2000
#7,425
National surname rank
Recorded bearers 4,139
First available Census row
Per 100,000 1.53
Rare Last name
Rosenblum
Jewish ornamental surname referring to a florist or decorator, derived from the German words "rose" and "bloom."
According to the 2020 US Census Bureau surname tables, roughly 4,625 Americans carry the last name Rosenblum. That puts it at #7,894 in the national surname ranking, appearing at a frequency of 1.35 per 100,000 people (about 1 in 74,109 residents).
This page is the full Name Census profile for the Rosenblum 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
4.6K
1 in 74,109
Census rank
#7,894
2020 decennial data
Per 100,000
1.3
Frequency rate
Recorded bearers
4.0K
rare in the US
Popularity narrative
The Census Bureau recorded 4,033 bearers of the surname Rosenblum in its 2020 decennial surname file. At a rate of 1.35 per 100,000 residents, it holds the 7894th position in the national surname ranking.
Among Census respondents with the surname Rosenblum, the largest self-reported group is White at 94.6%. The next largest groups are Hispanic (2.8%) and Two or More Races (1.4%).
Origin
Meaning and origin of Rosenblum
The surname Rosenblum originated in Germany, likely in the 16th or 17th century. It is a compound word formed from the German words "rose" and "blume," meaning "rose flower." The name may have been initially used as a descriptive surname to identify someone who lived near a rose garden or who had a particular association with roses.
One of the earliest recorded instances of the surname Rosenblum can be found in church records from the town of Esslingen, located in the German state of Baden-Württemberg, dating back to the late 16th century. These records mention individuals with the surname spelled as "Rosenblum" or variations like "Rosenbluhm."
In the 17th and 18th centuries, the Rosenblum name appeared in various German regions, including Bavaria, Saxony, and Rhineland-Palatinate. During this period, the surname was sometimes spelled differently, such as "Rosenblüm" or "Rosenbluhm," reflecting regional variations in German dialects.
Notable individuals with the surname Rosenblum throughout history include:
1. Issachar Baer Rosenblum (1776-1853), a German-Jewish scholar and author known for his works on Talmudic literature.
2. Samuel Rosenblum (1802-1880), a Polish-born Jewish banker and philanthropist who lived in France.
3. Mayer Rosenblum (1860-1929), a German-born American businessman and real estate developer in New York City.
4. Samson Rosenblum (1889-1966), a Russian-born American rabbi and scholar who served as the president of the Central Conference of American Rabbis.
5. Morris Rosenblum (1901-1982), an American painter and printmaker known for his depictions of urban life in New York City.
While the Rosenblum surname has its roots in Germany, it has since spread to various parts of the world, particularly due to Jewish migration and diaspora communities. However, the origins of this name can be traced back to the German language and the symbolic association with roses.
Demographics
Ancestry and ethnicity for Rosenblum
Among Census respondents with the surname Rosenblum, the largest self-reported group is White at 94.6%. The next largest groups are Hispanic (2.8%) and Two or More Races (1.4%).
The bar chart below shows how Rosenblum 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 Rosenblum surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.6% · 3,815
- Hispanic or Latino2.8% · 114
- Two or more races1.4% · 56
- Asian and Pacific Islander0.9% · 37
- Black or African American0.2% · 8
- American Indian and Alaska Native0.1% · 3
Timeline
Historical Census data for Rosenblum
Rosenblum 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
#8,114
National surname rank
Recorded bearers 4,086
-53 bearers (-1.3%)
Per 100,000 1.39
Rank movement Down 689 places
2020
#7,894
National surname rank
Recorded bearers 4,033
-53 bearers (-1.3%)
Per 100,000 1.35
Rank movement Up 220 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #7,425 | 4,139 | 1.53 | First available Census row | First available Census row |
| 2010 | #8,114 | 4,086 | 1.39 | -53 bearers (-1.3%) | Down 689 places |
| 2020 | #7,894 | 4,033 | 1.35 | -53 bearers (-1.3%) | Up 220 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 Rosenblum 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 | #8,114 | #7,894 | 2.7% |
| Count | 4,086 | 4,033 | -1.3% |
| Per 100K | 1.39 | 1.35 | -2.9% |
Between the 2010 and 2020 Census, the number of Rosenblum bearers went from 4,086 to 4,033 (-1.3% change). The surname moved up 220 positions in the national ranking, going from #8,114 to #7,894.
FAQ
Rosenblum surname: questions and answers
How many people in the U.S. have the surname Rosenblum?
Name Census estimates that about 4,625 living Americans carry the surname Rosenblum. Using the current population baseline, that works out to roughly 1 in 74,109 residents.
How common is Rosenblum?
Rosenblum ranks #7,894 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 1.35 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 4,033 people with the surname Rosenblum. That is different from the site's living-bearer estimate (4,625), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 1.35 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 1.35 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 Rosenblum.
Has Rosenblum become more or less common over time?
Between 2010 and 2020, the surname Rosenblum went from 4,086 recorded bearers to 4,033. That is a decrease of 53 (-1.3%). In the national ranking it rose from #8,114 to #7,894.
What does the Census say about the background of Rosenblum?
Among Census respondents with the surname Rosenblum, the largest self-reported group is White at 94.6%. The next largest groups are Hispanic (2.8%) and Two or More Races (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 Rosenblum in the 2020 Census, accounting for 94.6% (3,815 people in the source table).
What is the full ancestry breakdown?
Rosenblum appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.6%), Hispanic (2.8%), Two or More Races (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 Rosenblum (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 Rosenblum mean?
Jewish ornamental surname referring to a florist or decorator, derived from the German words "rose" and "bloom." 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 Rosenblum (1.35 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 common is the surname Rosenblum?
If you just want to know how common the surname Rosenblum is, HowManyOfMe.org gives you the headline number in one glance.