The Rio surname
In the 2010 U.S. Census, 1,581 people carried this name — #17,726 among all U.S. surnames, about 1 in every 185,200 people counted. That is up 8% from 1,458 in 2000.
In France’s civil register
France’s register of deaths holds 4,105 people named Rio.
59 of them were born outside France. Those born in France came from 75 départements, most often Morbihan.
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 Argentina’s national register
At least 1,819 people named Rio 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
48 people named Rio live in Switzerland.
They live in 6 of Switzerland’s 26 cantons, most of all in Zurich.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where 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.
Who carried it
People named Rio,
with a public archive behind them.
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Emmanuel Rio 1810– · gardener -
Alphonse Rio 1873–1949 · politician -
Roger Rio 1913–1999 · association football player -
Alexis-François Rio 1797–1874 · writer
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François Rio 1829– · politician
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Rosa Rio 1902–2010 · organist
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Rio.
- Ringenbach 194 · U.S. census
- Ringler 3,472 · U.S. census
- Ringo 2,596 · U.S. census
- Ringwald 765 · U.S. census
- Rinn 929 · U.S. census
- Rinner 276 · U.S. census
- Rion 673 · U.S. census
- Rios 127,794 · U.S. census
- Riou 116 · U.S. census
- Rioux 2,672 · U.S. census
- Ripoll 544 · U.S. census
- Ripp 1,779 · U.S. census
When the index is not enough
This page says where Rio 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.