2000
#6,757
National surname rank
Recorded bearers 4,597
First available Census row
Per 100,000 1.70
Rare Last name
Mccaslin
An Anglicized form of the Gaelic surname Mac Caislin, meaning "son of Caislin," a diminutive of the name Cas.
According to the 2020 US Census Bureau surname tables, roughly 5,103 Americans carry the last name Mccaslin. That puts it at #7,233 in the national surname ranking, appearing at a frequency of 1.49 per 100,000 people (about 1 in 67,167 residents).
This page is the full Name Census profile for the Mccaslin 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
5.1K
1 in 67,167
Census rank
#7,233
2020 decennial data
Per 100,000
1.5
Frequency rate
Recorded bearers
4.5K
rare in the US
Popularity narrative
The Census Bureau recorded 4,450 bearers of the surname Mccaslin in its 2020 decennial surname file. At a rate of 1.49 per 100,000 residents, it holds the 7233rd position in the national surname ranking.
Among Census respondents with the surname Mccaslin, the largest self-reported group is White at 88.0%. The next largest groups are Hispanic (4.3%) and Two or More Races (4.1%).
Origin
Meaning and origin of Mccaslin
The surname McCaslin is of Scottish origin, derived from the Gaelic Mac Aisling, which means "son of the dream or vision." This patronymic name is believed to have originated in the Highlands of Scotland, particularly in the regions of Argyll and the Isles, in the 13th or 14th century.
One of the earliest recorded instances of the name can be found in the Exchequer Rolls of Scotland from the late 14th century, where it appears as "MacAisling." Over time, the spelling evolved to reflect the anglicized version, McCaslin.
The name gained prominence in the Scottish Highlands, where the McCaslin clan played a significant role in the clan wars and struggles for power during the 16th and 17th centuries. The McCaslins were known for their involvement in various battles and conflicts, including the Battle of Glenlivet in 1594.
In the late 17th century, the McCaslin name appeared in the Hearth Tax Rolls of Argyllshire, indicating their presence in the region. One notable figure from this period was John McCaslin, born around 1650, who was a prominent landowner and chieftain of the McCaslin clan.
As the Scottish diaspora spread across the world, the McCaslin name traveled with it. In the 18th century, several McCaslins emigrated to the American colonies, settling in various regions, including Virginia, North Carolina, and Pennsylvania. One of the earliest recorded McCaslins in America was William McCaslin, born in 1725 in Virginia.
Another notable figure was Robert McCaslin, born in 1770 in North Carolina, who served as a militia captain during the American Revolutionary War. He later became a successful farmer and landowner in Tennessee.
In the 19th century, the McCaslin name continued to gain prominence in various fields. John McCaslin, born in 1812 in Indiana, was a renowned Baptist minister and educator who founded several educational institutions.
Additionally, James McCaslin, born in 1845 in Ohio, was a prominent businessman and industrialist who played a significant role in the growth of the steel industry in the United States.
Throughout history, the McCaslin surname has been carried by individuals from diverse backgrounds and professions, each contributing to the rich tapestry of the name's legacy.
Demographics
Ancestry and ethnicity for Mccaslin
Among Census respondents with the surname Mccaslin, the largest self-reported group is White at 88.0%. The next largest groups are Hispanic (4.3%) and Two or More Races (4.1%).
The bar chart below shows how Mccaslin 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 Mccaslin surname at the time of the 2020 Census, not any inherent property of the name itself.
- White88.0% · 3,915
- Hispanic or Latino4.3% · 193
- Two or more races4.1% · 184
- Black or African American1.6% · 71
- American Indian and Alaska Native1.3% · 57
- Asian and Pacific Islander0.7% · 30
Timeline
Historical Census data for Mccaslin
Mccaslin 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
#7,106
National surname rank
Recorded bearers 4,709
+112 bearers (+2.4%)
Per 100,000 1.60
Rank movement Down 349 places
2020
#7,233
National surname rank
Recorded bearers 4,450
-259 bearers (-5.5%)
Per 100,000 1.49
Rank movement Down 127 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #6,757 | 4,597 | 1.70 | First available Census row | First available Census row |
| 2010 | #7,106 | 4,709 | 1.60 | +112 bearers (+2.4%) | Down 349 places |
| 2020 | #7,233 | 4,450 | 1.49 | -259 bearers (-5.5%) | Down 127 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 Mccaslin 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 | #7,106 | #7,233 | -1.8% |
| Count | 4,709 | 4,450 | -5.5% |
| Per 100K | 1.60 | 1.49 | -6.9% |
Between the 2010 and 2020 Census, the number of Mccaslin bearers went from 4,709 to 4,450 (-5.5% change). The surname moved down 127 positions in the national ranking, going from #7,106 to #7,233.
FAQ
Mccaslin surname: questions and answers
How many people in the U.S. have the surname Mccaslin?
Name Census estimates that about 5,103 living Americans carry the surname Mccaslin. Using the current population baseline, that works out to roughly 1 in 67,167 residents.
How common is Mccaslin?
Mccaslin ranks #7,233 in the 2020 Census surname tables and is classified on this site as "Rare." The Census recorded the name at a frequency of 1.49 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 4,450 people with the surname Mccaslin. That is different from the site's living-bearer estimate (5,103), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 1.49 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 1.49 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 Mccaslin.
Has Mccaslin become more or less common over time?
Between 2010 and 2020, the surname Mccaslin went from 4,709 recorded bearers to 4,450. That is a decrease of 259 (-5.5%). In the national ranking it fell from #7,106 to #7,233.
What does the Census say about the background of Mccaslin?
Among Census respondents with the surname Mccaslin, the largest self-reported group is White at 88.0%. The next largest groups are Hispanic (4.3%) and Two or More Races (4.1%). 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 Mccaslin in the 2020 Census, accounting for 88.0% (3,915 people in the source table).
What is the full ancestry breakdown?
Mccaslin appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (88.0%), Hispanic (4.3%), Two or More Races (4.1%). 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 Mccaslin (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 Mccaslin mean?
An Anglicized form of the Gaelic surname Mac Caislin, meaning "son of Caislin," a diminutive of the name Cas. 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 Mccaslin (1.49 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 Mccaslin?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.