2010
#159,712
National surname rank
Recorded bearers 101
First available Census row
Per 100,000 0.03
Very Rare Last name
Haslauer
A locational surname originating from a place called Haslau or Haslauer.
According to the 2020 US Census Bureau surname tables, roughly 123 Americans carry the last name Haslauer. That puts it at #151,639 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,786,621 residents).
This page is the full Name Census profile for the Haslauer 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
123
1 in 2,786,621
Census rank
#151,639
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
107
very rare in the US
Popularity narrative
The Census Bureau recorded 107 bearers of the surname Haslauer in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 151639th position in the national surname ranking.
Among Census respondents with the surname Haslauer, the largest self-reported group is White at 94.4%. The next largest groups are Hispanic (5.6%).
Origin
Meaning and origin of Haslauer
The surname Haslauer originates from the German-speaking regions of Europe, particularly in Austria and Bavaria, Germany, dating back to the 13th century. It is derived from the Old High German word "hasal," meaning hazelnut, and the suffix "-au," which denotes a meadow or clearing. Therefore, the name Haslauer likely referred to someone who lived in or near a hazel grove or meadow.
The earliest known record of the name Haslauer can be found in the Codex Traditionum Monasterii Sancti Petri Salisburgensis, a 13th-century manuscript from the Benedictine monastery of St. Peter's in Salzburg, Austria. This document mentions a certain "Haslawer" who was a landowner in the region.
In the 14th century, the name Haslauer appeared in various historical records, such as the Stiftungsbuch des Klosters Raitenhaslach, a register of the Raitenhaslach monastery in Bavaria. This suggests that the name was well-established in both Austria and Bavaria during this period.
One of the earliest notable individuals with the surname Haslauer was Johannes Haslauer, a 15th-century Austrian priest and writer who authored several religious works, including a commentary on the Book of Psalms.
In the 16th century, the name Haslauer was associated with a prominent family of landowners and noblemen in the Salzburg region of Austria. One member of this family, Hans Haslauer (c. 1530-1605), served as the mayor of Salzburg and played a significant role in the city's political affairs.
Another notable figure was the 17th-century German composer and organist Kaspar Haslauer (1618-1677), who served as the court organist in Nuremberg and composed numerous works for organ and other instruments.
In the 19th century, a branch of the Haslauer family emigrated from Austria to the United States, where they settled in Pennsylvania. One descendant, John Haslauer (1824-1892), became a successful businessman and was involved in the development of the coal mining industry in the region.
Throughout history, the surname Haslauer has also been associated with various place names, such as Haslau in Lower Austria, Haslau in Bavaria, and Haslach in Baden-Württemberg, Germany, further reinforcing its connection to the hazel tree and meadows.
Demographics
Ancestry and ethnicity for Haslauer
Among Census respondents with the surname Haslauer, the largest self-reported group is White at 94.4%. The next largest groups are Hispanic (5.6%).
The bar chart below shows how Haslauer 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 Haslauer surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.4% · 101
- Hispanic or Latino5.6% · 6
Timeline
Historical Census data for Haslauer
Haslauer 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
#151,639
National surname rank
Recorded bearers 107
+6 bearers (+5.9%)
Per 100,000 0.04
Rank movement Up 8,073 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #159,712 | 101 | 0.03 | First available Census row | First available Census row |
| 2020 | #151,639 | 107 | 0.04 | +6 bearers (+5.9%) | Up 8,073 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 Haslauer 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 | #159,712 | #151,639 | 5.1% |
| Count | 101 | 107 | 5.9% |
| Per 100K | 0.03 | 0.04 | 19.3% |
Between the 2010 and 2020 Census, the number of Haslauer bearers went from 101 to 107 (+5.9% change). The surname moved up 8,073 positions in the national ranking, going from #159,712 to #151,639.
FAQ
Haslauer surname: questions and answers
How many people in the U.S. have the surname Haslauer?
Name Census estimates that about 123 living Americans carry the surname Haslauer. Using the current population baseline, that works out to roughly 1 in 2,786,621 residents.
How common is Haslauer?
Haslauer ranks #151,639 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 107 people with the surname Haslauer. That is different from the site's living-bearer estimate (123), 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 Haslauer.
Has Haslauer become more or less common over time?
Between 2010 and 2020, the surname Haslauer went from 101 recorded bearers to 107. That is an increase of 6 (+5.9%). In the national ranking it rose from #159,712 to #151,639.
What does the Census say about the background of Haslauer?
Among Census respondents with the surname Haslauer, the largest self-reported group is White at 94.4%. The next largest groups are Hispanic (5.6%). 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 Haslauer in the 2020 Census, accounting for 94.4% (101 people in the source table).
What is the full ancestry breakdown?
Haslauer appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.4%), Hispanic (5.6%). 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 Haslauer (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 Haslauer mean?
A locational surname originating from a place called Haslau or Haslauer. 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 Haslauer (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 common is the surname Haslauer?
Want to know how many Americans have the surname Haslauer? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.