2000
#15,364
National surname rank
Recorded bearers 1,754
First available Census row
Per 100,000 0.65
Rare Last name
Fitzsimons
Son of Simons, referring to a patronymic surname.
According to the 2020 US Census Bureau surname tables, roughly 2,205 Americans carry the last name Fitzsimons. That puts it at #14,806 in the national surname ranking, appearing at a frequency of 0.64 per 100,000 people (about 1 in 155,444 residents).
This page is the full Name Census profile for the Fitzsimons 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 Fitzsimons with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
2.2K
1 in 155,444
Census rank
#14,806
2020 decennial data
Per 100,000
0.6
Frequency rate
Recorded bearers
1.9K
rare in the US
Popularity narrative
The Census Bureau recorded 1,923 bearers of the surname Fitzsimons in its 2020 decennial surname file. At a rate of 0.64 per 100,000 residents, it holds the 14806th position in the national surname ranking.
Among Census respondents with the surname Fitzsimons, the largest self-reported group is White at 92.8%. The next largest groups are Hispanic (3.2%) and Two or More Races (2.7%).
Origin
Meaning and origin of Fitzsimons
The surname FITZSIMONS is of Anglo-Norman origin, originating in England following the Norman conquest of 1066. It is a patronymic surname, meaning "son of Simon." The prefix "Fitz" is derived from the Norman French word "fils," meaning son.
During the Middle Ages, it was common practice for families to adopt surnames based on the father's given name, with the prefix "Fitz" indicating "son of." This particular surname suggests that the original bearer was the son of a man named Simon.
The earliest known records of the surname FITZSIMONS date back to the 12th century in various parts of England, such as Yorkshire, Lincolnshire, and Gloucestershire. It is likely that the name originated in one of these regions, where the Norman influence was particularly strong.
In medieval times, surnames were often spelled in various ways due to inconsistent record-keeping practices and regional dialects. As a result, variations of the FITZSIMONS surname, such as Fitz-Simon, Fitzsimmons, and Fitzsimond, can be found in historical documents.
One notable early record of the surname is found in the Pipe Rolls of Gloucestershire from 1195, which mention a William Fitz Simone. Another early reference is in the Feet of Fines for Yorkshire from 1208, which includes a Robert Fitz Simone.
Throughout history, several prominent individuals have borne the FITZSIMONS surname. These include:
1. Robert FitzSimon (c. 1140-1205), an Anglo-Norman nobleman and Lord of Raghly, Ireland.
2. Walter FitzSimon (fl. 1215), an English clergyman and Archbishop of Canterbury from 1193 to 1206.
3. Henry FitzSimon (c. 1566-1643), an Irish Jesuit priest and polemical writer.
4. Nathaniel FitzSimons (1630-1703), an English clergyman and author of religious works.
5. Robert FitzSimons (1804-1865), an Irish-born American politician who served as the 13th Governor of Georgia from 1854 to 1857.
The FITZSIMONS surname has a rich history rooted in the Anglo-Norman legacy, with its origins dating back to the 12th century in various parts of England. Over the centuries, it has been carried by individuals from diverse backgrounds, including nobility, clergymen, writers, and politicians.
Demographics
Ancestry and ethnicity for Fitzsimons
Among Census respondents with the surname Fitzsimons, the largest self-reported group is White at 92.8%. The next largest groups are Hispanic (3.2%) and Two or More Races (2.7%).
The bar chart below shows how Fitzsimons 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 Fitzsimons surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.8% · 1,784
- Hispanic or Latino3.2% · 62
- Two or more races2.7% · 52
- Asian and Pacific Islander0.9% · 17
- Black or African American0.3% · 6
- American Indian and Alaska Native0.1% · 2
Timeline
Historical Census data for Fitzsimons
Fitzsimons 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
#15,719
National surname rank
Recorded bearers 1,855
+101 bearers (+5.8%)
Per 100,000 0.63
Rank movement Down 355 places
2020
#14,806
National surname rank
Recorded bearers 1,923
+68 bearers (+3.7%)
Per 100,000 0.64
Rank movement Up 913 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #15,364 | 1,754 | 0.65 | First available Census row | First available Census row |
| 2010 | #15,719 | 1,855 | 0.63 | +101 bearers (+5.8%) | Down 355 places |
| 2020 | #14,806 | 1,923 | 0.64 | +68 bearers (+3.7%) | Up 913 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 Fitzsimons 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 | #15,719 | #14,806 | 5.8% |
| Count | 1,855 | 1,923 | 3.7% |
| Per 100K | 0.63 | 0.64 | 2.1% |
Between the 2010 and 2020 Census, the number of Fitzsimons bearers went from 1,855 to 1,923 (+3.7% change). The surname moved up 913 positions in the national ranking, going from #15,719 to #14,806.
FAQ
Fitzsimons surname: questions and answers
How many people in the U.S. have the surname Fitzsimons?
Name Census estimates that about 2,205 living Americans carry the surname Fitzsimons. Using the current population baseline, that works out to roughly 1 in 155,444 residents.
How common is Fitzsimons?
Fitzsimons ranks #14,806 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 0.64 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 1,923 people with the surname Fitzsimons. That is different from the site's living-bearer estimate (2,205), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.64 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.64 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 Fitzsimons.
Has Fitzsimons become more or less common over time?
Between 2010 and 2020, the surname Fitzsimons went from 1,855 recorded bearers to 1,923. That is an increase of 68 (+3.7%). In the national ranking it rose from #15,719 to #14,806.
What does the Census say about the background of Fitzsimons?
Among Census respondents with the surname Fitzsimons, the largest self-reported group is White at 92.8%. The next largest groups are Hispanic (3.2%) and Two or More Races (2.7%). 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 Fitzsimons in the 2020 Census, accounting for 92.8% (1,784 people in the source table).
What is the full ancestry breakdown?
Fitzsimons appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.8%), Hispanic (3.2%), Two or More Races (2.7%). 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 Fitzsimons (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 Fitzsimons mean?
Son of Simons, referring to a patronymic surname. 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 Fitzsimons (0.64 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 share the surname Fitzsimons?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.