2000
#11,994
National surname rank
Recorded bearers 2,390
First available Census row
Per 100,000 0.89
Rare Last name
Larock
French toponymic surname derived from a place of rocky terrain or indicating someone living near a rock formation.
According to the 2020 US Census Bureau surname tables, roughly 2,662 Americans carry the last name Larock. That puts it at #12,700 in the national surname ranking, appearing at a frequency of 0.78 per 100,000 people (about 1 in 128,758 residents).
This page is the full Name Census profile for the Larock 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
2.7K
1 in 128,758
Census rank
#12,700
2020 decennial data
Per 100,000
0.8
Frequency rate
Recorded bearers
2.3K
rare in the US
Popularity narrative
The Census Bureau recorded 2,321 bearers of the surname Larock in its 2020 decennial surname file. At a rate of 0.78 per 100,000 residents, it holds the 12700th position in the national surname ranking.
Among Census respondents with the surname Larock, the largest self-reported group is White at 86.8%. The next largest groups are Two or More Races (4.3%) and American Indian/Alaska Native (4.0%).
Origin
Meaning and origin of Larock
The surname LAROCK has its origins in France, with the name first appearing in records during the 12th century. It is believed to be derived from the Old French word "roche," meaning rock or rocky place, suggesting that the name may have been initially used to refer to someone who lived near a rocky area or cliff.
One of the earliest recorded instances of the surname LAROCK can be found in the records of Brittany, a region in northwestern France, where a family bearing this name was documented in the late 12th century. Over time, the name spread to other parts of France, with variations in spelling such as LaRoche, Laroche, and De La Roche emerging.
In the 14th century, a notable individual named Jacques LAROCK was mentioned in the chronicles of the city of Rouen, in Normandy. Jacques was a respected merchant and landowner, indicating that the LAROCK family had gained some prominence in the region by that time.
During the 16th century, the LAROCK surname appeared in various historical documents, including the records of the French nobility. One such example is Jean LAROCK, a French nobleman born in 1532 in the Languedoc region of southern France. Jean was known for his military service and participated in several campaigns during the French Wars of Religion.
Another notable individual with the surname LAROCK was Marie-Madeleine LAROCK, a French writer and poet who lived in the 17th century. Born in 1635 in Paris, she gained recognition for her literary works, which included a collection of poems published in 1672.
In the 18th century, the LAROCK name was associated with several influential figures in France. One such person was Louis-Gabriel LAROCK, a prominent architect born in 1726 in Lyon. He designed several notable buildings in Paris, including the Church of Saint-Sulpice and the Théâtre de l'Odéon.
The LAROCK surname also has a connection to place names in France, such as La Roche-sur-Yon, a town in the Vendée department, and La Roche-Posay, a commune in the Vienne department. These place names likely originated from the same root word as the surname, further reinforcing the link between LAROCK and rocky or mountainous areas.
Demographics
Ancestry and ethnicity for Larock
Among Census respondents with the surname Larock, the largest self-reported group is White at 86.8%. The next largest groups are Two or More Races (4.3%) and American Indian/Alaska Native (4.0%).
The bar chart below shows how Larock 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 Larock surname at the time of the 2020 Census, not any inherent property of the name itself.
- White86.8% · 2,014
- Two or more races4.3% · 100
- American Indian and Alaska Native4.0% · 94
- Hispanic or Latino2.4% · 55
- Black or African American2.2% · 50
- Asian and Pacific Islander0.3% · 8
Timeline
Historical Census data for Larock
Larock 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
#12,099
National surname rank
Recorded bearers 2,576
+186 bearers (+7.8%)
Per 100,000 0.87
Rank movement Down 105 places
2020
#12,700
National surname rank
Recorded bearers 2,321
-255 bearers (-9.9%)
Per 100,000 0.78
Rank movement Down 601 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #11,994 | 2,390 | 0.89 | First available Census row | First available Census row |
| 2010 | #12,099 | 2,576 | 0.87 | +186 bearers (+7.8%) | Down 105 places |
| 2020 | #12,700 | 2,321 | 0.78 | -255 bearers (-9.9%) | Down 601 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 Larock 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 | #12,099 | #12,700 | -5.0% |
| Count | 2,576 | 2,321 | -9.9% |
| Per 100K | 0.87 | 0.78 | -10.7% |
Between the 2010 and 2020 Census, the number of Larock bearers went from 2,576 to 2,321 (-9.9% change). The surname moved down 601 positions in the national ranking, going from #12,099 to #12,700.
FAQ
Larock surname: questions and answers
How many people in the U.S. have the surname Larock?
Name Census estimates that about 2,662 living Americans carry the surname Larock. Using the current population baseline, that works out to roughly 1 in 128,758 residents.
How common is Larock?
Larock ranks #12,700 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.78 per 100,000 residents, which is about 1 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 2,321 people with the surname Larock. That is different from the site's living-bearer estimate (2,662), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.78 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.78 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 1 of them to have the surname Larock.
Has Larock become more or less common over time?
Between 2010 and 2020, the surname Larock went from 2,576 recorded bearers to 2,321. That is a decrease of 255 (-9.9%). In the national ranking it fell from #12,099 to #12,700.
What does the Census say about the background of Larock?
Among Census respondents with the surname Larock, the largest self-reported group is White at 86.8%. The next largest groups are Two or More Races (4.3%) and American Indian/Alaska Native (4.0%). 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 Larock in the 2020 Census, accounting for 86.8% (2,014 people in the source table).
What is the full ancestry breakdown?
Larock appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (86.8%), Two or More Races (4.3%), American Indian/Alaska Native (4.0%). 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 Larock (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 Larock mean?
French toponymic surname derived from a place of rocky terrain or indicating someone living near a rock formation. 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 Larock (0.78 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 share the surname Larock?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.