# Flach (surname)

Source: https://namelineage.com/surname/flach/  
Publisher: Name Lineage. Counts from the US Census Bureau; origin and etymology from Wiktionary; bearers from Wikidata. Data updated 2026-11-11.

A surname.

| Field | Value |
|---|---|
| Origin | Czech |
| Type | not recorded |
| People in the US (2010 Census) | 1,471 |
| US rank (2010) | 18,685 of 162,253 |
| How often | about 1 in every 209,888 people |
| Change since 2000 | +13% (1,306 in 2000) |
| Pronunciation | not recorded |
| Variant spellings | none recorded |

## Etymology

* As a German surname, from Czech Vlach (“foreigner”). * Also as a German surname, from the adjective Flach (“flat”), see the German entry below. * Also as a German surname, from Middle High German vlach (“smooth, straight”). This is also borrowed into Czech.

## Who carries it

Share of people named Flach in the 2010 US Census by the Census's own race and ethnicity groups. The Census suppresses a share when the count behind it is small.

| Group | Share |
|---|---|
| White (not Hispanic) | 95% |
| Hispanic or Latino (any race) | 2.6% |
| Asian and Pacific Islander | 0.7% |
| Two or more races | 1.2% |

## Where

Wikidata records people named Flach in Brazil.

## People named Flach

- Jacinto Inácio Flach, Brazilian bishop

## Similar surnames

Flack, Flax, Flesch, Felix, Falk, Faulk, Fleck, Fellows, Flick, Falls, Flagg, Folk.

## How to read these numbers

A Census count is people alive and counted in 2010, not births, and names occurring fewer than 100 times are not published at all. Ethnicity shares are the Census's own categories.