The Quach surname
In the 2010 U.S. Census, 9,894 people carried this name — #3,598 among all U.S. surnames, about 1 in every 29,900 people counted. That is up 30% from 7,624 in 2000.
In France’s civil register
France’s register of deaths holds 156 people named Quach.
Most of them — 147 — were born outside France. Those born in France came from 6 départements, most often Val-d’Oise.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
In Switzerland’s population statistics
75 people named Quach live in Switzerland.
They live in 8 of Switzerland’s 26 cantons, most of all in Bern.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Swiss Federal Statistical Office (FSO), «Surnames of the permanent resident population by canton», 2025, opendata.swiss/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.
In Poland’s population register
25 people named Quach have a registered home in Poland.
Of the 50 in Poland’s national register, these are the ones with a permanent address on file. They live in 2 of Poland’s 16 voivodeships, most of all in Masovian.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
PESEL register, Ministry of Digital Affairs of Poland (dane.gov.pl) — CC0 · living people by voivodeship of permanent residence, 20 January 2026.
In Belgium’s population register
At least 21 people named Quach live in Belgium.
Statbel only publishes a name in a municipality when five or more people there share it, so the real number is higher. Most of them live in Liège.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
In the Nordic population registers
216 people named Quach are counted in Sweden and Finland.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published. Finland counts its citizens, at home or abroad.
Counted, by country
Own calculations based on data from Statistics Sweden (SCB), surnames with at least two bearers, 31 December 2022 — CC BY 4.0 (names with 20 or more bearers shown) · Digital and Population Data Services Agency (DVV), Finland, surname statistics, August 2026 — CC BY 4.0.
In print
Quach in American newspapers,
1904–1945.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 276 pages in all carry the name.
Who carried it
People named Quach,
with a public archive behind them.
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Caroline Quach-Thanh 1972– · researcher -
Anne Minh-Thu Quach 1982– · politician -
Danh Quach 1939–
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Helen Quach 1940–2013 · conductor
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Thai Quach 1991– · politician
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Flemming Quach 1992– · badminton player
Wikidata and Wikimedia Commons (CC0) · 22 lives in all are documented under this name.
Nearby in the index
Surnames next to Quach.
- Putman 9,058 · U.S. census
- Putz 2,033 · U.S. census
- Puzo 243 · U.S. census
- Py 204 · U.S. census
- Pyron 1,672 · U.S. census
- Pytel 676 · U.S. census
- Quadri 1,084 · U.S. census
- Quadrini 164 · U.S. census
- Quaglia 623 · U.S. census
- Quaglieri 167 · U.S. census
- Quaglino 122 · U.S. census
- Quaglio 101 · U.S. census
When the index is not enough
This page says where Quach is.
A volume says what happened to it.
Every page in the index is free and stays free. The Heritage Volume is the long form: the full paper trail, the arms, the crossing — bound, and yours.