement Down 1,468 places
2020
#35,096
National surname rank
Recorded bearers 692
+43 bearers (+6.6%)
Per 100,000 0.23
Rank movement Down 295 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #33,333 | 646 | 0.24 | First available Census row | First available Census row |
| 2010 | #34,801 | 649 | 0.22 | +3 bearers (+0.5%) | Down 1,468 places |
| 2020 | #35,096 | 692 | 0.23 | +43 bearers (+6.6%) | Down 295 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 Sideris 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 | #34,801 | #35,096 | -0.8% |
| Count | 649 | 692 | 6.6% |
| Per 100K | 0.22 | 0.23 | 5.2% |
Between the 2010 and 2020 Census, the number of Sideris bearers went from 649 to 692 (+6.6% change). The surname moved down 295 positions in the national ranking, going from #34,801 to #35,096.
FAQ
Sideris surname: questions and answers
How many people in the U.S. have the surname Sideris?
Name Census estimates that about 794 living Americans carry the surname Sideris. Using the current population baseline, that works out to roughly 1 in 431,681 residents.
How common is Sideris?
Sideris ranks #35,096 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.23 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 692 people with the surname Sideris. That is different from the site's living-bearer estimate (794), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.23 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.23 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 Sideris.
Has Sideris become more or less common over time?
Between 2010 and 2020, the surname Sideris went from 649 recorded bearers to 692. That is an increase of 43 (+6.6%). In the national ranking it fell from #34,801 to #35,096.
What does the Census say about the background of Sideris?
Among Census respondents with the surname Sideris, the largest self-reported group is White at 90.9%. The next largest groups are Hispanic (4.6%) and Two or More Races (2.2%). 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 Sideris in the 2020 Census, accounting for 90.9% (629 people in the source table).
What is the full ancestry breakdown?
Sideris appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (90.9%), Hispanic (4.6%), Two or More Races (2.2%). 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 Sideris (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 Sideris mean?
A Greek surname derived from the word "sideris" meaning iron or blacksmith. 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 Sideris (0.23 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 Sideris?
See how common the surname Sideris is on HowManyOfMe.org, our sister site built around that single question.