2000
#1,674
National surname rank
Recorded bearers 19,607
First available Census row
Per 100,000 7.27
Uncommon Last name
Sizemore
An occupational surname for someone who made or sold a large quantity of goods.
According to the 2020 US Census Bureau surname tables, roughly 21,945 Americans carry the last name Sizemore. That puts it at #1,841 in the national surname ranking, appearing at a frequency of 6.40 per 100,000 people (about 1 in 15,619 residents).
This page is the full Name Census profile for the Sizemore 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
22K
1 in 15,619
Census rank
#1,841
2020 decennial data
Per 100,000
6.4
Frequency rate
Recorded bearers
19K
uncommon in the US
Popularity narrative
The Census Bureau recorded 19,137 bearers of the surname Sizemore in its 2020 decennial surname file. At a rate of 6.40 per 100,000 residents, it holds the 1841st position in the national surname ranking.
Among Census respondents with the surname Sizemore, the largest self-reported group is White at 89.0%. The next largest groups are Two or More Races (5.1%) and Black (2.4%).
Origin
Meaning and origin of Sizemore
The surname Sizemore is of English origin, with its roots tracing back to the Middle Ages. It is believed to have originated from the region of Gloucestershire, where it was likely derived from a place name or a descriptive term related to a person's occupation or physical characteristics.
One theory suggests that Sizemore may have evolved from a combination of the Old English words "sise" and "mor," meaning "ample" and "moor" respectively. This could indicate that the name was initially used to describe someone who lived on or near a large moor or heath.
Another possibility is that Sizemore was derived from the Old English word "sizer," which referred to a person responsible for measuring or assessing quantities, perhaps in a trade or agricultural setting. This occupational surname may have been given to someone who worked as a measurer or assessor.
While the name Sizemore does not appear in the Domesday Book, one of the earliest recorded instances can be found in the Pipe Rolls of Gloucestershire from 1195, where a person named Richard de Sysemore is mentioned. This spelling variation highlights the name's evolution over time.
In the 13th century, the surname Sizemore was also documented in various historical records, including the Hundred Rolls of Oxfordshire in 1273, where a certain William de Sysemore is listed.
One notable individual bearing the Sizemore surname was Sir John Sizemore (1471-1542), a prominent English politician and Member of Parliament during the reign of King Henry VIII. He served as Sheriff of Gloucestershire and was involved in the dissolution of monasteries in the region.
Another noteworthy figure was Thomas Sizemore (1555-1628), an English clergyman who served as the Bishop of Bristol from 1608 until his death. He played a significant role in the religious and political affairs of the time.
In the 17th century, the name Sizemore was also found in various parish records and court documents across England, indicating its continued use and spread throughout the country.
During the colonial era, several individuals with the Sizemore surname migrated to the Americas, contributing to the name's further dissemination. One such example is John Sizemore (1620-1698), an early settler in Virginia who established a prominent family lineage in the region.
Another notable individual was William Sizemore (1755-1832), a Virginia farmer and militia captain who fought in the American Revolutionary War. His descendants continued to carry on the Sizemore name in the United States.
Throughout its history, the surname Sizemore has undergone various spelling variations, including Sisemore, Sizemore, Sizemore, and Sysemore, reflecting the challenges of standardized spelling in earlier times. However, the name has endured and continues to be carried by individuals across the globe, with its origins deeply rooted in the rich history of England.
Demographics
Ancestry and ethnicity for Sizemore
Among Census respondents with the surname Sizemore, the largest self-reported group is White at 89.0%. The next largest groups are Two or More Races (5.1%) and Black (2.4%).
The bar chart below shows how Sizemore 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 Sizemore surname at the time of the 2020 Census, not any inherent property of the name itself.
- White89.0% · 17,030
- Two or more races5.1% · 982
- Black or African American2.4% · 468
- Hispanic or Latino2.3% · 446
- American Indian and Alaska Native0.7% · 127
- Asian and Pacific Islander0.4% · 84
Timeline
Historical Census data for Sizemore
Sizemore 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
#1,783
National surname rank
Recorded bearers 20,116
+509 bearers (+2.6%)
Per 100,000 6.82
Rank movement Down 109 places
2020
#1,841
National surname rank
Recorded bearers 19,137
-979 bearers (-4.9%)
Per 100,000 6.40
Rank movement Down 58 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #1,674 | 19,607 | 7.27 | First available Census row | First available Census row |
| 2010 | #1,783 | 20,116 | 6.82 | +509 bearers (+2.6%) | Down 109 places |
| 2020 | #1,841 | 19,137 | 6.40 | -979 bearers (-4.9%) | Down 58 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 Sizemore 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 | #1,783 | #1,841 | -3.3% |
| Count | 20,116 | 19,137 | -4.9% |
| Per 100K | 6.82 | 6.40 | -6.1% |
Between the 2010 and 2020 Census, the number of Sizemore bearers went from 20,116 to 19,137 (-4.9% change). The surname moved down 58 positions in the national ranking, going from #1,783 to #1,841.
Notable bearers
Famous people with the surname Sizemore
FAQ
Sizemore surname: questions and answers
How many people in the U.S. have the surname Sizemore?
Name Census estimates that about 21,945 living Americans carry the surname Sizemore. Using the current population baseline, that works out to roughly 1 in 15,619 residents.
How common is Sizemore?
Sizemore ranks #1,841 in the 2020 Census surname tables and is classified on this site as "Uncommon." The Census recorded the name at a frequency of 6.40 per 100,000 residents, which is about 6 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 19,137 people with the surname Sizemore. That is different from the site's living-bearer estimate (21,945), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 6.4 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 6.40 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 6 of them to have the surname Sizemore.
Has Sizemore become more or less common over time?
Between 2010 and 2020, the surname Sizemore went from 20,116 recorded bearers to 19,137. That is a decrease of 979 (-4.9%). In the national ranking it fell from #1,783 to #1,841.
What does the Census say about the background of Sizemore?
Among Census respondents with the surname Sizemore, the largest self-reported group is White at 89.0%. The next largest groups are Two or More Races (5.1%) and Black (2.4%). 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 Sizemore in the 2020 Census, accounting for 89.0% (17,030 people in the source table).
What is the full ancestry breakdown?
Sizemore appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (89.0%), Two or More Races (5.1%), Black (2.4%). 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 Sizemore (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 Sizemore mean?
An occupational surname for someone who made or sold a large quantity of goods. 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 Sizemore (6.40 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 Sizemore?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.