2000
#146,011
National surname rank
Recorded bearers 104
First available Census row
Per 100,000 0.04
Very Rare Last name
Dielmann
A German surname derived from the word "Diele" meaning plank or board, potentially referring to a carpenter or woodworker.
According to the 2020 US Census Bureau surname tables, roughly 125 Americans carry the last name Dielmann. That puts it at #150,205 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,742,035 residents).
This page is the full Name Census profile for the Dielmann 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
125
1 in 2,742,035
Census rank
#150,205
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
109
very rare in the US
Popularity narrative
The Census Bureau recorded 109 bearers of the surname Dielmann in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 150205th position in the national surname ranking.
Among Census respondents with the surname Dielmann, the largest self-reported group is White at 89.9%. The next largest groups are Hispanic (7.3%) and Two or More Races (2.8%).
Origin
Meaning and origin of Dielmann
The surname Dielmann has its origins in Germany, dating back to the late Middle Ages. It is believed to have derived from the German word "Diele," which referred to a type of wooden floor or room in old Germanic houses. The name likely originated as a descriptive term for someone who lived near or worked on such a floor or room.
One of the earliest recorded instances of the name Dielmann can be found in the town records of Wolfenbüttel, Lower Saxony, from the year 1489, where a certain Hans Dielmann is mentioned as a local resident. This suggests that the name was already established in northern Germany by the late 15th century.
During the 16th and 17th centuries, the Dielmann name appears to have spread across various regions of Germany, with records showing individuals bearing this surname in cities like Cologne, Frankfurt, and Leipzig. One noteworthy example is the scholar and writer Johann Dielmann, born in Zwickau in 1593, who authored several works on theology and philosophy.
In the 18th century, the name Dielmann gained prominence in the Prussian region, particularly in the cities of Berlin and Brandenburg. A famous bearer of this surname was Friedrich Dielmann, a Prussian military officer who served during the Napoleonic Wars and was awarded the prestigious Pour le Mérite order in 1813.
As German migration to other parts of Europe and the Americas increased in the 19th century, the Dielmann name began to appear in various places worldwide. One such example is the Austrian-American composer and conductor Max Dielmann, who was born in Vienna in 1874 and later emigrated to the United States, where he conducted orchestras in various cities.
Another notable figure with the Dielmann surname was the German-American botanist and horticulturist Hermann Dielmann, born in Mannheim in 1855. He contributed significantly to the study of cacti and succulents and was instrumental in introducing many new species to cultivation.
While the Dielmann name has its roots in Germany, it has since spread to various parts of the world, with individuals bearing this surname making significant contributions in fields such as academia, military, and the arts.
Demographics
Ancestry and ethnicity for Dielmann
Among Census respondents with the surname Dielmann, the largest self-reported group is White at 89.9%. The next largest groups are Hispanic (7.3%) and Two or More Races (2.8%).
The bar chart below shows how Dielmann 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 Dielmann surname at the time of the 2020 Census, not any inherent property of the name itself.
- White89.9% · 98
- Hispanic or Latino7.3% · 8
- Two or more races2.8% · 3
Timeline
Historical Census data for Dielmann
Dielmann 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
#143,149
National surname rank
Recorded bearers 116
+12 bearers (+11.5%)
Per 100,000 0.04
Rank movement Up 2,862 places
2020
#150,205
National surname rank
Recorded bearers 109
-7 bearers (-6.0%)
Per 100,000 0.04
Rank movement Down 7,056 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #146,011 | 104 | 0.04 | First available Census row | First available Census row |
| 2010 | #143,149 | 116 | 0.04 | +12 bearers (+11.5%) | Up 2,862 places |
| 2020 | #150,205 | 109 | 0.04 | -7 bearers (-6.0%) | Down 7,056 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 Dielmann 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 | #143,149 | #150,205 | -4.9% |
| Count | 116 | 109 | -6.0% |
| Per 100K | 0.04 | 0.04 | -8.8% |
Between the 2010 and 2020 Census, the number of Dielmann bearers went from 116 to 109 (-6.0% change). The surname moved down 7,056 positions in the national ranking, going from #143,149 to #150,205.
FAQ
Dielmann surname: questions and answers
How many people in the U.S. have the surname Dielmann?
Name Census estimates that about 125 living Americans carry the surname Dielmann. Using the current population baseline, that works out to roughly 1 in 2,742,035 residents.
How common is Dielmann?
Dielmann ranks #150,205 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 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 109 people with the surname Dielmann. That is different from the site's living-bearer estimate (125), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 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 Dielmann.
Has Dielmann become more or less common over time?
Between 2010 and 2020, the surname Dielmann went from 116 recorded bearers to 109. That is a decrease of 7 (-6.0%). In the national ranking it fell from #143,149 to #150,205.
What does the Census say about the background of Dielmann?
Among Census respondents with the surname Dielmann, the largest self-reported group is White at 89.9%. The next largest groups are Hispanic (7.3%) and Two or More Races (2.8%). 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 Dielmann in the 2020 Census, accounting for 89.9% (98 people in the source table).
What is the full ancestry breakdown?
Dielmann appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (89.9%), Hispanic (7.3%), Two or More Races (2.8%). 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 Dielmann (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 Dielmann mean?
A German surname derived from the word "Diele" meaning plank or board, potentially referring to a carpenter or woodworker. 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 Dielmann (0.04 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 Americans have the surname Dielmann?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.