How many William Flynn census records do you have?

We have 6834 US Census records for William Flynn, from 1900 to 1950, across 49 states, DC, and 1 territory.

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

Yes. All William Flynn 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 Flynn?

We have William Flynn records from the 1900 through 1950 US Federal Census, across 49 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find William Flynn 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 Flynn?

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 Flynn — US Census Records & Model Tree

We found 6834 free census records for William Flynn across 6 census years (1900–1950), in 49 states, DC, and 1 territory and 835 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 6834 records for William Flynn US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	William P Flynn	22	Suffolk-County, Massachusetts	Massachusetts	Draftsman	Son
1940	William L. Flynn	23	Allegheny-County, Pennsylvania	Pennsylvania	New Worker	Son
1940	William Flynn	36	Baltimore-City-County, Maryland	Maryland	Office Clerk	Son
1940	William P. Flynn	32	Cook-County, Illinois	Illinois	Presser	Head
1930	William J. Flynn		Campbell, Kentucky	Ohio	Cashier	Son
1940	William Flynn	21	New-York-County, New York	New York	—	Son
1940	William B Flynn	33	Providence-County, Rhode Island	Rhode Island	Patrolman	Son
1940	William Flynn	37	Bronx-County, New York	New York	Repair Switch	Head
1940	William J. Jr. Flynn	26	Cook-County, Illinois	Illinois	Employ. Mgr.	Head
1930	William A Flynn		Hamilton, Ohio	Ohio	Conductor	Head
1930	William Flynn		Kings, New York	New York	Salesman	Head
1910	William D. Flynn		Suffolk, Massachusetts	Ireland	Proprietor	Head
1930	William J. Flynn		Essex, Massachusetts	Massachusetts	Meat Cutter	Head
1920	William Flynn		Plymouth, Massachusetts	Massachusetts	Shoe Maker	Head
1930	William Flynn		Garfield, Colorado	Ireland	Farmer	Head
1940	William R. Flynn	70	Cambria-County, Pennsylvania	Pennsylvania	—	Head
1930	William Flynn		Berkshire, Massachusetts	Connecticut	Butcher	Head
1940	William Flynn	64	Sevier-County, Tennessee	Tennessee	Truck Driver	Head
1940	William Flynn	37	New-York-County, New York	New York	Manager	Head
1930	William F. Flynn		Bristol, Massachusetts	England	Policeman	Head
1940	William Flynn	53	Erie-County, New York	New York	Conductor	Head
1940	William Flynn	58	Cook-County, Illinois	Illinois	—	Head
1910	William Flynn		Middlesex, New Jersey	New Jersey	Captain	Head
1940	William Flynn	12	Kings-County, New York	New York	—	Son
1930	William J. Flynn		Providence, Rhode Island	Rhode Island	Belt Hand	Son
1930	William Flynn		Nassau, New York	New York	—	Son
1940	William Flynn	17	Luzerne-County, Pennsylvania	Pennsylvania	New Worker	Son
1940	William T. Flynn	23	St.-Louis-County, Missouri	Missouri	—	Son
1940	William J. Flynn	35	Lake-County, Indiana	Illinois	Mill Foreman	Head
1920	William Flynn		New York, New York	New York	Student	Son

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About William Flynn US Census Records & Model Tree

We've indexed 6834 free, proprietary US Census records for William Flynn across 1900–1950, covering 49 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, 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 6834 US Census records for William Flynn, from 1900 to 1950, across 49 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 Flynn'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 Flynn 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 Flynn records from the 1900 through 1950 US Federal Census, across 49 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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