The Dias surname
In the 2010 U.S. Census, 16,044 people carried this name — #2,266 among all U.S. surnames, about 1 in every 18,400 people counted. That is up 16% from 13,847 in 2000.
In Argentina’s national register
At least 6,768 people named Dias 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.
Where it concentrates, on the mapWhere they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
In Switzerland’s population statistics
4,172 people named Dias live in Switzerland.
They live in all 26 of Switzerland’s cantons, most of all in Vaud.
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 1,345 people named Dias.
Most of them — 720 — were born outside France. Those born in France came from 83 départements, most often Paris.
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 137 people named Dias 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.
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 Poland’s population register
118 people named Dias have a registered home in Poland.
Of the 173 in Poland’s national register, these are the ones with a permanent address on file. They live in 6 of Poland’s 16 voivodeships, most of all in Warmian-Masurian.
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 the Nordic population registers
66 people named Dias is counted in Sweden.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published.
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).
Who carried it
People named Dias,
with a public archive behind them.
-
Diogo Dias 1450–1500 · explorer -
Bartolomeu Dias 1467–1500 · explorer -
Gaspar Dias 1600–1671 · painter -
Diniz Rodrigues Dias, primeiro e único Barão de São Jacó 1825–1892 -
José Dias Ferreira 1837–1909 · writer
Wikidata and Wikimedia Commons (CC0) · 233 lives in all are documented under this name.
Nearby in the index
Surnames next to Dias.
When the index is not enough
This page says where Dias 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.