The Theiss surname
In the 2010 U.S. Census, 2,619 people carried this name — #11,940 among all U.S. surnames, about 1 in every 112,400 people counted. That is up 1% from 2,595 in 2000.
In France’s civil register
France’s register of deaths holds 68 people named Theiss.
7 of them were born outside France. Those born in France came from 17 départements, most often Paris.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where 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 43 people named Theiss 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 Liège.
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
25 people named Theiss have a registered home in Poland.
Of the 40 in Poland’s national register, these are the ones with a permanent address on file. They live in 4 of Poland’s 16 voivodeships, most of all in Kuyavian-Pomeranian.
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 Switzerland’s population statistics
22 people named Theiss live in Switzerland.
They live in 4 of Switzerland’s 26 cantons, most of all in Basel-Stadt.
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.
In print
Theiss in American newspapers,
1912–1918.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 9,216 pages in all carry the name.
Who carried it
People named Theiss,
with a public archive behind them.
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Siegfried Theiss 1882–1963 · architect -
Christian Theiss 1802–1873 · politician
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Philipp Theiss sen. 1815–1884 · master builder
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Johann Philipp Theiss jun. 1847–1899 · master builder
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Mary Bartol Theiss 1875–1938
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Lewis Edwin Theiss 1878–1963 · writer
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Theiss.
- The 351 · U.S. census
- Theard 532 · U.S. census
- Thebaud 199 · U.S. census
- Theil 479 · U.S. census
- Theis 6,425 · U.S. census
- Theisen 5,707 · U.S. census
- Thelemaque 339 · U.S. census
- Thelin 350 · U.S. census
- Theo 207 · U.S. census
- Theobald 4,300 · U.S. census
- Theodore 4,601 · U.S. census
- Theodule 235 · U.S. census
When the index is not enough
This page says where Theiss 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.