2000
#137,816
National surname rank
Recorded bearers 112
First available Census row
Per 100,000 0.04
Very Rare Last name
Decormier
A habitational name for someone from any of various places called Cormier in France.
According to the 2020 US Census Bureau surname tables, roughly 123 Americans carry the last name Decormier. That puts it at #151,639 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,786,621 residents).
This page is the full Name Census profile for the Decormier 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
123
1 in 2,786,621
Census rank
#151,639
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
107
very rare in the US
Popularity narrative
The Census Bureau recorded 107 bearers of the surname Decormier in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 151639th position in the national surname ranking.
Among Census respondents with the surname Decormier, the largest self-reported group is White at 93.5%. The next largest groups are Two or More Races (3.7%) and American Indian/Alaska Native (1.9%).
Origin
Meaning and origin of Decormier
The surname DECORMIER has its origins in France, dating back to the Middle Ages. It is believed to have originated from the old French word "cormier," which refers to a type of wild cherry tree. This suggests that the name may have been given to someone who lived near or owned land with these trees.
One of the earliest recorded instances of the name can be found in the Dictionnaire Historique des Noms de Famille et Prénoms de France, a comprehensive reference work on French surnames and given names. It mentions a Jean Decormier who lived in the village of Brie-Comte-Robert, near Paris, in the 14th century.
During the 16th and 17th centuries, the surname appears to have spread to other regions of France, with variations in spelling such as "de Cormier," "Decormiers," and "Descormiers." These variations likely emerged due to regional dialects and scribal errors in record-keeping.
A notable figure with this surname was Jacques Decormier (1590-1652), a French merchant and shipowner from La Rochelle. He played a significant role in the city's maritime trade during the early 17th century.
Another historical reference is found in the writings of the French philosopher and essayist Michel de Montaigne (1533-1592). In one of his essays, he mentions a person named "Monsieur de Cormier" who was a member of the Parliament of Bordeaux.
As the name spread across France, it also found its way into other regions, including the French-speaking areas of modern-day Belgium and Switzerland. One such example is Jean-Baptiste Decormier (1776-1859), a Swiss watchmaker from Geneva who is credited with developing the first successful chronograph mechanism for timepieces.
In the 19th century, the name gained further prominence with the birth of Eugène Decormier (1827-1903), a French writer and journalist who was a prominent figure in the literary circles of Paris during the latter half of the century.
Another noteworthy individual was Émile Decormier (1845-1918), a French-Canadian politician and lawyer who served as a Member of Parliament in the Canadian House of Commons, representing the riding of Richelieu from 1904 to 1908.
Demographics
Ancestry and ethnicity for Decormier
Among Census respondents with the surname Decormier, the largest self-reported group is White at 93.5%. The next largest groups are Two or More Races (3.7%) and American Indian/Alaska Native (1.9%).
The bar chart below shows how Decormier 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 Decormier surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.5% · 100
- Two or more races3.7% · 4
- American Indian and Alaska Native1.9% · 2
- Hispanic or Latino0.9% · 1
Timeline
Historical Census data for Decormier
Decormier 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
#153,769
National surname rank
Recorded bearers 106
-6 bearers (-5.4%)
Per 100,000 0.04
Rank movement Down 15,953 places
2020
#151,639
National surname rank
Recorded bearers 107
+1 bearers (+0.9%)
Per 100,000 0.04
Rank movement Up 2,130 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #137,816 | 112 | 0.04 | First available Census row | First available Census row |
| 2010 | #153,769 | 106 | 0.04 | -6 bearers (-5.4%) | Down 15,953 places |
| 2020 | #151,639 | 107 | 0.04 | +1 bearers (+0.9%) | Up 2,130 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 Decormier 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 | #153,769 | #151,639 | 1.4% |
| Count | 106 | 107 | 0.9% |
| Per 100K | 0.04 | 0.04 | -10.5% |
Between the 2010 and 2020 Census, the number of Decormier bearers went from 106 to 107 (+0.9% change). The surname moved up 2,130 positions in the national ranking, going from #153,769 to #151,639.
FAQ
Decormier surname: questions and answers
How many people in the U.S. have the surname Decormier?
Name Census estimates that about 123 living Americans carry the surname Decormier. Using the current population baseline, that works out to roughly 1 in 2,786,621 residents.
How common is Decormier?
Decormier ranks #151,639 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 107 people with the surname Decormier. That is different from the site's living-bearer estimate (123), 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 Decormier.
Has Decormier become more or less common over time?
Between 2010 and 2020, the surname Decormier went from 106 recorded bearers to 107. That is an increase of 1 (+0.9%). In the national ranking it rose from #153,769 to #151,639.
What does the Census say about the background of Decormier?
Among Census respondents with the surname Decormier, the largest self-reported group is White at 93.5%. The next largest groups are Two or More Races (3.7%) and American Indian/Alaska Native (1.9%). 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 Decormier in the 2020 Census, accounting for 93.5% (100 people in the source table).
What is the full ancestry breakdown?
Decormier appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.5%), Two or More Races (3.7%), American Indian/Alaska Native (1.9%). 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 Decormier (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 Decormier mean?
A habitational name for someone from any of various places called Cormier in France. 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 Decormier (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 have the surname Decormier?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.