How many William Allen census records do you have?

We have 29641 US Census records for William Allen, from 1900 to 1950, across 50 states, DC, and 2 territories.

What's in a William Allen 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 Allen'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 Allen census records free?

Yes. All William Allen 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 Allen?

We have William Allen records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 2 territories. Use the year and state filters to narrow your results.

How do I find William Allen 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 Allen?

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 Allen — US Census Records & Model Tree

We found 29641 free census records for William Allen across 6 census years (1900–1950), in 50 states, DC, and 2 territories and 2485 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

William Allen Census Records by State & County

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Showing of 29641 records for William Allen US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	William Allen		Wake, North Carolina	North Carolina	Laborer	Head
1930	William A. Allen		Oregon, Missouri	Missouri	Farmer	Head
1940	William Allen	32	Caswell-County, North Carolina	North Carolina	Laborer	Head
1930	William S Allen		Johnson, Indiana	Indiana	Assembler	Son
1930	William Allen		Banks, Georgia	Georgia	None	Son
1930	William D Allen		Polk, Iowa	Iowa	Baker	Son
1930	William Allen		Wayne, Michigan	Scotland	Toolmaker	Son
1930	William N. Allen		Holmes, Florida	Alabama	Farmer	Head
1920	William T Allen		Bland, Virginia	Virginia	Farm Laborer	Son
1940	William Allen	26	Granville-County, North Carolina	North Carolina	Same Place	Head
1930	William H. Jr. Allen		Hamilton, Illinois	Illinois	Salesman	Son
1940	William Allen	34	Platte-County, Missouri	Missouri	Farmer	Head
1940	William O. Allen	25	Bibb-County, Georgia	Georgia	Truck Driver	Head
1940	William B Allen	21	Milwaukee-County, Wisconsin	Wisconsin	—	Son
1920	William Allen		Caddo, Louisiana	Louisiana	Presser	Son
1930	William R Allen		Johnston, North Carolina	North Carolina	Farmer	Son
1940	William R. Jr. Allen	36	New-Hanover-County, North Carolina	North Carolina	Sec-Treas.	Head
1940	William Allen	33	Mercer-County, Illinois	Wisconsin	Laborer	Son
1940	William Allen	22	Story-County, Iowa	Iowa	Typist	Son
1940	William W Allen	20	Baltimore-County, Maryland	Maryland	Attendant	Son
1920	William Allen		Johnston, North Carolina	North Carolina	—	Son
1930	William Allen		Bibb, Georgia	Georgia	—	Son
1910	William N. Allen		Smith, Tennessee	Tennessee	—	Son
1940	William C. Allen	62	Wilson-County, Kansas	Kansas	Driller	Son
1920	William H Allen		Monmouth, New Jersey	New Jersey	Signalman	Son
1930	William Allen		Marquette, Michigan	England	—	Head
1940	William H. Allen	64	Chaffee-County, Colorado	Missouri	Brick Layer	Head
1930	William E. Allen		Buncombe, North Carolina	North Carolina	Farmer	Head
1930	William S Allen		Bristol, Massachusetts	Massachusetts	Carpenter	Head
1930	William H Allen		Suffolk, Massachusetts	Maine	—	Head

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About William Allen US Census Records & Model Tree

We've indexed 29641 free, proprietary US Census records for William Allen across 1900–1950, covering 50 states, DC, and 2 territories: Alabama, Alaska, American Samoa, 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, U.S. Virgin Islands, 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 29641 US Census records for William Allen, from 1900 to 1950, across 50 states, DC, and 2 territories.
: 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 Allen'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 Allen 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 Allen records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 2 territories. 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.