How many William Warren census records do you have?

We have 8939 US Census records for William Warren, from 1900 to 1950, across 50 states and DC.

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

Yes. All William Warren 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 Warren?

We have William Warren 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 William Warren 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 Warren?

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 Warren — US Census Records & Model Tree

We found 8939 free census records for William Warren across 6 census years (1900–1950), in 50 states and DC and 1658 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 8939 records for William Warren US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	William Warren	24	Stark-County, Ohio	Ohio	Clerk	Son
1940	William Warren	24	Prentiss-County, Mississippi	Mississippi	Laborer	Son
1940	William Warren	30	Marion-County, Mississippi	Mississippi	Teacher	Son
1940	William Warren	32	Mercer-County, New Jersey	New Jersey	Electrician	Son
1920	William Warren		Sussex, Delaware	Delaware	None	Son
1940	William Warren	23	Westchester-County, New York	New York	Secretary	Son
1940	William A. Warren	23	Ramsey-County, Minnesota	Minnesota	Clerk & Traffic Dept	Son
1940	William Warren	22	Wexford-County, Michigan	Michigan	Farmer	Son
1940	William H Warren	24	Grays-Harbor-County, Washington	Washington	New Worker	Son
1930	William R. Warren		Crockett, Tennessee	Tennessee	Merchant	Head
1920	William B Warren		Buncombe, North Carolina	North Carolina	Farmer	Head
1920	William Warren		Charles, Maryland	Maryland	Farmer	Head
1920	William Warren		Nash, North Carolina	North Carolina	Farmer	Head
1920	William L. Warren		Conway, Arkansas	Tennessee	Farmer	Head
1920	William J Warren		Chesterfield, Virginia	Virginia	Farmer	Head
1930	William E Warren		Henrico, Virginia	Virginia	Tinner	Head
1940	William Jr Warren	13	Hancock-County, Georgia	Georgia	—	Son
1940	William Warren	18	Southampton-County, Virginia	Virginia	Farming	Son
1930	William Warren		Clay, Iowa	Iowa	—	Son
1940	William Warren	25	Middlesex-County, Massachusetts	Massachusetts	Blueprint	Son
1940	William Warren	12	Shannon-County, Missouri	Missouri	—	Son
1930	William F Warren		Laurens, Georgia	Georgia	Labour	Son
1910	William Warren		Knox, Maine	Maine	Quarryman	Head
1910	William Warren		Hempstead, Arkansas	Arkansas	—	Son
1920	William Warren		Wayne, North Carolina	North Carolina	—	Son
1930	William A Warren		Neshoba, Mississippi	Mississippi	—	Son
1910	William Warren		Hinds, Mississippi	Mississippi	Laborer	Head
1920	William Warren		Fulton, Kentucky	Tennessee	—	Son
1940	William Warren	18	Fayette-County, Kentucky	Kentucky	Laborer	Son
1940	William Warren	58	Upshur-County, Texas	Texas	Farmer	Head

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About William Warren US Census Records & Model Tree

We've indexed 8939 free, proprietary US Census records for William Warren 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 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 8939 US Census records for William Warren, from 1900 to 1950, across 50 states and DC.
: 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 Warren'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 Warren 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 Warren 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.