2010
#160,975
National surname rank
Recorded bearers 100
First available Census row
Per 100,000 0.03
Very Rare Last name
Rocourt
A locational surname for someone from a place called Rocourt.
According to the 2020 US Census Bureau surname tables, roughly 134 Americans carry the last name Rocourt. That puts it at #144,270 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,557,868 residents).
This page is the full Name Census profile for the Rocourt 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
134
1 in 2,557,868
Census rank
#144,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
117
very rare in the US
Popularity narrative
The Census Bureau recorded 117 bearers of the surname Rocourt in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 144270th position in the national surname ranking.
Among Census respondents with the surname Rocourt, the largest self-reported group is Black at 61.5%. The next largest groups are White (17.1%) and Two or More Races (13.7%).
Origin
Meaning and origin of Rocourt
The surname Rocourt is of French origin, originating in the northern regions of the country during the medieval period. It is derived from the Old French words "roche" meaning "rock" and "court" meaning "courtyard" or "small estate." This suggests that the name likely referred to a family or individual who lived near or owned a courtyard built of stone or near a rocky outcrop.
One of the earliest recorded instances of the name Rocourt can be found in the 13th-century manuscript "Cartulaire de l'Abbaye de Cercamp," which mentions a nobleman named Raoul de Rocourt. This indicates that the name was well-established in the Picardy region of northern France by this time.
Another notable early reference to the name Rocourt is found in the 14th-century "Rôles de l'Échiquier de Normandie," which lists a certain Guillaume de Rocourt as a landowner in the Normandy region. This suggests that the name had spread to different parts of northern France by this point.
In the 16th century, a French nobleman named Jean de Rocourt is recorded as having fought in the Italian Wars under King Francis I. He is believed to have been born around 1490 and died in the latter half of the 16th century.
During the 17th century, a prominent figure bearing the surname Rocourt was Michel de Rocourt, a French military engineer who was instrumental in the construction of fortifications in several cities, including Lille and Valenciennes. He was born in Picardy in 1618 and died in 1693.
Another noteworthy individual with the surname Rocourt was François de Rocourt, a French writer and philosopher who lived in the late 17th and early 18th centuries. He was born in Paris in 1667 and is known for his philosophical works, including "Traité de la Nature de l'Âme" (Treatise on the Nature of the Soul), published in 1712.
While the surname Rocourt has French origins, it has since spread to other countries, with families bearing this name found in regions such as Belgium, Canada, and the United States, likely due to immigration from France over the centuries.
Demographics
Ancestry and ethnicity for Rocourt
Among Census respondents with the surname Rocourt, the largest self-reported group is Black at 61.5%. The next largest groups are White (17.1%) and Two or More Races (13.7%).
The bar chart below shows how Rocourt 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 Rocourt surname at the time of the 2020 Census, not any inherent property of the name itself.
- Black or African American61.5% · 72
- White17.1% · 20
- Two or more races13.7% · 16
- Hispanic or Latino6.0% · 7
- Asian and Pacific Islander1.7% · 2
Timeline
Historical Census data for Rocourt
Rocourt 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
#144,270
National surname rank
Recorded bearers 117
+17 bearers (+17.0%)
Per 100,000 0.04
Rank movement Up 16,705 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #160,975 | 100 | 0.03 | First available Census row | First available Census row |
| 2020 | #144,270 | 117 | 0.04 | +17 bearers (+17.0%) | Up 16,705 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 Rocourt 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 | #160,975 | #144,270 | 10.4% |
| Count | 100 | 117 | 17.0% |
| Per 100K | 0.03 | 0.04 | 30.5% |
Between the 2010 and 2020 Census, the number of Rocourt bearers went from 100 to 117 (+17.0% change). The surname moved up 16,705 positions in the national ranking, going from #160,975 to #144,270.
FAQ
Rocourt surname: questions and answers
How many people in the U.S. have the surname Rocourt?
Name Census estimates that about 134 living Americans carry the surname Rocourt. Using the current population baseline, that works out to roughly 1 in 2,557,868 residents.
How common is Rocourt?
Rocourt ranks #144,270 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 117 people with the surname Rocourt. That is different from the site's living-bearer estimate (134), 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 Rocourt.
Has Rocourt become more or less common over time?
Between 2010 and 2020, the surname Rocourt went from 100 recorded bearers to 117. That is an increase of 17 (+17.0%). In the national ranking it rose from #160,975 to #144,270.
What does the Census say about the background of Rocourt?
Among Census respondents with the surname Rocourt, the largest self-reported group is Black at 61.5%. The next largest groups are White (17.1%) and Two or More Races (13.7%). 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?
Black is the largest self-reported group for the surname Rocourt in the 2020 Census, accounting for 61.5% (72 people in the source table).
What is the full ancestry breakdown?
Rocourt appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Black (61.5%), White (17.1%), Two or More Races (13.7%). 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 Rocourt (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 Rocourt mean?
A locational surname for someone from a place called Rocourt. 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 Rocourt (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 share the surname Rocourt?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.