2000
#15,244
National surname rank
Recorded bearers 1,772
First available Census row
Per 100,000 0.66
Rare Last name
Finnigan
A surname of Irish origin, derived from the Gaelic name "Fionnagán," meaning "fair-haired."
According to the 2020 US Census Bureau surname tables, roughly 2,397 Americans carry the last name Finnigan. That puts it at #13,851 in the national surname ranking, appearing at a frequency of 0.70 per 100,000 people (about 1 in 142,993 residents).
This page is the full Name Census profile for the Finnigan 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 Finnigan with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
2.4K
1 in 142,993
Census rank
#13,851
2020 decennial data
Per 100,000
0.7
Frequency rate
Recorded bearers
2.1K
rare in the US
Popularity narrative
The Census Bureau recorded 2,090 bearers of the surname Finnigan in its 2020 decennial surname file. At a rate of 0.70 per 100,000 residents, it holds the 13851st position in the national surname ranking.
Among Census respondents with the surname Finnigan, the largest self-reported group is White at 90.5%. The next largest groups are Hispanic (4.2%) and Two or More Races (3.3%).
Origin
Meaning and origin of Finnigan
The surname Finnigan has its origins in Ireland, emerging during the Middle Ages. It is derived from the Gaelic personal name Fionnagán, which translates to "fair-born" or "white offspring." This name likely originated from the combination of the Gaelic elements "fionn," meaning fair or white, and "óg," meaning young or offspring.
Finnigan is a widespread surname found primarily in counties such as Galway, Mayo, and Sligo in the western regions of Ireland. It is an anglicized version of the original Gaelic name, with variations in spelling including Finegan, Finnegan, and Fenelon.
One of the earliest recorded mentions of the name Finnigan can be found in the Annals of the Four Masters, a chronicle of medieval Irish history. In the year 1352, it mentions a entry referring to "Fineen O'Finnigan," suggesting the surname's existence at that time.
The Finnigan surname has been associated with several notable individuals throughout history. One of the earliest recorded bearers of the name was Seán Ó Finagáin, a 16th-century Irish poet and historian from County Sligo. Another prominent figure was Seamus Finnigan, an Irish rebel and leader during the 1798 Irish Rebellion against British rule.
In the 19th century, Cornelius Finnigan (1824-1904) was an Irish-born American politician who served as a member of the Massachusetts State Senate. John Finnigan (1866-1942), born in County Mayo, was a successful businessman and philanthropist in the United States, known for his contributions to Catholic charities.
Another notable bearer of the Finnigan surname was Kathleen Finnigan (1902-1987), an Irish actress and comedian who enjoyed a successful career on stage and screen in the mid-20th century. She is particularly remembered for her portrayal of the character "Mrs. Doyle" in the popular Irish sitcom "Father Ted."
The Finnigan surname has also been linked to various place names throughout Ireland, such as Finnigan's Cross in County Mayo and Finnigan's Bridge in County Sligo, further emphasizing its deep roots in the Irish tradition and geography.
Demographics
Ancestry and ethnicity for Finnigan
Among Census respondents with the surname Finnigan, the largest self-reported group is White at 90.5%. The next largest groups are Hispanic (4.2%) and Two or More Races (3.3%).
The bar chart below shows how Finnigan 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 Finnigan surname at the time of the 2020 Census, not any inherent property of the name itself.
- White90.5% · 1,892
- Hispanic or Latino4.2% · 87
- Two or more races3.3% · 70
- Asian and Pacific Islander1.2% · 26
- Black or African American0.7% · 14
- American Indian and Alaska Native0.0% · 1
Timeline
Historical Census data for Finnigan
Finnigan 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
#21,759
National surname rank
Recorded bearers 1,195
-577 bearers (-32.6%)
Per 100,000 0.41
Rank movement Down 6,515 places
2020
#13,851
National surname rank
Recorded bearers 2,090
+895 bearers (+74.9%)
Per 100,000 0.70
Rank movement Up 7,908 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #15,244 | 1,772 | 0.66 | First available Census row | First available Census row |
| 2010 | #21,759 | 1,195 | 0.41 | -577 bearers (-32.6%) | Down 6,515 places |
| 2020 | #13,851 | 2,090 | 0.70 | +895 bearers (+74.9%) | Up 7,908 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 Finnigan 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 | #21,759 | #13,851 | 36.3% |
| Count | 1,195 | 2,090 | 74.9% |
| Per 100K | 0.41 | 0.70 | 70.5% |
Between the 2010 and 2020 Census, the number of Finnigan bearers went from 1,195 to 2,090 (+74.9% change). The surname moved up 7,908 positions in the national ranking, going from #21,759 to #13,851.
FAQ
Finnigan surname: questions and answers
How many people in the U.S. have the surname Finnigan?
Name Census estimates that about 2,397 living Americans carry the surname Finnigan. Using the current population baseline, that works out to roughly 1 in 142,993 residents.
How common is Finnigan?
Finnigan ranks #13,851 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.70 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 2,090 people with the surname Finnigan. That is different from the site's living-bearer estimate (2,397), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.7 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.70 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 Finnigan.
Has Finnigan become more or less common over time?
Between 2010 and 2020, the surname Finnigan went from 1,195 recorded bearers to 2,090. That is an increase of 895 (+74.9%). In the national ranking it rose from #21,759 to #13,851.
What does the Census say about the background of Finnigan?
Among Census respondents with the surname Finnigan, the largest self-reported group is White at 90.5%. The next largest groups are Hispanic (4.2%) and Two or More Races (3.3%). 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 Finnigan in the 2020 Census, accounting for 90.5% (1,892 people in the source table).
What is the full ancestry breakdown?
Finnigan appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (90.5%), Hispanic (4.2%), Two or More Races (3.3%). 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 Finnigan (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 Finnigan mean?
A surname of Irish origin, derived from the Gaelic name "Fionnagán," meaning "fair-haired." 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 Finnigan (0.70 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 Finnigan?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.