2010
#149,395
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Mohrhauser
A surname of German origin meaning "moor house" or "one who lives by a swamp".
According to the 2020 US Census Bureau surname tables, roughly 120 Americans carry the last name Mohrhauser. That puts it at #152,989 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,856,286 residents).
This page is the full Name Census profile for the Mohrhauser 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
120
1 in 2,856,286
Census rank
#152,989
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
105
very rare in the US
Popularity narrative
The Census Bureau recorded 105 bearers of the surname Mohrhauser in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 152989th position in the national surname ranking.
Among Census respondents with the surname Mohrhauser, the largest self-reported group is White at 89.5%. The next largest groups are Two or More Races (5.7%) and Asian/Pacific Islander (2.9%).
Origin
Meaning and origin of Mohrhauser
The surname Mohrhauser originated in Germany, with records dating back to the 16th century. It is a compound name, derived from the German words "Mohr" meaning "Moor" and "hauser" meaning "dweller" or "inhabitant." This suggests that the name may have originated as a descriptive surname for someone who lived near or in a moorland area.
One of the earliest recorded instances of the name Mohrhauser can be found in the church records of the town of Schwäbisch Gmünd, located in the state of Baden-Württemberg, Germany. In 1587, a man named Hans Mohrhauser is mentioned as a resident of the town.
In the 17th century, the name appears in various historical documents across southern Germany, particularly in the regions of Bavaria and Baden-Württemberg. One notable mention is in the records of the town of Memmingen, where a Johann Mohrhauser is listed as a merchant in 1634.
As the name spread across Germany, variations in spelling emerged, such as Mohrhauser, Mohrhaußer, and Mohrhäuser. These variations likely reflect regional dialects and differences in record-keeping practices.
One of the earliest known bearers of the name Mohrhauser was Johann Christoph Mohrhauser, born in 1694 in Schwäbisch Gmünd. He was a renowned theologian and author, known for his works on biblical exegesis and church history.
Another notable figure was Friedrich Mohrhauser, born in 1781 in Memmingen. He was a prominent jurist and legal scholar, serving as a judge and professor of law at the University of Heidelberg.
In the 19th century, the Mohrhauser name gained recognition through the works of Karl Mohrhauser, a German artist and painter born in 1823 in Munich. His landscape paintings and portraiture were highly acclaimed during his lifetime.
The name Mohrhauser also appears in the genealogical records of the noble von Mohrhauser family, who trace their lineage back to the 16th century in the region of Franconia, Bavaria. One of the earliest recorded members of this family was Hans von Mohrhauser, born in 1562 in the town of Neustadt an der Aisch.
Despite its German origins, the name Mohrhauser has spread to other parts of the world through migration and diaspora. However, the majority of historical records and notable figures associated with this surname can be found in the southern regions of Germany, particularly in the states of Bavaria and Baden-Württemberg.
Demographics
Ancestry and ethnicity for Mohrhauser
Among Census respondents with the surname Mohrhauser, the largest self-reported group is White at 89.5%. The next largest groups are Two or More Races (5.7%) and Asian/Pacific Islander (2.9%).
The bar chart below shows how Mohrhauser 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 Mohrhauser surname at the time of the 2020 Census, not any inherent property of the name itself.
- White89.5% · 94
- Two or more races5.7% · 6
- Asian and Pacific Islander2.9% · 3
- Hispanic or Latino1.9% · 2
Timeline
Historical Census data for Mohrhauser
Mohrhauser 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
#152,989
National surname rank
Recorded bearers 105
-5 bearers (-4.5%)
Per 100,000 0.04
Rank movement Down 3,594 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #149,395 | 110 | 0.04 | First available Census row | First available Census row |
| 2020 | #152,989 | 105 | 0.04 | -5 bearers (-4.5%) | Down 3,594 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 Mohrhauser 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 | #149,395 | #152,989 | -2.4% |
| Count | 110 | 105 | -4.5% |
| Per 100K | 0.04 | 0.04 | -12.2% |
Between the 2010 and 2020 Census, the number of Mohrhauser bearers went from 110 to 105 (-4.5% change). The surname moved down 3,594 positions in the national ranking, going from #149,395 to #152,989.
FAQ
Mohrhauser surname: questions and answers
How many people in the U.S. have the surname Mohrhauser?
Name Census estimates that about 120 living Americans carry the surname Mohrhauser. Using the current population baseline, that works out to roughly 1 in 2,856,286 residents.
How common is Mohrhauser?
Mohrhauser ranks #152,989 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 105 people with the surname Mohrhauser. That is different from the site's living-bearer estimate (120), 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 Mohrhauser.
Has Mohrhauser become more or less common over time?
Between 2010 and 2020, the surname Mohrhauser went from 110 recorded bearers to 105. That is a decrease of 5 (-4.5%). In the national ranking it fell from #149,395 to #152,989.
What does the Census say about the background of Mohrhauser?
Among Census respondents with the surname Mohrhauser, the largest self-reported group is White at 89.5%. The next largest groups are Two or More Races (5.7%) and Asian/Pacific Islander (2.9%). 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 Mohrhauser in the 2020 Census, accounting for 89.5% (94 people in the source table).
What is the full ancestry breakdown?
Mohrhauser appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (89.5%), Two or More Races (5.7%), Asian/Pacific Islander (2.9%). 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 Mohrhauser (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 Mohrhauser mean?
A surname of German origin meaning "moor house" or "one who lives by a swamp". 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 Mohrhauser (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 Mohrhauser?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.