2000
#127,948
National surname rank
Recorded bearers 123
First available Census row
Per 100,000 0.05
Very Rare Last name
Losack
A surname originating from a place name referring to an area in Yorkshire, England.
According to the 2020 US Census Bureau surname tables, roughly 136 Americans carry the last name Losack. That puts it at #142,788 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,520,252 residents).
This page is the full Name Census profile for the Losack 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
136
1 in 2,520,252
Census rank
#142,788
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
119
very rare in the US
Popularity narrative
The Census Bureau recorded 119 bearers of the surname Losack in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 142788th position in the national surname ranking.
Among Census respondents with the surname Losack, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (5.9%) and Two or More Races (1.7%).
Origin
Meaning and origin of Losack
The surname Losack has its origins in England, with records dating back to the 12th century. It is believed to have derived from the Old English words "los," meaning a meadow or pasture, and "ac," meaning an oak tree. This suggests that the name originally referred to someone who lived near an oak tree in a meadow or pasture.
One of the earliest recorded instances of the name can be found in the Pipe Rolls of Lincolnshire from 1199, where a person named Robert de Losak is mentioned. The spelling variations in those early days included Losak, Losac, and Loseac.
In the 13th century, the name appeared in the Hundred Rolls of Oxfordshire, where a landowner named Walter de Losacke was listed. This record provides evidence that the name was associated with landed gentry during that time period.
The Losack name can also be traced back to the village of Losacke in Nottinghamshire, which was mentioned in the Domesday Book of 1086. It is likely that some of the earliest bearers of the name hailed from this area.
One notable figure with the surname Losack was Sir William Losack, who was a prominent merchant and alderman in the City of London during the 16th century. He served as Lord Mayor of London in 1572 and was instrumental in the establishment of several charitable foundations.
Another noteworthy individual was John Losack (1592-1663), an English clergyman and scholar who served as the Archdeacon of Winchester. He authored several theological works and was considered a respected authority on ecclesiastical matters during his lifetime.
In the 18th century, Samuel Losack (1725-1805) was a renowned clockmaker and inventor from Yorkshire. He is credited with developing several innovations in the design and construction of longcase clocks, earning him a reputation as a skilled horologist.
The Losack name also has ties to the military, with Captain Thomas Losack (1787-1856) serving in the British Army during the Napoleonic Wars. He fought in several major battles, including the Battle of Waterloo in 1815, where he was commended for his bravery.
Finally, in the 19th century, Mary Losack (1841-1912) was a prominent suffragette and advocate for women's rights in England. She was a founding member of several organizations dedicated to advancing the cause of women's suffrage and played a significant role in the movement.
Demographics
Ancestry and ethnicity for Losack
Among Census respondents with the surname Losack, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (5.9%) and Two or More Races (1.7%).
The bar chart below shows how Losack 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 Losack surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.6% · 109
- Hispanic or Latino5.9% · 7
- Two or more races1.7% · 2
- Asian and Pacific Islander0.8% · 1
Timeline
Historical Census data for Losack
Losack 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
#135,593
National surname rank
Recorded bearers 124
+1 bearers (+0.8%)
Per 100,000 0.04
Rank movement Down 7,645 places
2020
#142,788
National surname rank
Recorded bearers 119
-5 bearers (-4.0%)
Per 100,000 0.04
Rank movement Down 7,195 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #127,948 | 123 | 0.05 | First available Census row | First available Census row |
| 2010 | #135,593 | 124 | 0.04 | +1 bearers (+0.8%) | Down 7,645 places |
| 2020 | #142,788 | 119 | 0.04 | -5 bearers (-4.0%) | Down 7,195 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 Losack 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 | #135,593 | #142,788 | -5.3% |
| Count | 124 | 119 | -4.0% |
| Per 100K | 0.04 | 0.04 | -0.5% |
Between the 2010 and 2020 Census, the number of Losack bearers went from 124 to 119 (-4.0% change). The surname moved down 7,195 positions in the national ranking, going from #135,593 to #142,788.
FAQ
Losack surname: questions and answers
How many people in the U.S. have the surname Losack?
Name Census estimates that about 136 living Americans carry the surname Losack. Using the current population baseline, that works out to roughly 1 in 2,520,252 residents.
How common is Losack?
Losack ranks #142,788 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 119 people with the surname Losack. That is different from the site's living-bearer estimate (136), 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 Losack.
Has Losack become more or less common over time?
Between 2010 and 2020, the surname Losack went from 124 recorded bearers to 119. That is a decrease of 5 (-4.0%). In the national ranking it fell from #135,593 to #142,788.
What does the Census say about the background of Losack?
Among Census respondents with the surname Losack, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (5.9%) 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 Losack in the 2020 Census, accounting for 91.6% (109 people in the source table).
What is the full ancestry breakdown?
Losack appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.6%), Hispanic (5.9%), 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 Losack (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 Losack mean?
A surname originating from a place name referring to an area in Yorkshire, 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 Losack (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 are called Losack?
Find out how many people have the last name Losack on our sister site HowManyOfMe.org — a quick modern estimate with the living-bearer count front and centre.