2010
#151,532
National surname rank
Recorded bearers 108
First available Census row
Per 100,000 0.04
Very Rare Last name
Kahrhoff
A locational surname derived from a German place name.
According to the 2020 US Census Bureau surname tables, roughly 126 Americans carry the last name Kahrhoff. That puts it at #149,446 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,720,273 residents).
This page is the full Name Census profile for the Kahrhoff 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
126
1 in 2,720,273
Census rank
#149,446
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
110
very rare in the US
Popularity narrative
The Census Bureau recorded 110 bearers of the surname Kahrhoff in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 149446th position in the national surname ranking.
Among Census respondents with the surname Kahrhoff, the largest self-reported group is White at 96.4%. The next largest groups are Black (0.9%) and Hispanic (0.9%).
Origin
Meaning and origin of Kahrhoff
The surname Kahrhoff is believed to have originated in Germany, specifically in the region of Lower Saxony, during the Middle Ages. It is derived from the Old German words "kahr," meaning "cart," and "hoff," meaning "courtyard" or "farm." The name likely referred to someone who lived or worked on a farm or courtyard where carts were kept or maintained.
One of the earliest recorded mentions of the Kahrhoff surname can be found in a document from the city of Hanover, dated 1387. The document refers to a person named Johann Kahrhoff, who was a landowner and farmer in the area.
In the 16th century, there are records of a family with the surname Kahrhoff residing in the town of Celle, Lower Saxony. One notable member of this family was Hans Kahrhoff (1524-1591), a respected merchant and city councilor.
The Kahrhoff name also appears in historical records from other parts of Germany, such as the Rhineland and Bavaria, suggesting that the name spread to different regions over time. One notable individual with this surname was Friedrich Kahrhoff (1785-1864), a Prussian military officer who fought in the Napoleonic Wars.
In the 19th century, several members of the Kahrhoff family emigrated from Germany to other parts of the world, including the United States and Australia. One such individual was Wilhelm Kahrhoff (1821-1897), who settled in Wisconsin and became a successful farmer and landowner.
Another notable figure with the Kahrhoff surname was Karl Kahrhoff (1856-1932), a German-born architect who designed several prominent buildings in Chicago, including the Uptown Theater and the Edgewater Beach Hotel.
Throughout its history, the Kahrhoff surname has been spelled in various ways, including Karhoff, Kaarhoff, and Karrhoff, reflecting regional variations and changes in spelling over time.
Demographics
Ancestry and ethnicity for Kahrhoff
Among Census respondents with the surname Kahrhoff, the largest self-reported group is White at 96.4%. The next largest groups are Black (0.9%) and Hispanic (0.9%).
The bar chart below shows how Kahrhoff 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 Kahrhoff surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.4% · 106
- Black or African American0.9% · 1
- Hispanic or Latino0.9% · 1
- Asian and Pacific Islander0.9% · 1
- Two or more races0.9% · 1
Timeline
Historical Census data for Kahrhoff
Kahrhoff appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#149,446
National surname rank
Recorded bearers 110
+2 bearers (+1.9%)
Per 100,000 0.04
Rank movement Up 2,086 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #151,532 | 108 | 0.04 | First available Census row | First available Census row |
| 2020 | #149,446 | 110 | 0.04 | +2 bearers (+1.9%) | Up 2,086 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 Kahrhoff 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 | #151,532 | #149,446 | 1.4% |
| Count | 108 | 110 | 1.9% |
| Per 100K | 0.04 | 0.04 | -8.0% |
Between the 2010 and 2020 Census, the number of Kahrhoff bearers went from 108 to 110 (+1.9% change). The surname moved up 2,086 positions in the national ranking, going from #151,532 to #149,446.
FAQ
Kahrhoff surname: questions and answers
How many people in the U.S. have the surname Kahrhoff?
Name Census estimates that about 126 living Americans carry the surname Kahrhoff. Using the current population baseline, that works out to roughly 1 in 2,720,273 residents.
How common is Kahrhoff?
Kahrhoff ranks #149,446 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 110 people with the surname Kahrhoff. That is different from the site's living-bearer estimate (126), 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 Kahrhoff.
Has Kahrhoff become more or less common over time?
Between 2010 and 2020, the surname Kahrhoff went from 108 recorded bearers to 110. That is an increase of 2 (+1.9%). In the national ranking it rose from #151,532 to #149,446.
What does the Census say about the background of Kahrhoff?
Among Census respondents with the surname Kahrhoff, the largest self-reported group is White at 96.4%. The next largest groups are Black (0.9%) and Hispanic (0.9%). 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 Kahrhoff in the 2020 Census, accounting for 96.4% (106 people in the source table).
What is the full ancestry breakdown?
Kahrhoff appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.4%), Black (0.9%), Hispanic (0.9%). 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 Kahrhoff (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 Kahrhoff mean?
A locational surname derived from a German place name. 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 Kahrhoff (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 people have the last name Kahrhoff?
You can see how many Americans have the surname Kahrhoff on our sister site HowManyOfMe.org — same data roots, lighter UI.