2000
#49,767
National surname rank
Recorded bearers 396
First available Census row
Per 100,000 0.15
Very Rare Last name
Casdorph
A locational surname referring to someone from the village of Casdorph, England.
According to the 2020 US Census Bureau surname tables, roughly 447 Americans carry the last name Casdorph. That puts it at #56,551 in the national surname ranking, appearing at a frequency of 0.13 per 100,000 people (about 1 in 766,788 residents).
This page is the full Name Census profile for the Casdorph 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
447
1 in 766,788
Census rank
#56,551
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
390
very rare in the US
Popularity narrative
The Census Bureau recorded 390 bearers of the surname Casdorph in its 2020 decennial surname file. At a rate of 0.13 per 100,000 residents, it holds the 56551st position in the national surname ranking.
Among Census respondents with the surname Casdorph, the largest self-reported group is White at 93.6%. The next largest groups are Hispanic (3.3%) and Two or More Races (2.3%).
Origin
Meaning and origin of Casdorph
The surname Casdorph has its origins in Germany, dating back to the 16th century. It is believed to have originated from the German word "Gasse," meaning "alley" or "lane," combined with "dorf," which translates to "village." This suggests that the name may have derived from a particular village or settlement with a notable alley or lane.
In the early records, the name appeared in various spellings, such as Gassdorf, Gaßdorff, and Gassdorph, reflecting the regional variations in pronunciation and spelling conventions of the time. One of the earliest known references to the name can be found in the church records of the town of Wittenberg, where a certain Hans Gassdorff was mentioned in 1547.
The Casdorph name gained prominence in the 18th century, with several notable individuals bearing the surname. Johann Wilhelm Casdorph (1720-1792) was a German theologian and author, known for his work on the history of the Reformation. Another notable figure was Friedrich Casdorph (1765-1838), a Prussian military officer who served under Frederick the Great during the Napoleonic Wars.
As the German population began to migrate to other parts of Europe and the Americas in the 19th century, the Casdorph name spread to various regions. In the United States, one of the earliest recorded instances of the name was that of Johann Casdorph, who settled in Pennsylvania in 1738.
Among the notable individuals with the Casdorph surname in more recent history are:
1. Wilhelm Casdorph (1876-1945), a German architect known for his work on various public buildings in Berlin.
2. Hans Casdorph (1901-1976), a German-American artist and illustrator known for his work in children's books.
3. Gertrude Casdorph (1905-1988), an American businesswoman and philanthropist, who founded the Casdorph Foundation.
4. Erich Casdorph (1918-2004), a German-American engineer who worked on the development of the Saturn V rocket for NASA.
5. Katharina Casdorph (born 1965), a German author and journalist, known for her works on contemporary German literature.
While the Casdorph name may have originated from a specific location or village in Germany, it has since spread across the globe, with individuals bearing this surname making their mark in various fields, from literature and art to science and engineering.
Demographics
Ancestry and ethnicity for Casdorph
Among Census respondents with the surname Casdorph, the largest self-reported group is White at 93.6%. The next largest groups are Hispanic (3.3%) and Two or More Races (2.3%).
The bar chart below shows how Casdorph 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 Casdorph surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.6% · 365
- Hispanic or Latino3.3% · 13
- Two or more races2.3% · 9
- Black or African American0.5% · 2
- Asian and Pacific Islander0.3% · 1
Timeline
Historical Census data for Casdorph
Casdorph 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
#49,268
National surname rank
Recorded bearers 427
+31 bearers (+7.8%)
Per 100,000 0.14
Rank movement Up 499 places
2020
#56,551
National surname rank
Recorded bearers 390
-37 bearers (-8.7%)
Per 100,000 0.13
Rank movement Down 7,283 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #49,767 | 396 | 0.15 | First available Census row | First available Census row |
| 2010 | #49,268 | 427 | 0.14 | +31 bearers (+7.8%) | Up 499 places |
| 2020 | #56,551 | 390 | 0.13 | -37 bearers (-8.7%) | Down 7,283 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 Casdorph 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 | #49,268 | #56,551 | -14.8% |
| Count | 427 | 390 | -8.7% |
| Per 100K | 0.14 | 0.13 | -6.8% |
Between the 2010 and 2020 Census, the number of Casdorph bearers went from 427 to 390 (-8.7% change). The surname moved down 7,283 positions in the national ranking, going from #49,268 to #56,551.
FAQ
Casdorph surname: questions and answers
How many people in the U.S. have the surname Casdorph?
Name Census estimates that about 447 living Americans carry the surname Casdorph. Using the current population baseline, that works out to roughly 1 in 766,788 residents.
How common is Casdorph?
Casdorph ranks #56,551 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.13 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 390 people with the surname Casdorph. That is different from the site's living-bearer estimate (447), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.13 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.13 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 Casdorph.
Has Casdorph become more or less common over time?
Between 2010 and 2020, the surname Casdorph went from 427 recorded bearers to 390. That is a decrease of 37 (-8.7%). In the national ranking it fell from #49,268 to #56,551.
What does the Census say about the background of Casdorph?
Among Census respondents with the surname Casdorph, the largest self-reported group is White at 93.6%. The next largest groups are Hispanic (3.3%) and Two or More Races (2.3%). 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 Casdorph in the 2020 Census, accounting for 93.6% (365 people in the source table).
What is the full ancestry breakdown?
Casdorph appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.6%), Hispanic (3.3%), Two or More Races (2.3%). 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 Casdorph (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 Casdorph mean?
A locational surname referring to someone from the village of Casdorph, England. 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 Casdorph (0.13 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 Casdorph?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.