How many Thomas Armstrong census records do you have?

We have 3929 US Census records for Thomas Armstrong, from 1900 to 1950, across 50 states and DC.

What's in a Thomas Armstrong census record?

You'll see Thomas's age, birthplace, occupation, and relationship to the head of household — plus everyone else who lived in the same home. For 1940 and 1950 records, you can also view the original handwritten census page.

How do I use census records for family research?

Census records are a snapshot of a family every 10 years. You can follow Thomas Armstrong's household over time — see when children appear, when people move states, and who's living together. YourRoots connects census data with Tree Matching and AI tools so you can build out your tree faster.

Are Thomas Armstrong census records free?

Yes. All Thomas Armstrong census records on YourRoots are free to search and view — no subscription required. We built our own index from the original federal census images.

Which census years and states cover Thomas Armstrong?

We have Thomas Armstrong records from the 1900 through 1950 US Federal Census, across 50 states and DC. Use the year and state filters to narrow your results.

How do I find Thomas Armstrong in the census?

Start by narrowing the year and state. If you know an approximate birth year, use the age column to match — census age minus the census year gives you a birth year estimate. Household members, birthplace, and occupation help confirm you have the right person.

What is the Model Tree for Thomas Armstrong?

The Model Tree is YourRoots' unique feature that links a person across multiple census decades and reconstructs their likely family — parents, siblings, spouse, and children — based on household patterns. It turns isolated records into a connected family network.

Where does the census data come from?

All records originate from the US Federal Census microfilm digitized by NARA (National Archives and Records Administration). YourRoots re-indexed the original page images using modern AI, catching names and details that older transcriptions missed.

Thomas Armstrong — US Census Records & Model Tree

We found 3929 free census records for Thomas Armstrong across 6 census years (1900–1950), in 50 states and DC and 1040 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

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Showing of 3929 records for Thomas Armstrong US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Thomas J. Armstrong	42	Schuyler-County, Illinois	Illinois	Farmer	Head
1940	Thomas Armstrong	21	Kandiyohi-County, Minnesota	Minnesota	Meat Cutter Helper	Son
1940	Thomas J. Armstrong	21	Philadelphia-County, Pennsylvania	Pennsylvania	Bus Boy	Son
1930	Thomas V. Armstrong		Mercer, Pennsylvania	Pennsylvania	Teller	Son
1930	Thomas J. Armstrong		Blount, Alabama	Alabama	Farm Laborer	Son
1940	Thomas Armstrong	41	Cook-County, Illinois	Illinois	Automobile Salesman	Head
1940	Thomas Armstrong	43	Camden-County, New Jersey	New Jersey	Air Brake Inspector	Head
1920	Thomas Armstrong		Pembina, North Dakota	Canada	Farmer	Head
1940	Thomas S. Armstrong	56	Montgomery-County, Pennsylvania	Ireland	Gardener	Head
1930	Thomas E. Armstrong		Allegheny, Pennsylvania	Pennsylvania	Retired	Head
1940	Thomas Armstrong	50	Liberty-County, Montana	Scotland	Farmer	Head
1940	Thomas A. Armstrong	56	Los-Angeles-County, California	Wisconsin	Salesman	Head
1920	Thomas Armstrong		Clackamas, Oregon	Oregon	Farmer	Head
1920	Thomas Armstrong		Sweet Grass, Montana	New York	Merchant	Head
1930	Thomas A. Armstrong		Guilford, North Carolina	Ireland	Salesman	Head
1930	Thomas G Armstrong		Allegheny, Pennsylvania	Pennsylvania	Salesman	Head
1920	Thomas Armstrong		Nevada, Arkansas	Arkansas	—	Son
1920	Thomas Armstrong		Keokuk, Iowa	Pennsylvania	Farmer	Head
1940	Thomas Armstrong	22	Harris-County, Georgia	Georgia	Truck Driver	Son
1940	Thomas Armstrong	44	Dutchess-County, New York	England	Dental Technician	Head
1910	Thomas M. Armstrong		Guernsey, Ohio	Ohio	—	Son
1940	Thomas J. Armstrong	11	Dutchess-County, New York	New York	—	Son
1910	Thomas H. Armstrong		Culpeper, Virginia	Virginia	Farmer	Son
1930	Thomas Armstrong		Hudson, New Jersey	New York	Iron Worker	Head
1940	Thomas Armstrong	21	Broome-County, New York	New York	Serviceman	Son
1930	Thomas E Armstrong		Spartanburg, South Carolina	South Carolina	Farmer	Head
1940	Thomas Armstrong	10	York-County, South Carolina	South Carolina	—	Son
1940	Thomas A Armstrong	12	Otsego-County, New York	New York	—	Son
1940	Thomas Armstrong	16	Hamilton-County, Ohio	Ohio	New Worker	Son
1930	Thomas Armstrong		Louisa, Virginia	Virginia	Farmer	Head

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About Thomas Armstrong US Census Records & Model Tree

We've indexed 3929 free, proprietary US Census records for Thomas Armstrong across 1900–1950, covering 50 states and DC: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming.

Each record includes our Model Tree — a longitudinal reconstruction that links the same person across census decades using machine learning (XGBoost record linkage). Every link carries a confidence score: Verified (≥0.99), Confirmed (≥0.95), or Linked (lower confidence). This tells you not just what the census says, but how reliably we've connected records across time.

Every record also shows the full household — who Thomas lived with, their ages, birthplaces, and occupations. For 1940 and 1950 records, you can view the original handwritten census page from the National Archives.

How we build the Model Tree. YourRoots independently indexes US Census records from NARA microfilm and links persons across decades using XGBoost-based record linkage. Each link's confidence is a per-pair match score from the model. Household corroboration (co-residents appearing on the same census pages in multiple years) strengthens the signal. The Model Tree is not a family tree submitted by users — it's reconstructed from the census data itself.

Last updated: July 30, 2026

Frequently Asked Questions

: We have 3929 US Census records for Thomas Armstrong, from 1900 to 1950, across 50 states and DC.
: You'll see Thomas's age, birthplace, occupation, and relationship to the head of household — plus everyone else who lived in the same home. For 1940 and 1950 records, you can also view the original handwritten census page.
: Census records are a snapshot of a family every 10 years. You can follow Thomas Armstrong's household over time — see when children appear, when people move states, and who's living together. YourRoots connects census data with Tree Matching and AI tools so you can build out your tree faster.
: Yes. All Thomas Armstrong census records on YourRoots are free to search and view — no subscription required. We built our own index from the original federal census images.
: We have Thomas Armstrong records from the 1900 through 1950 US Federal Census, across 50 states and DC. Use the year and state filters above to narrow your results.
: Start by narrowing the year and state. If you know an approximate birth year, use the age column to match — census age minus the census year gives you a birth year estimate. Household members, birthplace, and occupation help confirm you have the right person.
: The Model Tree is YourRoots' unique feature that links a person across multiple census decades and reconstructs their likely family — parents, siblings, spouse, and children — based on household patterns. It turns isolated records into a connected family network.
: All records originate from the US Federal Census microfilm digitized by NARA (National Archives and Records Administration). YourRoots re-indexed the original page images using modern AI, catching names and details that older transcriptions missed.

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