2000
#41,859
National surname rank
Recorded bearers 489
First available Census row
Per 100,000 0.18
Very Rare Last name
Ofallon
A surname of French origin referring to someone from Fallon, a place in France.
According to the 2020 US Census Bureau surname tables, roughly 622 Americans carry the last name Ofallon. That puts it at #43,008 in the national surname ranking, appearing at a frequency of 0.18 per 100,000 people (about 1 in 551,052 residents).
This page is the full Name Census profile for the Ofallon 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
622
1 in 551,052
Census rank
#43,008
2020 decennial data
Per 100,000
0.2
Frequency rate
Recorded bearers
542
very rare in the US
Popularity narrative
The Census Bureau recorded 542 bearers of the surname Ofallon in its 2020 decennial surname file. At a rate of 0.18 per 100,000 residents, it holds the 43008th position in the national surname ranking.
Among Census respondents with the surname Ofallon, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (4.1%) and Two or More Races (3.3%).
Origin
Meaning and origin of Ofallon
The surname OFALLON has its origins in Ireland, dating back to the 16th century. It is believed to be derived from the Gaelic word "O'Fallúnta," which translates to "descendent of the plunderer" or "one who is destructive." The name was initially concentrated in the counties of Cork and Kerry, where the first recorded instances of the surname can be found.
During the 17th century, the OFALLON name appeared in various historical records, including the Fiants of the Reign of Elizabeth I and the Chancery Rolls of the 16th and 17th centuries. These documents provide valuable insights into the lives and activities of individuals bearing this surname during that era.
The earliest known person with the surname OFALLON was Donough O'Fallon, who lived in County Cork in the late 16th century. He was a prominent figure in the local community and was recognized for his involvement in various political and social affairs.
Another notable individual was Dermot O'Fallon, born in 1612 in County Kerry. He served as a captain in the Irish Confederate Wars and played a significant role in the conflicts of the time.
In the 18th century, the OFALLON name gained recognition with the birth of Patrick O'Fallon (1734-1812), a renowned Irish politician and landowner. He was actively involved in the Irish Parliament and was widely respected for his contributions to local governance.
The name also has connections to the United States, where many Irish immigrants settled in the 19th century. One of the most famous OFALLONS was John OFALLON (1791-1865), a successful businessman and philanthropist who founded the city of O'Fallon, Missouri, which bears his name.
Another notable figure was Bishop John OFALLON (1820-1892), a prominent Roman Catholic clergyman who served as the Bishop of London, Ontario, Canada. He was known for his leadership and dedication to the Church and played a crucial role in the development of Catholic education in the region.
As the name spread across the globe, it underwent various spellings and variations, such as O'Fallon, O'Ffallon, and Ofallon, reflecting the influence of different languages and regional dialects.
Demographics
Ancestry and ethnicity for Ofallon
Among Census respondents with the surname Ofallon, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (4.1%) and Two or More Races (3.3%).
The bar chart below shows how Ofallon 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 Ofallon surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.9% · 498
- Hispanic or Latino4.1% · 22
- Two or more races3.3% · 18
- Asian and Pacific Islander0.4% · 2
- Black or African American0.2% · 1
- American Indian and Alaska Native0.2% · 1
Timeline
Historical Census data for Ofallon
Ofallon 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
#39,164
National surname rank
Recorded bearers 562
+73 bearers (+14.9%)
Per 100,000 0.19
Rank movement Up 2,695 places
2020
#43,008
National surname rank
Recorded bearers 542
-20 bearers (-3.6%)
Per 100,000 0.18
Rank movement Down 3,844 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #41,859 | 489 | 0.18 | First available Census row | First available Census row |
| 2010 | #39,164 | 562 | 0.19 | +73 bearers (+14.9%) | Up 2,695 places |
| 2020 | #43,008 | 542 | 0.18 | -20 bearers (-3.6%) | Down 3,844 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 Ofallon 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 | #39,164 | #43,008 | -9.8% |
| Count | 562 | 542 | -3.6% |
| Per 100K | 0.19 | 0.18 | -4.6% |
Between the 2010 and 2020 Census, the number of Ofallon bearers went from 562 to 542 (-3.6% change). The surname moved down 3,844 positions in the national ranking, going from #39,164 to #43,008.
Notable bearers
Famous people with the surname Ofallon
FAQ
Ofallon surname: questions and answers
How many people in the U.S. have the surname Ofallon?
Name Census estimates that about 622 living Americans carry the surname Ofallon. Using the current population baseline, that works out to roughly 1 in 551,052 residents.
How common is Ofallon?
Ofallon ranks #43,008 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.18 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 542 people with the surname Ofallon. That is different from the site's living-bearer estimate (622), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.18 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.18 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 Ofallon.
Has Ofallon become more or less common over time?
Between 2010 and 2020, the surname Ofallon went from 562 recorded bearers to 542. That is a decrease of 20 (-3.6%). In the national ranking it fell from #39,164 to #43,008.
What does the Census say about the background of Ofallon?
Among Census respondents with the surname Ofallon, the largest self-reported group is White at 91.9%. The next largest groups are Hispanic (4.1%) 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 Ofallon in the 2020 Census, accounting for 91.9% (498 people in the source table).
What is the full ancestry breakdown?
Ofallon appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.9%), Hispanic (4.1%), 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 Ofallon (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 Ofallon mean?
A surname of French origin referring to someone from Fallon, a place 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 Ofallon (0.18 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 common is the surname Ofallon?
See how many people have the last name Ofallon on HowManyOfMe.org, our sister site built around that single question.