Flach surname: U.S. census count, rank and records | FamilyCrests

The Flach surname

In the 2010 U.S. Census, 1,471 people carried this name — #18,685 among all U.S. surnames, about 1 in every 200,000 people counted. That is up 13% from 1,306 in 2000.

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In Switzerland’s population statistics

250 people named Flach live in Switzerland.

They live in 11 of Switzerland’s 26 cantons, most of all in Zurich.

Where it concentrates, on the map

Where they live today

Zurich 110
Vaud 35
Bern 26
Basel-Stadt 16
Thurgau 14
Aargau 12
Basel-Landschaft 12
Zug 10

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 Argentina’s national register

At least 104 people named Flach 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 Misiones.

Too few records to say where it concentrates region by region — these are plain counts, not shares.

Where they live today

Misiones 68
La Pampa 36

RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.

In France’s civil register

France’s register of deaths holds 101 people named Flach.

11 of them were born outside France. Those born in France came from 16 départements, most often Bas-Rhin.

Too few records to say where it concentrates region by region — these are plain counts, not shares.

Where they were born

Born outside France 11
Bas-Rhin 43
Moselle 14
Paris 7
Corsica 5
Yvelines 5
Nord 4
Isère 3
Somme 1

Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.

In Poland’s population register

60 people named Flach have a registered home in Poland.

Of the 74 in Poland’s national register, these are the ones with a permanent address on file. They live in 5 of Poland’s 16 voivodeships, most of all in Lesser Poland.

Too few records to say where it concentrates region by region — these are plain counts, not shares.

Where they live today

Lesser Poland 23
Silesian 13
Lower Silesian 11
Masovian 9
Pomeranian 4

PESEL register, Ministry of Digital Affairs of Poland (dane.gov.pl) — CC0 · living people by voivodeship of permanent residence, 20 January 2026.

In the Nordic population registers

145 people named Flach is counted in Sweden.

Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published.

Counted, by country

Sweden (2022) 145

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).

Who carried it

People named Flach,
with a public archive behind them.

  • Martin Flach
    Martin Flach 1440–1514 · bookseller
  • Jacob Flach
    Jacob Flach 1537–1611 · physician
  • Hans Conrad Flach d. 1682 · bell founder
  • Martin Flach der Ältere 1440–1500 · printer
  • Martin Flach der Jüngere 1475–1539 · printer
  • Georg Flach 1505–1564 · bishop

Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.

Nearby in the index

Surnames next to Flach.

When the index is not enough

This page says where Flach 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.

See what a volume holds
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