2000
#141,788
National surname rank
Recorded bearers 108
First available Census row
Per 100,000 0.04
Very Rare Last name
Mandat
A surname derived from the French word "mandat," meaning an official order or command.
According to the 2020 US Census Bureau surname tables, roughly 130 Americans carry the last name Mandat. That puts it at #147,221 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,636,572 residents).
This page is the full Name Census profile for the Mandat 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
130
1 in 2,636,572
Census rank
#147,221
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
113
very rare in the US
Popularity narrative
The Census Bureau recorded 113 bearers of the surname Mandat in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147221st position in the national surname ranking.
Among Census respondents with the surname Mandat, the largest self-reported group is White at 57.5%. The next largest groups are Black (27.4%) and Hispanic (8.0%).
Origin
Meaning and origin of Mandat
The surname MANDAT is of French origin, derived from the Old French word "mandat," meaning "mandate" or "command." It can be traced back to the 12th century in the regions of Normandy and Brittany.
The name likely originated as a surname for someone who held a position of authority or was entrusted with carrying out orders or commands. In some cases, it may have been a descriptive surname for a person with a commanding or authoritative presence.
One of the earliest recorded instances of the name MANDAT can be found in the Cartulaire de Saint-Père de Chartres, a medieval cartulary from the 12th century, which mentions a person named Robertus Mandat in the year 1169.
During the 13th century, the name appears in various records from the Duchy of Normandy, such as the Rôles Normands, where individuals with the surname MANDAT are mentioned in connection with land transactions and legal matters.
In the 14th century, the MANDAT surname can be found in the Livre des Bourgeois de Rouen, a register of citizens in the city of Rouen, Normandy. One notable entry is Jean Mandat, a merchant recorded in 1382.
Moving into the 15th century, the name appears in the records of the Parlement de Paris, the oldest sovereign court in France. In 1468, a case involving Guillaume Mandat, a landowner from the region of Brittany, is documented.
Throughout history, several notable individuals have borne the surname MANDAT, including:
1. Gilles Mandat (1599-1672), a French mathematician and astronomer who made significant contributions to the development of algebraic geometry.
2. Jean-Baptiste Mandat (1732-1799), a French revolutionist and member of the National Convention during the French Revolution.
3. Marie-Antoinette Mandat (1789-1856), a French painter and portraitist renowned for her depictions of Parisian society during the early 19th century.
4. Georges Mandat (1856-1921), a French politician and statesman who served as the Minister of the Interior during the Third Republic.
5. Henri Mandat (1898-1976), a French architect best known for his work on the reconstruction of the city of Le Havre after World War II.
Demographics
Ancestry and ethnicity for Mandat
Among Census respondents with the surname Mandat, the largest self-reported group is White at 57.5%. The next largest groups are Black (27.4%) and Hispanic (8.0%).
The bar chart below shows how Mandat 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 Mandat surname at the time of the 2020 Census, not any inherent property of the name itself.
- White57.5% · 65
- Black or African American27.4% · 31
- Hispanic or Latino8.0% · 9
- Two or more races3.5% · 4
- Asian and Pacific Islander2.7% · 3
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Mandat
Mandat 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
#136,449
National surname rank
Recorded bearers 123
+15 bearers (+13.9%)
Per 100,000 0.04
Rank movement Up 5,339 places
2020
#147,221
National surname rank
Recorded bearers 113
-10 bearers (-8.1%)
Per 100,000 0.04
Rank movement Down 10,772 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #141,788 | 108 | 0.04 | First available Census row | First available Census row |
| 2010 | #136,449 | 123 | 0.04 | +15 bearers (+13.9%) | Up 5,339 places |
| 2020 | #147,221 | 113 | 0.04 | -10 bearers (-8.1%) | Down 10,772 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 Mandat 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 | #136,449 | #147,221 | -7.9% |
| Count | 123 | 113 | -8.1% |
| Per 100K | 0.04 | 0.04 | -5.5% |
Between the 2010 and 2020 Census, the number of Mandat bearers went from 123 to 113 (-8.1% change). The surname moved down 10,772 positions in the national ranking, going from #136,449 to #147,221.
FAQ
Mandat surname: questions and answers
How many people in the U.S. have the surname Mandat?
Name Census estimates that about 130 living Americans carry the surname Mandat. Using the current population baseline, that works out to roughly 1 in 2,636,572 residents.
How common is Mandat?
Mandat ranks #147,221 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 113 people with the surname Mandat. That is different from the site's living-bearer estimate (130), 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 Mandat.
Has Mandat become more or less common over time?
Between 2010 and 2020, the surname Mandat went from 123 recorded bearers to 113. That is a decrease of 10 (-8.1%). In the national ranking it fell from #136,449 to #147,221.
What does the Census say about the background of Mandat?
Among Census respondents with the surname Mandat, the largest self-reported group is White at 57.5%. The next largest groups are Black (27.4%) and Hispanic (8.0%). 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 Mandat in the 2020 Census, accounting for 57.5% (65 people in the source table).
What is the full ancestry breakdown?
Mandat appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (57.5%), Black (27.4%), Hispanic (8.0%). 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 Mandat (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 Mandat mean?
A surname derived from the French word "mandat," meaning an official order or command. 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 Mandat (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 Mandat?
Our sister site HowManyOfMe.org answers how common the surname Mandat is at a glance, with the living-bearer count up front.