How many William Armstrong census records do you have?

We have 10408 US Census records for William Armstrong, from 1900 to 1950, across 50 states, DC, and 1 territory.

What's in a William Armstrong census record?

You'll see William'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 William 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 William Armstrong census records free?

Yes. All William 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 William Armstrong?

We have William Armstrong records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find William 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 William 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.

William Armstrong — US Census Records & Model Tree

We found 10408 free census records for William Armstrong across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1659 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 10408 records for William Armstrong US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	William Armstrong		Gaston, North Carolina	North Carolina	—	Son
1940	William Armstrong	21	Montgomery-County, North Carolina	North Carolina	Helper	Son
1920	William H. Armstrong		Nash, North Carolina	North Carolina	—	Son
1940	William Armstrong	29	Champaign-County, Illinois	Illinois	Laborer	Head
1940	William Armstrong	30	Suffolk-County, Massachusetts	Massachusetts	Chauffeur	Head
1920	William M. Armstrong		Clackamas, Oregon	Oregon	Farmer	Son
1930	William B. Armstrong		Whitman, Washington	Washington	Farmer	Son
1940	William Armstrong	24	Sumner-County, Tennessee	Tennessee	Shoe Maker	Son
1930	William P. Armstrong		Mercer, New Jersey	Alabama	Prof.	Head
1930	William S. Armstrong		New Castle, Delaware	Delaware	Insurance Agent	Head
1940	William A Armstrong	39	Perquimans-County, North Carolina	North Carolina	Laborer	Head
1940	William Armstrong	52	Morris-County, New Jersey	New Jersey	Mason	Head
1940	William Armstrong	70	Salt-Lake-County, Utah	Australia	—	Head
1920	William J. Armstrong		Jefferson, Alabama	Alabama	Laborer	Head
1920	William T. Armstrong		Hood, Texas	Alabama	None	Head
1920	William T Armstrong		Franklin, Ohio	Ohio	Motorman	Head
1940	William Armstrong	63	Lawrence-County, Mississippi	Mississippi	Farmer	Head
1920	William Armstrong		Greene, Illinois	Missouri	Clerk	Head
1930	William Armstrong		Union, New Jersey	Ireland	Electrician	Head
1910	William H Armstrong		Franklin, Ohio	Ohio	Car Repairer	Head
1920	William Armstrong		Clinton, Michigan	Michigan	Farmer	Head
1940	William H. Armstrong	47	Tioga-County, New York	New York	Farmer	Head
1940	William Jr. Armstrong	17	Tioga-County, New York	New York	Laborer	Son
1930	William Armstrong		Washington, Maryland	Pennsylvania	Packer	Son
1930	William Fred Armstrong		Laclede, Missouri	Missouri	Farmer	Head
1940	William Armstrong	11	St.-Clair-County, Michigan	Michigan	—	Son
1940	William Armstrong	9	York-County, South Carolina	South Carolina	—	Son
1930	William A. Armstrong		Antelope, Nebraska	Nebraska	Farmer	Head
1910	William Armstrong		Mifflin, Pennsylvania	Pennsylvania	Farmer	Head
1930	William Armstrong		Cook, Illinois	Ohio	—	Son

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About William Armstrong US Census Records & Model Tree

We've indexed 10408 free, proprietary US Census records for William Armstrong across 1900–1950, covering 50 states, DC, and 1 territory: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, 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 William 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 10408 US Census records for William Armstrong, from 1900 to 1950, across 50 states, DC, and 1 territory.
: You'll see William'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 William 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 William 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 William Armstrong records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. 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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