2000
#13,871
National surname rank
Recorded bearers 1,998
First available Census row
Per 100,000 0.74
Rare Last name
Callanan
A Gaelic surname derived from "O Callanain," meaning "descendant of Callanán," a personal name of uncertain origin.
According to the 2020 US Census Bureau surname tables, roughly 2,108 Americans carry the last name Callanan. That puts it at #15,372 in the national surname ranking, appearing at a frequency of 0.61 per 100,000 people (about 1 in 162,597 residents).
This page is the full Name Census profile for the Callanan 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 Callanan with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
2.1K
1 in 162,597
Census rank
#15,372
2020 decennial data
Per 100,000
0.6
Frequency rate
Recorded bearers
1.8K
rare in the US
Popularity narrative
The Census Bureau recorded 1,838 bearers of the surname Callanan in its 2020 decennial surname file. At a rate of 0.61 per 100,000 residents, it holds the 15372nd position in the national surname ranking.
Among Census respondents with the surname Callanan, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (4.7%) and Two or More Races (2.3%).
Origin
Meaning and origin of Callanan
The surname CALLANAN is of Irish origin, derived from the Gaelic personal name "O'Callánan" or "O'Callánáin", meaning "descendant of Callánán". The name Callánán is a diminutive form of the Irish name "Callan", which is thought to have derived from the Latin word "calvus", meaning "bald".
The CALLANAN surname has its roots in County Cork, Ireland, where it was first found in the baronies of Fermoy and Condons. The earliest recorded instances of this name date back to the 16th century. In the Fiants of the reign of Elizabeth I, the name "O'Callanan" is mentioned in connection with landholdings in County Cork.
The Callanan family played a significant role in the history of County Cork. One notable member was Callanan of Shanbally, who is mentioned in historical records from the 17th century as a prominent landowner. Another important figure was the Irish poet Jeremiah Joseph Callanan (1795-1829), who was born in Cork and is renowned for his translations of Irish poetry into English.
In the 19th century, the CALLANAN surname started to spread beyond its traditional homeland in County Cork. One notable example is Sir James Philip Callanan (1856-1935), a British civil engineer who was involved in the construction of the Manchester Ship Canal and was knighted for his contributions to public works.
Other notable individuals with the CALLANAN surname include Michael Joseph Callanan (1877-1935), an Irish-American Catholic priest and author; and James Callanan (1795-1829), an Irish poet and writer who is best known for his translations of Irish poetry and his work in preserving Irish literature.
The CALLANAN name has also been found in various spellings and forms throughout history, such as Calanan, Calanane, and O'Callanane. Additionally, some place names in County Cork, such as Callanafersy and Callanavornoge, are believed to be derived from or related to the CALLANAN surname.
Demographics
Ancestry and ethnicity for Callanan
Among Census respondents with the surname Callanan, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (4.7%) and Two or More Races (2.3%).
The bar chart below shows how Callanan 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 Callanan surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.2% · 1,677
- Hispanic or Latino4.7% · 87
- Two or more races2.3% · 43
- Asian and Pacific Islander0.8% · 15
- Black or African American0.7% · 13
- American Indian and Alaska Native0.2% · 3
Timeline
Historical Census data for Callanan
Callanan 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
#12,760
National surname rank
Recorded bearers 2,418
+420 bearers (+21.0%)
Per 100,000 0.82
Rank movement Up 1,111 places
2020
#15,372
National surname rank
Recorded bearers 1,838
-580 bearers (-24.0%)
Per 100,000 0.61
Rank movement Down 2,612 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #13,871 | 1,998 | 0.74 | First available Census row | First available Census row |
| 2010 | #12,760 | 2,418 | 0.82 | +420 bearers (+21.0%) | Up 1,111 places |
| 2020 | #15,372 | 1,838 | 0.61 | -580 bearers (-24.0%) | Down 2,612 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 Callanan 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 | #12,760 | #15,372 | -20.5% |
| Count | 2,418 | 1,838 | -24.0% |
| Per 100K | 0.82 | 0.61 | -25.0% |
Between the 2010 and 2020 Census, the number of Callanan bearers went from 2,418 to 1,838 (-24.0% change). The surname moved down 2,612 positions in the national ranking, going from #12,760 to #15,372.
FAQ
Callanan surname: questions and answers
How many people in the U.S. have the surname Callanan?
Name Census estimates that about 2,108 living Americans carry the surname Callanan. Using the current population baseline, that works out to roughly 1 in 162,597 residents.
How common is Callanan?
Callanan ranks #15,372 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.61 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 1,838 people with the surname Callanan. That is different from the site's living-bearer estimate (2,108), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.61 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.61 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 Callanan.
Has Callanan become more or less common over time?
Between 2010 and 2020, the surname Callanan went from 2,418 recorded bearers to 1,838. That is a decrease of 580 (-24.0%). In the national ranking it fell from #12,760 to #15,372.
What does the Census say about the background of Callanan?
Among Census respondents with the surname Callanan, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (4.7%) and Two or More Races (2.3%). 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 Callanan in the 2020 Census, accounting for 91.2% (1,677 people in the source table).
What is the full ancestry breakdown?
Callanan appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.2%), Hispanic (4.7%), Two or More Races (2.3%). 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 Callanan (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 Callanan mean?
A Gaelic surname derived from "O Callanain," meaning "descendant of Callanán," a personal name of uncertain origin. 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 Callanan (0.61 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 Americans have the surname Callanan?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.