2010
#150,452
National surname rank
Recorded bearers 109
First available Census row
Per 100,000 0.04
Very Rare Last name
Ouart
A French occupational surname derived from the Old French "oveor" meaning "worker".
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Ouart. That puts it at #141,309 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,465,859 residents).
This page is the full Name Census profile for the Ouart 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
139
1 in 2,465,859
Census rank
#141,309
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
121
very rare in the US
Popularity narrative
The Census Bureau recorded 121 bearers of the surname Ouart in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 141309th position in the national surname ranking.
Among Census respondents with the surname Ouart, the largest self-reported group is White at 88.4%. The next largest groups are Hispanic (5.8%) and Two or More Races (2.5%).
Origin
Meaning and origin of Ouart
The surname Ouart has its origins in the northern regions of France, with records dating back to the 12th century. It is believed to be derived from the Old French word "ouarde," meaning "watchful" or "vigilant." This suggests that the name may have been initially given to a sentry or guard responsible for keeping watch over a particular area or settlement.
One of the earliest recorded instances of the name can be found in the 1195 census rolls of Normandy, where a certain Robert Ouart is listed as a resident of the village of Évreux. Another early reference appears in the Pipe Rolls of Lincolnshire from 1202, mentioning a William Ouart who held land in the county.
In the 13th century, the name appears to have spread southward, with a Jehan Ouart documented in the records of the town of Chartres in 1268. This individual is believed to have been a merchant or tradesman, indicating that the name had transitioned from its original association with military or guard duties.
The Ouart family seems to have established a notable presence in the region of Picardy during the late medieval period. In the 1381 tax rolls of Amiens, several Ouart households are listed, suggesting that the name had become well-established in the area.
One notable figure bearing the Ouart surname was Jacques Ouart, a prominent lawyer and jurist who lived in Paris during the 15th century. Born in 1420, he served as a judge in the Parlement of Paris and was known for his expertise in civil and canon law.
Another individual of note was Philippe Ouart, a French soldier who fought in the Italian Wars of the 16th century. He served under the command of King Francis I and participated in the Battle of Marignano in 1515, where he reportedly distinguished himself for his bravery and skill in combat.
In the 17th century, the name Ouart appears to have spread further across Europe, with records indicating its presence in the Netherlands and parts of Germany. One such example is Jan Ouart, a Dutch merchant and trader who established a successful business in Amsterdam, dealing in goods imported from the East Indies.
The 18th century saw the emergence of a notable Ouart family in the French city of Lyon. Jean-Baptiste Ouart, born in 1735, was a renowned silk weaver and textile manufacturer, contributing significantly to the city's thriving silk industry during that period.
As the centuries progressed, the Ouart surname continued to be carried by individuals from various walks of life, including artists, scholars, and professionals. However, records from this time period become increasingly scarce, as the name's prevalence began to decline in comparison to its earlier prominence.
Demographics
Ancestry and ethnicity for Ouart
Among Census respondents with the surname Ouart, the largest self-reported group is White at 88.4%. The next largest groups are Hispanic (5.8%) and Two or More Races (2.5%).
The bar chart below shows how Ouart 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 Ouart surname at the time of the 2020 Census, not any inherent property of the name itself.
- White88.4% · 107
- Hispanic or Latino5.8% · 7
- Two or more races2.5% · 3
- Asian and Pacific Islander1.7% · 2
- Black or African American0.8% · 1
- American Indian and Alaska Native0.8% · 1
Timeline
Historical Census data for Ouart
Ouart 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
#141,309
National surname rank
Recorded bearers 121
+12 bearers (+11.0%)
Per 100,000 0.04
Rank movement Up 9,143 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #150,452 | 109 | 0.04 | First available Census row | First available Census row |
| 2020 | #141,309 | 121 | 0.04 | +12 bearers (+11.0%) | Up 9,143 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 Ouart 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 | #150,452 | #141,309 | 6.1% |
| Count | 109 | 121 | 11.0% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Ouart bearers went from 109 to 121 (+11.0% change). The surname moved up 9,143 positions in the national ranking, going from #150,452 to #141,309.
FAQ
Ouart surname: questions and answers
How many people in the U.S. have the surname Ouart?
Name Census estimates that about 139 living Americans carry the surname Ouart. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Ouart?
Ouart ranks #141,309 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 121 people with the surname Ouart. That is different from the site's living-bearer estimate (139), 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 Ouart.
Has Ouart become more or less common over time?
Between 2010 and 2020, the surname Ouart went from 109 recorded bearers to 121. That is an increase of 12 (+11.0%). In the national ranking it rose from #150,452 to #141,309.
What does the Census say about the background of Ouart?
Among Census respondents with the surname Ouart, the largest self-reported group is White at 88.4%. The next largest groups are Hispanic (5.8%) and Two or More Races (2.5%). 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 Ouart in the 2020 Census, accounting for 88.4% (107 people in the source table).
What is the full ancestry breakdown?
Ouart appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (88.4%), Hispanic (5.8%), Two or More Races (2.5%). 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 Ouart (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 Ouart mean?
A French occupational surname derived from the Old French "oveor" meaning "worker". 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 Ouart (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 Ouart?
Want to know how many people have the surname Ouart? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.