2000
#124,872
National surname rank
Recorded bearers 127
First available Census row
Per 100,000 0.05
Very Rare Last name
Dalldorf
A locational surname likely originating from a place name with the German "dorf" element meaning "village".
According to the 2020 US Census Bureau surname tables, roughly 125 Americans carry the last name Dalldorf. 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 Dalldorf 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 Dalldorf 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 Dalldorf, the largest self-reported group is White at 87.2%. The next largest groups are Two or More Races (8.3%) and Hispanic (1.8%).
Origin
Meaning and origin of Dalldorf
The surname Dalldorf originated in Germany and can be traced back to the 15th century. It is derived from the Old German words "dal" meaning valley and "dorf" meaning village, suggesting that the name likely referred to someone who lived in a village situated in a valley. The earliest recorded spelling of the name was "Daldorff" in 1492, found in the records of the town of Koblenz, located along the Rhine River.
One of the earliest known bearers of the name was Hans Daldorff, a merchant who lived in the city of Cologne in the late 15th century. Records indicate that he engaged in the lucrative wool trade and owned several properties in the city. Another early record of the name can be found in the "Steuerbuch" (tax records) of the town of Mainz from 1512, which lists a Johann Daldorff as a landowner.
In the 17th century, the Dalldorf name appears in several historical documents related to the Thirty Years' War (1618-1648). A notable figure from this period was Caspar Dalldorf, a soldier who fought in the army of the Protestant Swedish king, Gustavus Adolphus. He was born in 1605 in the town of Wittenberg and was said to have been present at the decisive Battle of Lützen in 1632.
The 18th century saw the emergence of several prominent individuals with the Dalldorf surname. One was Johann Friedrich Dalldorf (1734-1809), a theologian and author who served as a pastor in the town of Elsdorf in the Rhineland region. He wrote several books on religious topics and was known for his eloquent sermons.
Another notable figure was Carl Dalldorf (1784-1859), a German architect who worked in the Neoclassical style. He was responsible for designing several important buildings in Berlin, including the Neue Wache (New Guardhouse) and the Friedrichswerder Church. His son, Gustav Dalldorf (1823-1891), followed in his footsteps and became a respected architect in his own right, responsible for the design of the Reichstag building in Berlin.
Throughout history, variations of the spelling of the name have included Daldorf, Dallendorf, and Dalldorff. While the name was most prevalent in Germany, it also spread to other parts of Europe and eventually to other parts of the world through migration.
Demographics
Ancestry and ethnicity for Dalldorf
Among Census respondents with the surname Dalldorf, the largest self-reported group is White at 87.2%. The next largest groups are Two or More Races (8.3%) and Hispanic (1.8%).
The bar chart below shows how Dalldorf 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 Dalldorf surname at the time of the 2020 Census, not any inherent property of the name itself.
- White87.2% · 95
- Two or more races8.3% · 9
- Hispanic or Latino1.8% · 2
- Asian and Pacific Islander1.8% · 2
- Black or African American0.9% · 1
Timeline
Historical Census data for Dalldorf
Dalldorf 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
#138,304
National surname rank
Recorded bearers 121
-6 bearers (-4.7%)
Per 100,000 0.04
Rank movement Down 13,432 places
2020
#150,205
National surname rank
Recorded bearers 109
-12 bearers (-9.9%)
Per 100,000 0.04
Rank movement Down 11,901 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #124,872 | 127 | 0.05 | First available Census row | First available Census row |
| 2010 | #138,304 | 121 | 0.04 | -6 bearers (-4.7%) | Down 13,432 places |
| 2020 | #150,205 | 109 | 0.04 | -12 bearers (-9.9%) | Down 11,901 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 Dalldorf 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 | #138,304 | #150,205 | -8.6% |
| Count | 121 | 109 | -9.9% |
| Per 100K | 0.04 | 0.04 | -8.8% |
Between the 2010 and 2020 Census, the number of Dalldorf bearers went from 121 to 109 (-9.9% change). The surname moved down 11,901 positions in the national ranking, going from #138,304 to #150,205.
FAQ
Dalldorf surname: questions and answers
How many people in the U.S. have the surname Dalldorf?
Name Census estimates that about 125 living Americans carry the surname Dalldorf. Using the current population baseline, that works out to roughly 1 in 2,742,035 residents.
How common is Dalldorf?
Dalldorf 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 Dalldorf. 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 Dalldorf.
Has Dalldorf become more or less common over time?
Between 2010 and 2020, the surname Dalldorf went from 121 recorded bearers to 109. That is a decrease of 12 (-9.9%). In the national ranking it fell from #138,304 to #150,205.
What does the Census say about the background of Dalldorf?
Among Census respondents with the surname Dalldorf, the largest self-reported group is White at 87.2%. The next largest groups are Two or More Races (8.3%) and Hispanic (1.8%). 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 Dalldorf in the 2020 Census, accounting for 87.2% (95 people in the source table).
What is the full ancestry breakdown?
Dalldorf appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (87.2%), Two or More Races (8.3%), Hispanic (1.8%). 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 Dalldorf (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 Dalldorf mean?
A locational surname likely originating from a place name with the German "dorf" element meaning "village". 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 Dalldorf (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 Dalldorf?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.