2000
#4,305
National surname rank
Recorded bearers 7,624
First available Census row
Per 100,000 2.83
Uncommon Last name
Quach
A Vietnamese surname derived from the Chinese surname Guo, meaning "state" or "country."
According to the 2020 US Census Bureau surname tables, roughly 12,272 Americans carry the last name Quach. That puts it at #3,294 in the national surname ranking, appearing at a frequency of 3.58 per 100,000 people (about 1 in 27,930 residents).
This page is the full Name Census profile for the Quach 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 Quach with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
12K
1 in 27,930
Census rank
#3,294
2020 decennial data
Per 100,000
3.6
Frequency rate
Recorded bearers
11K
uncommon in the US
Popularity narrative
The Census Bureau recorded 10,702 bearers of the surname Quach in its 2020 decennial surname file. At a rate of 3.58 per 100,000 residents, it holds the 3294th position in the national surname ranking.
Among Census respondents with the surname Quach, the largest self-reported group is Asian/Pacific Islander at 96.1%. The next largest groups are Two or More Races (1.5%) and White (1.1%).
Origin
Meaning and origin of Quach
The surname Quach has its origins in Vietnam, where it first emerged during the medieval period. It is derived from the Vietnamese word "quách," which means "nest" or "home." This suggests that the name may have originally referred to someone who lived in a particular dwelling or came from a specific village or region.
One of the earliest recorded instances of the name Quach can be found in the Annals of Dai Viet, a historical text compiled in the 15th century. This work mentions a nobleman named Quach Ngan, who served as a high-ranking official during the reign of Emperor Tran Nhan Tong in the 13th century.
In the 16th century, there are records of a famous Vietnamese scholar and poet named Quach Quynh, who was born in 1510 and died in 1567. He is renowned for his contributions to Vietnamese literature and his efforts to preserve the country's cultural heritage.
Another notable figure with the surname Quach was Quach Thi Trang, a Vietnamese revolutionary who played a significant role in the struggle for independence against French colonial rule in the early 20th century. She was born in 1888 and died in 1973.
During the 17th and 18th centuries, the name Quach was often associated with certain place names in Vietnam, such as Quach Dinh, a village in the northern region of the country. This suggests that the surname may have originated from a specific geographic location.
In more recent times, one of the most prominent individuals with the surname Quach was Quach Van Oc, a Vietnamese artist and calligrapher who lived from 1939 to 2012. He was renowned for his expertise in traditional Vietnamese calligraphy and his efforts to promote this art form.
Another notable figure with the surname Quach was Quach Thi Ho, a Vietnamese writer and activist who was born in 1926. She was a prominent figure in the women's rights movement in Vietnam and wrote extensively on issues related to gender equality and social justice.
Demographics
Ancestry and ethnicity for Quach
Among Census respondents with the surname Quach, the largest self-reported group is Asian/Pacific Islander at 96.1%. The next largest groups are Two or More Races (1.5%) and White (1.1%).
The bar chart below shows how Quach 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 Quach surname at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander96.1% · 10,287
- Two or more races1.5% · 158
- White1.1% · 119
- Hispanic or Latino1.0% · 107
- Black or African American0.2% · 24
- American Indian and Alaska Native0.1% · 7
Timeline
Historical Census data for Quach
Quach 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
#3,598
National surname rank
Recorded bearers 9,894
+2,270 bearers (+29.8%)
Per 100,000 3.35
Rank movement Up 707 places
2020
#3,294
National surname rank
Recorded bearers 10,702
+808 bearers (+8.2%)
Per 100,000 3.58
Rank movement Up 304 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #4,305 | 7,624 | 2.83 | First available Census row | First available Census row |
| 2010 | #3,598 | 9,894 | 3.35 | +2,270 bearers (+29.8%) | Up 707 places |
| 2020 | #3,294 | 10,702 | 3.58 | +808 bearers (+8.2%) | Up 304 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 Quach 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 | #3,598 | #3,294 | 8.4% |
| Count | 9,894 | 10,702 | 8.2% |
| Per 100K | 3.35 | 3.58 | 6.9% |
Between the 2010 and 2020 Census, the number of Quach bearers went from 9,894 to 10,702 (+8.2% change). The surname moved up 304 positions in the national ranking, going from #3,598 to #3,294.
FAQ
Quach surname: questions and answers
How many people in the U.S. have the surname Quach?
Name Census estimates that about 12,272 living Americans carry the surname Quach. Using the current population baseline, that works out to roughly 1 in 27,930 residents.
How common is Quach?
Quach ranks #3,294 in the 2020 Census surname tables and is classified on this site as "Uncommon." The Census recorded the name at a frequency of 3.58 per 100,000 residents, which is about 4 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 10,702 people with the surname Quach. That is different from the site's living-bearer estimate (12,272), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 3.58 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 3.58 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 4 of them to have the surname Quach.
Has Quach become more or less common over time?
Between 2010 and 2020, the surname Quach went from 9,894 recorded bearers to 10,702. That is an increase of 808 (+8.2%). In the national ranking it rose from #3,598 to #3,294.
What does the Census say about the background of Quach?
Among Census respondents with the surname Quach, the largest self-reported group is Asian/Pacific Islander at 96.1%. The next largest groups are Two or More Races (1.5%) and White (1.1%). 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?
Asian/Pacific Islander is the largest self-reported group for the surname Quach in the 2020 Census, accounting for 96.1% (10,287 people in the source table).
What is the full ancestry breakdown?
Quach appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Asian/Pacific Islander (96.1%), Two or More Races (1.5%), White (1.1%). 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 Quach (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 Quach mean?
A Vietnamese surname derived from the Chinese surname Guo, meaning "state" or "country." 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 Quach (3.58 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 Quach?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.