2000
#8,124
National surname rank
Recorded bearers 3,759
First available Census row
Per 100,000 1.39
Rare Last name
Isenberg
A German toponymic surname referring to someone from a town or village called Isenberg or Eisenberg.
According to the 2020 US Census Bureau surname tables, roughly 4,035 Americans carry the last name Isenberg. That puts it at #8,926 in the national surname ranking, appearing at a frequency of 1.18 per 100,000 people (about 1 in 84,945 residents).
This page is the full Name Census profile for the Isenberg 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.
For British records, Name Census UK has a British surname profile for Isenberg with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
4.0K
1 in 84,945
Census rank
#8,926
2020 decennial data
Per 100,000
1.2
Frequency rate
Recorded bearers
3.5K
rare in the US
Popularity narrative
The Census Bureau recorded 3,519 bearers of the surname Isenberg in its 2020 decennial surname file. At a rate of 1.18 per 100,000 residents, it holds the 8926th position in the national surname ranking.
Among Census respondents with the surname Isenberg, the largest self-reported group is White at 93.8%. The next largest groups are Hispanic (2.7%) and Two or More Races (2.0%).
Origin
Meaning and origin of Isenberg
The surname Isenberg is of Germanic origin, specifically from the German and Yiddish languages. It is derived from the old German words "isen" meaning iron and "berg" meaning mountain or hill, thus suggesting a connection to an iron mine or ironworks located on a hill or mountain.
The name can be traced back to the 12th century, with early records showing variations in spelling such as Isenberg, Eisenberg, Eysenberg, and Isenberger. These different spellings were common due to the lack of standardized spelling systems in the past.
One of the earliest known references to the name Isenberg can be found in the Codex Diplomaticus Anhaltinus, a collection of historical documents from the region of Anhalt in modern-day Germany, dating back to the 13th century. This suggests that the name may have originated in or around the Anhalt region.
In the 14th century, the Isenberg family was mentioned in records from the town of Isenburg, located in the Rhineland region of Germany. It is likely that this place name is related to the surname, although the exact connection is unclear.
Notable individuals with the surname Isenberg throughout history include:
1. Johann Philipp von Isenberg (1655-1718), a German nobleman and military commander who served as the Governor of Luxembourg.
2. Johann Andreas Isenberg (1681-1759), a German botanist and explorer who traveled to India and Sri Lanka, documenting numerous plant species.
3. Charles Isenberg (1819-1888), a German-American businessman and philanthropist who co-founded the city of Corvallis, Oregon.
4. Sara Isenberg (1867-1948), an American educator and social worker who founded the Hebrew Technical Institute in New York City.
5. Rudolf Isenberg (1887-1956), a German politician and member of the Nazi Party who served as the Gauleiter of Styria during World War II.
These examples illustrate the diverse backgrounds and accomplishments of individuals bearing the surname Isenberg, spanning multiple centuries and regions.
Demographics
Ancestry and ethnicity for Isenberg
Among Census respondents with the surname Isenberg, the largest self-reported group is White at 93.8%. The next largest groups are Hispanic (2.7%) and Two or More Races (2.0%).
The bar chart below shows how Isenberg 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 Isenberg surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.8% · 3,302
- Hispanic or Latino2.7% · 95
- Two or more races2.0% · 72
- Asian and Pacific Islander1.0% · 36
- American Indian and Alaska Native0.3% · 9
- Black or African American0.1% · 5
Timeline
Historical Census data for Isenberg
Isenberg 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
#8,669
National surname rank
Recorded bearers 3,790
+31 bearers (+0.8%)
Per 100,000 1.28
Rank movement Down 545 places
2020
#8,926
National surname rank
Recorded bearers 3,519
-271 bearers (-7.2%)
Per 100,000 1.18
Rank movement Down 257 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #8,124 | 3,759 | 1.39 | First available Census row | First available Census row |
| 2010 | #8,669 | 3,790 | 1.28 | +31 bearers (+0.8%) | Down 545 places |
| 2020 | #8,926 | 3,519 | 1.18 | -271 bearers (-7.2%) | Down 257 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 Isenberg 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 | #8,669 | #8,926 | -3.0% |
| Count | 3,790 | 3,519 | -7.2% |
| Per 100K | 1.28 | 1.18 | -8.0% |
Between the 2010 and 2020 Census, the number of Isenberg bearers went from 3,790 to 3,519 (-7.2% change). The surname moved down 257 positions in the national ranking, going from #8,669 to #8,926.
FAQ
Isenberg surname: questions and answers
How many people in the U.S. have the surname Isenberg?
Name Census estimates that about 4,035 living Americans carry the surname Isenberg. Using the current population baseline, that works out to roughly 1 in 84,945 residents.
How common is Isenberg?
Isenberg ranks #8,926 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 1.18 per 100,000 residents, which is about 1 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 3,519 people with the surname Isenberg. That is different from the site's living-bearer estimate (4,035), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 1.18 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 1.18 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 1 of them to have the surname Isenberg.
Has Isenberg become more or less common over time?
Between 2010 and 2020, the surname Isenberg went from 3,790 recorded bearers to 3,519. That is a decrease of 271 (-7.2%). In the national ranking it fell from #8,669 to #8,926.
What does the Census say about the background of Isenberg?
Among Census respondents with the surname Isenberg, the largest self-reported group is White at 93.8%. The next largest groups are Hispanic (2.7%) and Two or More Races (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 Isenberg in the 2020 Census, accounting for 93.8% (3,302 people in the source table).
What is the full ancestry breakdown?
Isenberg appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.8%), Hispanic (2.7%), Two or More Races (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 Isenberg (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 Isenberg mean?
A German toponymic surname referring to someone from a town or village called Isenberg or Eisenberg. 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 Isenberg (1.18 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 Isenberg?
You can see how many Americans have the surname Isenberg on our sister site HowManyOfMe.org — same data roots, lighter UI.