The Costanzo surname
In the 2010 U.S. Census, 5,970 people carried this name — #5,794 among all U.S. surnames, about 1 in every 49,500 people counted. That is up 1% from 5,928 in 2000.
In Argentina’s national register
At least 2,990 people named Costanzo 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 France’s civil register
France’s register of deaths holds 373 people named Costanzo.
Most of them — 213 — were born outside France. Those born in France came from 22 départements, most often Bouches-du-Rhône.
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 Switzerland’s population statistics
278 people named Costanzo live in Switzerland.
They live in 17 of Switzerland’s 26 cantons, most of all in Zurich.
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 Belgium’s population register
At least 66 people named Costanzo 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 Hainaut.
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 the Nordic population registers
26 people named Costanzo 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).
In print
Costanzo in American newspapers,
1907–1963.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 2,127 pages in all carry the name.
Who carried it
People named Costanzo,
with a public archive behind them.
-
Camillus Costanzo 1571–1622 · missionary -
Salvador Costanzo 1804–1869 · writer -
Giuseppe Aurelio Costanzo 1843–1913 · poet -
Jack Costanzo 1919–2018 · musician -
Roberto Costanzo 1929– · politician
Wikidata and Wikimedia Commons (CC0) · 104 lives in all are documented under this name.
Nearby in the index
Surnames next to Costanzo.
- Cossu 164 · U.S. census
- Costa 38,265 · U.S. census
- Costagliola 430 · U.S. census
- Costantini 694 · U.S. census
- Costantino 3,388 · U.S. census
- Costanza 3,137 · U.S. census
- Coste 764 · U.S. census
- Costella 378 · U.S. census
- Coster 1,646 · U.S. census
- Costes 256 · U.S. census
- Costi 132 · U.S. census
- Coston 4,969 · U.S. census
When the index is not enough
This page says where Costanzo 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.