The Boillat surname
In the 2010 U.S. Census, 147 people carried this name — #118,185 among all U.S. surnames, about 1 in every 2,000,000 people counted. That is up 30% from 113 in 2000.
In Switzerland’s population statistics
1,363 people named Boillat live in Switzerland.
They live in 15 of Switzerland’s 26 cantons, most of all in Jura.
Where it concentrates, on the mapWhere 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 France’s civil register
France’s register of deaths holds 96 people named Boillat.
37 of them were born outside France. Those born in France came from 17 départements, most often Doubs.
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 Argentina’s national register
At least 38 people named Boillat live in Argentina.
RENAPER only publishes a name in a province when more than ten people there share it, so the real number is higher. Most of them live in Córdoba.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
Who carried it
People named Boillat,
with a public archive behind them.
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Justin Boillat 1845–1914 · writer
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Justin Boillat 1854–1914 · writer
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Fernand Boillat 1906–1997
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Laurent Boillat 1911–1985 · engraver
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Joseph Boillat 1912–
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Marcel Boillat 1929–2020 · politician
Wikidata (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Boillat.
When the index is not enough
This page says where Boillat 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.