2000
#135,837
National surname rank
Recorded bearers 114
First available Census row
Per 100,000 0.04
Very Rare Last name
Segro
A Latinized form of the German surname Seger, derived from the medieval personal name Segar meaning victory.
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Segro. That puts it at #155,270 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,954,779 residents).
This page is the full Name Census profile for the Segro 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
116
1 in 2,954,779
Census rank
#155,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
101
very rare in the US
Popularity narrative
The Census Bureau recorded 101 bearers of the surname Segro in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155270th position in the national surname ranking.
Among Census respondents with the surname Segro, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (4.0%) and Black (2.0%).
Origin
Meaning and origin of Segro
The surname Segro has its origins in Italy, with records dating back to the 15th century. It is believed to have originated from the Latin word "segreta," which means "secret" or "concealed." This suggests that the name may have been given to someone who lived in a secluded or hidden location.
In the early days, the name was primarily found in the regions of Piedmont and Lombardy in northern Italy. It is worth noting that the name may have been spelled differently in older records, such as "Segro," "Segra," or "Segrio."
One of the earliest known references to the name Segro can be found in a 16th-century manuscript from the town of Vercelli, which mentions a family with this surname. Additionally, there are records of a nobleman named Giovanni Segro, who lived in the early 17th century in the city of Milan.
The name Segro gained prominence in the 18th century, with several notable individuals bearing this surname. Francesco Segro (1712-1784) was a renowned Italian painter and architect from Turin, known for his contributions to the Baroque and Rococo styles. Another noteworthy figure was Antonio Segro (1758-1831), a philosopher and writer from Alessandria, who published several influential works on ethics and morality.
In the 19th century, the name Segro spread to other parts of Italy and even beyond. Giuseppe Segro (1822-1892) was a prominent politician and statesman from Sicily, who served as a member of the Italian Parliament. Maria Segro (1867-1932), on the other hand, was a celebrated opera singer from Naples, who performed on some of the most prestigious stages in Europe.
One of the most famous individuals with the surname Segro was Achille Segro (1887-1963), an Italian theoretical physicist and mathematician. He made significant contributions to the fields of electromagnetism and relativity, and his work heavily influenced the development of modern physics.
While the surname Segro has its roots in Italy, it has since spread to other parts of the world, including various European countries and the Americas. However, its historical origins and the notable figures associated with this name remain deeply rooted in the rich cultural heritage of Italy.
Demographics
Ancestry and ethnicity for Segro
Among Census respondents with the surname Segro, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (4.0%) and Black (2.0%).
The bar chart below shows how Segro 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 Segro surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.1% · 93
- Hispanic or Latino4.0% · 4
- Black or African American2.0% · 2
- Asian and Pacific Islander2.0% · 2
Timeline
Historical Census data for Segro
Segro 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
#146,201
National surname rank
Recorded bearers 113
-1 bearers (-0.9%)
Per 100,000 0.04
Rank movement Down 10,364 places
2020
#155,270
National surname rank
Recorded bearers 101
-12 bearers (-10.6%)
Per 100,000 0.03
Rank movement Down 9,069 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #135,837 | 114 | 0.04 | First available Census row | First available Census row |
| 2010 | #146,201 | 113 | 0.04 | -1 bearers (-0.9%) | Down 10,364 places |
| 2020 | #155,270 | 101 | 0.03 | -12 bearers (-10.6%) | Down 9,069 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 Segro 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 | #146,201 | #155,270 | -6.2% |
| Count | 113 | 101 | -10.6% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Segro bearers went from 113 to 101 (-10.6% change). The surname moved down 9,069 positions in the national ranking, going from #146,201 to #155,270.
FAQ
Segro surname: questions and answers
How many people in the U.S. have the surname Segro?
Name Census estimates that about 116 living Americans carry the surname Segro. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Segro?
Segro ranks #155,270 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 101 people with the surname Segro. That is different from the site's living-bearer estimate (116), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Segro.
Has Segro become more or less common over time?
Between 2010 and 2020, the surname Segro went from 113 recorded bearers to 101. That is a decrease of 12 (-10.6%). In the national ranking it fell from #146,201 to #155,270.
What does the Census say about the background of Segro?
Among Census respondents with the surname Segro, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (4.0%) and Black (2.0%). 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 Segro in the 2020 Census, accounting for 92.1% (93 people in the source table).
What is the full ancestry breakdown?
Segro appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.1%), Hispanic (4.0%), Black (2.0%). 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 Segro (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 Segro mean?
A Latinized form of the German surname Seger, derived from the medieval personal name Segar meaning victory. 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 Segro (0.03 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 Segro?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.