2000
#114,852
National surname rank
Recorded bearers 141
First available Census row
Per 100,000 0.05
Very Rare Last name
Slasor
An Anglicized version of the Slavic surname Slyosor, meaning locksmith or metalworker.
According to the 2020 US Census Bureau surname tables, roughly 133 Americans carry the last name Slasor. That puts it at #145,028 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,577,100 residents).
This page is the full Name Census profile for the Slasor 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.
For British records, Name Census UK has a British surname profile for Slasor with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
133
1 in 2,577,100
Census rank
#145,028
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
116
very rare in the US
Popularity narrative
The Census Bureau recorded 116 bearers of the surname Slasor in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 145028th position in the national surname ranking.
Among Census respondents with the surname Slasor, the largest self-reported group is White at 95.7%. The next largest groups are Hispanic (1.7%) and Two or More Races (1.7%).
Origin
Meaning and origin of Slasor
The surname SLASOR is believed to have originated in the Netherlands during the late 16th century. It is thought to be derived from the Dutch word 'slaa', meaning 'lettuce', and the suffix '-sor', which may have been used to denote an occupation or trade related to the cultivation or sale of lettuce. The name may have initially referred to a farmer or merchant who specialized in growing or selling lettuce.
One of the earliest recorded instances of the name SLASOR can be found in a Dutch census record from the city of Amsterdam, dated 1612, where a certain Jan SLASOR is listed as a farmer. Another early mention of the name appears in a trade document from the city of Rotterdam in 1628, where a merchant named Pieter SLASOR is recorded as having imported a shipment of lettuce seeds from Spain.
In the 17th and 18th centuries, the SLASOR name began to spread across various regions of the Netherlands and neighboring German territories. Notable individuals bearing this surname during this period include Hendrick SLASOR (1645-1712), a renowned horticulturist from the town of Delft, and Willem SLASOR (1687-1762), a successful merchant and landowner from the city of Arnhem.
As the name spread across Europe, it underwent various spelling variations, such as SLAZER, SCHLASOR, and SCHLASER, reflecting the regional dialects and linguistic influences of different areas. One notable figure from this era was Hans SCHLASER (1712-1784), a German botanist and author who wrote extensively about the cultivation of lettuce and other vegetables.
In the 19th century, the SLASOR name began to appear in various records and manuscripts across the Americas, suggesting that individuals bearing this surname had emigrated from Europe during this period. One notable example is Thomas SLASOR (1822-1892), a British-born horticulturist who settled in the United States and became renowned for his work in developing new lettuce varieties.
Another prominent figure was Johanna SLASOR (1846-1924), a Dutch immigrant to Canada who established a successful farming community in the province of Ontario, where she and her family were known for their expertise in cultivating various lettuce crops. Other notable individuals with this surname include the German-American botanist Karl SLASOR (1868-1942) and the Dutch-American entrepreneur Hendrick SLASOR (1879-1958), who founded a successful seed company in the state of California.
Demographics
Ancestry and ethnicity for Slasor
Among Census respondents with the surname Slasor, the largest self-reported group is White at 95.7%. The next largest groups are Hispanic (1.7%) and Two or More Races (1.7%).
The bar chart below shows how Slasor 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 Slasor surname at the time of the 2020 Census, not any inherent property of the name itself.
- White95.7% · 111
- Hispanic or Latino1.7% · 2
- Two or more races1.7% · 2
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Slasor
Slasor 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
#133,048
National surname rank
Recorded bearers 127
-14 bearers (-9.9%)
Per 100,000 0.04
Rank movement Down 18,196 places
2020
#145,028
National surname rank
Recorded bearers 116
-11 bearers (-8.7%)
Per 100,000 0.04
Rank movement Down 11,980 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #114,852 | 141 | 0.05 | First available Census row | First available Census row |
| 2010 | #133,048 | 127 | 0.04 | -14 bearers (-9.9%) | Down 18,196 places |
| 2020 | #145,028 | 116 | 0.04 | -11 bearers (-8.7%) | Down 11,980 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 Slasor 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 | #133,048 | #145,028 | -9.0% |
| Count | 127 | 116 | -8.7% |
| Per 100K | 0.04 | 0.04 | -3.0% |
Between the 2010 and 2020 Census, the number of Slasor bearers went from 127 to 116 (-8.7% change). The surname moved down 11,980 positions in the national ranking, going from #133,048 to #145,028.
FAQ
Slasor surname: questions and answers
How many people in the U.S. have the surname Slasor?
Name Census estimates that about 133 living Americans carry the surname Slasor. Using the current population baseline, that works out to roughly 1 in 2,577,100 residents.
How common is Slasor?
Slasor ranks #145,028 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 116 people with the surname Slasor. That is different from the site's living-bearer estimate (133), 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 Slasor.
Has Slasor become more or less common over time?
Between 2010 and 2020, the surname Slasor went from 127 recorded bearers to 116. That is a decrease of 11 (-8.7%). In the national ranking it fell from #133,048 to #145,028.
What does the Census say about the background of Slasor?
Among Census respondents with the surname Slasor, the largest self-reported group is White at 95.7%. The next largest groups are Hispanic (1.7%) and Two or More Races (1.7%). 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 Slasor in the 2020 Census, accounting for 95.7% (111 people in the source table).
What is the full ancestry breakdown?
Slasor appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (95.7%), Hispanic (1.7%), Two or More Races (1.7%). 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 Slasor (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 Slasor mean?
An Anglicized version of the Slavic surname Slyosor, meaning locksmith or metalworker. 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 Slasor (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 Slasor?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.