2000
#12,410
National surname rank
Recorded bearers 2,294
First available Census row
Per 100,000 0.85
Rare Last name
Concannon
A surname of Irish origin, derived from the Gaelic "O Conceanainn," meaning "descendant of the wolf head."
According to the 2020 US Census Bureau surname tables, roughly 2,378 Americans carry the last name Concannon. That puts it at #13,928 in the national surname ranking, appearing at a frequency of 0.69 per 100,000 people (about 1 in 144,136 residents).
This page is the full Name Census profile for the Concannon 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.
For British records, Name Census UK has a British surname profile for Concannon with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
2.4K
1 in 144,136
Census rank
#13,928
2020 decennial data
Per 100,000
0.7
Frequency rate
Recorded bearers
2.1K
rare in the US
Popularity narrative
The Census Bureau recorded 2,074 bearers of the surname Concannon in its 2020 decennial surname file. At a rate of 0.69 per 100,000 residents, it holds the 13928th position in the national surname ranking.
Among Census respondents with the surname Concannon, the largest self-reported group is White at 92.6%. The next largest groups are Two or More Races (2.9%) and Hispanic (2.9%).
Origin
Meaning and origin of Concannon
The surname Concannon originated in Ireland, with its earliest recorded instances dating back to the 12th century. It is an Anglicized form of the Irish Gaelic name Ó Conchubhair, which means 'descendant of Conchubhar'. Conchubhar was a personal name derived from the Old Irish word 'con' meaning 'hound' or 'wolf', and 'chobhar' meaning 'help' or 'aid'.
The Concannon family hailed from the ancient territory of Uí Fiachrach Aidne in County Galway. This region encompassed parts of modern-day County Galway and County Mayo. The name is particularly associated with the barony of Kilmaine in County Mayo, where the Concannon clan held significant influence and landholdings.
One of the earliest recorded instances of the name appears in the Annals of the Four Masters, a chronicle of medieval Irish history. In 1249, the Annals mention a notable figure named Conchobhar Ó Conchobhair, who was described as the Chief of Uí Fiachrach Aidne.
The Concannon name also appears in various historical documents and records from the 16th and 17th centuries. In 1585, a John Concannon was listed as a landowner in the Fiants of Elizabeth I, a collection of official letters and documents from the reign of Queen Elizabeth I.
Notable individuals with the Concannon surname include Roderic O'Concannon (c. 1570-1610), an Irish chieftain and landowner in County Galway. Another prominent figure was Andrew Concannon (1627-1675), a Catholic priest and philosopher who was a member of the Franciscan Order and taught at the University of Louvain in Belgium.
In the 18th century, John Concannon (1730-1803) was a respected physician and author who wrote several medical treatises. He served as the President of the Royal College of Physicians in Ireland from 1796 to 1798.
During the 19th century, Matthew Concannon (1810-1890) was a prominent Irish nationalist and member of the Young Ireland movement. He was a journalist and editor of the Nation newspaper, which advocated for Irish independence from British rule.
Another notable bearer of the name was Thomas Concannon (1828-1916), a successful businessman and entrepreneur from County Galway. He emigrated to the United States and founded the Concannon Vineyard in California's Livermore Valley, one of the earliest commercial wineries in the region.
Demographics
Ancestry and ethnicity for Concannon
Among Census respondents with the surname Concannon, the largest self-reported group is White at 92.6%. The next largest groups are Two or More Races (2.9%) and Hispanic (2.9%).
The bar chart below shows how Concannon 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 Concannon surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.6% · 1,921
- Two or more races2.9% · 61
- Hispanic or Latino2.9% · 60
- Asian and Pacific Islander0.9% · 18
- Black or African American0.5% · 10
- American Indian and Alaska Native0.2% · 4
Timeline
Historical Census data for Concannon
Concannon 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
#13,376
National surname rank
Recorded bearers 2,277
-17 bearers (-0.7%)
Per 100,000 0.77
Rank movement Down 966 places
2020
#13,928
National surname rank
Recorded bearers 2,074
-203 bearers (-8.9%)
Per 100,000 0.69
Rank movement Down 552 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #12,410 | 2,294 | 0.85 | First available Census row | First available Census row |
| 2010 | #13,376 | 2,277 | 0.77 | -17 bearers (-0.7%) | Down 966 places |
| 2020 | #13,928 | 2,074 | 0.69 | -203 bearers (-8.9%) | Down 552 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 Concannon 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 | #13,376 | #13,928 | -4.1% |
| Count | 2,277 | 2,074 | -8.9% |
| Per 100K | 0.77 | 0.69 | -9.9% |
Between the 2010 and 2020 Census, the number of Concannon bearers went from 2,277 to 2,074 (-8.9% change). The surname moved down 552 positions in the national ranking, going from #13,376 to #13,928.
FAQ
Concannon surname: questions and answers
How many people in the U.S. have the surname Concannon?
Name Census estimates that about 2,378 living Americans carry the surname Concannon. Using the current population baseline, that works out to roughly 1 in 144,136 residents.
How common is Concannon?
Concannon ranks #13,928 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.69 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 2,074 people with the surname Concannon. That is different from the site's living-bearer estimate (2,378), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.69 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.69 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 Concannon.
Has Concannon become more or less common over time?
Between 2010 and 2020, the surname Concannon went from 2,277 recorded bearers to 2,074. That is a decrease of 203 (-8.9%). In the national ranking it fell from #13,376 to #13,928.
What does the Census say about the background of Concannon?
Among Census respondents with the surname Concannon, the largest self-reported group is White at 92.6%. The next largest groups are Two or More Races (2.9%) and Hispanic (2.9%). 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 Concannon in the 2020 Census, accounting for 92.6% (1,921 people in the source table).
What is the full ancestry breakdown?
Concannon appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.6%), Two or More Races (2.9%), Hispanic (2.9%). 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 Concannon (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 Concannon mean?
A surname of Irish origin, derived from the Gaelic "O Conceanainn," meaning "descendant of the wolf head." 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 Concannon (0.69 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 last name Concannon?
Our sister site HowManyOfMe.org answers how many people are called Concannon at a glance, with the living-bearer count up front.