The Roos surname
In the 2010 U.S. Census, 5,051 people carried this name — #6,690 among all U.S. surnames, about 1 in every 58,500 people counted. About the same as in 2000 (5,072).
In Switzerland’s population statistics
2,593 people named Roos live in Switzerland.
They live in all 26 of Switzerland’s cantons, most of all in Lucerne.
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 1,142 people named Roos.
67 of them were born outside France. Those born in France came from 61 départements, most often Bas-Rhin.
Where it concentrates, on the mapWhere they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
In Belgium’s population register
At least 725 people named Roos 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 East Flanders.
Where it concentrates, on the mapWhere they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
In Poland’s population register
34 people named Roos have a registered home in Poland.
Of the 79 in Poland’s national register, these are the ones with a permanent address on file. They live in 7 of Poland’s 16 voivodeships, most of all in Silesian.
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 Argentina’s national register
At least 25 people named Roos 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 Buenos Aires Province.
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.
In the Nordic population registers
8,239 people named Roos are counted in Sweden, Finland and Norway.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published. Norway publishes only surnames with 200 or more bearers. 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) · Statistics Norway (SSB, ssb.no), table 12891, 2025 — CC BY 4.0 · Digital and Population Data Services Agency (DVV), Finland, surname statistics, August 2026 — CC BY 4.0.
In print
Roos in American newspapers,
1859–1955.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 597,950 pages in all carry the name.
Who carried it
People named Roos,
with a public archive behind them.
-
Johann Heinrich Roos 1631–1685 · painter -
Theodor Roos 1638–1687 · painter -
Philipp Peter Roos 1657–1706 · artist -
Axel Erik Roos 1684–1765 · military personnel -
Joseph Roos 1726–1805 · painter
Wikidata and Wikimedia Commons (CC0) · 205 lives in all are documented under this name.
Nearby in the index
Surnames next to Roos.
- Roney 6,015 · U.S. census
- Rongione 153 · U.S. census
- Ronin 136 · U.S. census
- Ronne 309 · U.S. census
- Ronsse 122 · U.S. census
- Room 157 · U.S. census
- Roose 2,119 · U.S. census
- Roosen 228 · U.S. census
- Roost 110 · U.S. census
- Roper 20,065 · U.S. census
- Ropers 127 · U.S. census
- Ropp 2,270 · U.S. census
When the index is not enough
This page says where Roos 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.