How many William Casey census records do you have?

We have 7089 US Census records for William Casey, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All William Casey 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 Casey?

We have William Casey 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 Casey 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 Casey?

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 Casey — US Census Records & Model Tree

We found 7089 free census records for William Casey across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1138 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 7089 records for William Casey US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	William Casey	36	Albany-County, New York	New York	Clerical	Son
1920	William Casey		Claiborne, Louisiana	Louisiana	—	Son
1930	William N Casey		Linn, Kansas	Kansas	—	Son
1940	William Casey	38	Middlesex-County, Massachusetts	Massachusetts	Soap Wrapper	Head
1940	William Casey	31	Middlesex-County, Massachusetts	Massachusetts	Operator	Head
1940	William Casey	32	Big-Stone-County, Minnesota	Minnesota	Farmer	Son
1940	William Casey	36	Queens-County, New York	England	Chauffeur	Head
1940	William F. Casey	35	Middlesex-County, Massachusetts	Massachusetts	Legal Department	Head
1940	William L Casey	64	Bronx-County, New York	Ohio	—	Head
1940	William M. Casey	60	Hinds-County, Mississippi	Mississippi	Salesman	Head
1920	William Casey		Essex, Massachusetts	Ireland	Coal Wharf	Head
1940	William S. Casey	70	Putnam-County, Illinois	Scotland	—	Head
1940	William Casey	56	Kings-County, New York	New York	Detective	Head
1920	William Casey		Spartanburg, South Carolina	South Carolina	Farmer	Head
1940	William E. Casey	70	Independence-County, Arkansas	Tennessee	Merchant	Head
1930	William Casey		Shannon, Missouri	Missouri	Farmer	Head
1940	William W. Casey	15	Gloucester-County, New Jersey	New Jersey	—	Son
1920	William Casey		Westchester, New York	New York	Miller	Son
1920	William B. Casey		Barbour, Alabama	Alabama	—	Head
1940	William Casey	13	Wayne-County, Michigan	Michigan	—	Son
1920	William Casey		Lackawanna, Pennsylvania	Pennsylvania	—	Son
1930	William Casey		New York, New York	New York	None	Son
1940	William Jr. Casey	12	Cayuga-County, New York	New York	—	Son
1920	William Casey		Luzerne, Pennsylvania	Pennsylvania	Laborer	Head
1940	William Casey	21	Suffolk-County, Massachusetts	Massachusetts	Laborer	Son
1920	William Casey		Allegheny, Pennsylvania	Pennsylvania	—	Son
1940	William F. Casey	12	Suffolk-County, Massachusetts	Massachusetts	None	Son
1920	William Casey		Dubuque, Iowa	Iowa	Laborer	Son
1930	William E. Casey		Providence, Rhode Island	Massachusetts	Plater	Head
1930	William J. Jr. Casey		Providence, Rhode Island	Rhode Island	—	Son

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About William Casey US Census Records & Model Tree

We've indexed 7089 free, proprietary US Census records for William Casey across 1900–1950, covering 50 states, DC, and 1 territory: 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, Puerto Rico, 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 7089 US Census records for William Casey, 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 Casey'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 Casey 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 Casey 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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