How many John Flaherty census records do you have?

We have 4368 US Census records for John Flaherty, from 1900 to 1950, across 47 states, DC, and 1 territory.

What's in a John Flaherty census record?

You'll see John'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 John Flaherty'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 John Flaherty census records free?

Yes. All John Flaherty 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 John Flaherty?

We have John Flaherty records from the 1900 through 1950 US Federal Census, across 47 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find John Flaherty 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 John Flaherty?

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.

John Flaherty — US Census Records & Model Tree

We found 4368 free census records for John Flaherty across 6 census years (1900–1950), in 47 states, DC, and 1 territory and 456 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Flaherty Census Records by State & County

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Showing of 4368 records for John Flaherty US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Flaherty	24	Schuylkill-County, Pennsylvania	Pennsylvania	—	Son
1940	John Flaherty	34	Bureau-County, Illinois	Illinois	Farm Laborer	Son
1940	John Flaherty	37	Marquette-County, Michigan	Louisiana	Merchant	Son
1940	John F. Flaherty	33	New-York-County, New York	New York	Bookkeeper	Son
1940	John A Flaherty	38	Bergen-County, New Jersey	New York	Salesman	Head
1940	John Flaherty	36	Philadelphia-County, Pennsylvania	Connecticut	Shipping Clerk	Head
1930	John J. Flaherty		Monroe, New York	Ireland	Service Man	Head
1940	John Flaherty	54	Allegheny-County, Pennsylvania	Ireland	Labor	Head
1940	John Flaherty	47	Allegheny-County, Pennsylvania	Ireland	Watchman	Head
1900	John J Flaherty	50	Suffolk, Massachusetts	Ireland	Carpenter	Head
1940	John J. Flaherty	57	Jefferson-County, Kentucky	Kentucky	Janitor	Head
1940	John S. Flaherty	76	Pike-County, Arkansas	Virginia	—	Head
1940	John Flaherty	67	Middlesex-County, Massachusetts	Ireland	Currier	Head
1940	John J. Flaherty	52	Androscoggin-County, Maine	Maine	Second Hand	Head
1940	John Flaherty	15	Kings-County, New York	New York	—	Son
1930	John Flaherty		Hudson, New Jersey	New Jersey	None	Son
1940	John Flaherty	11	Middlesex-County, Massachusetts	Massachusetts	—	Son
1940	John Flaherty	26	Hudson-County, New Jersey	New Jersey	New Worker	Son
1930	John Flaherty		Allegheny, Pennsylvania	Pennsylvania	Laborer	Son
1930	John G. Flaherty		Cumberland, Maine	Maine	—	Son
1930	John Flaherty		Allegheny, Pennsylvania	Pennsylvania	—	Son
1940	John E. Flaherty	56	Meade-County, Kentucky	Kentucky	Farmer	Head
1940	John Flaherty	18	Cook-County, Illinois	Illinois	Errand Boy	Son
1910	John E Flaherty		Norfolk, Massachusetts	Ireland	Shipper	Head
1910	John M Flaherty		Suffolk, Massachusetts	Massachusetts	—	Son
1940	John J. Flaherty	21	Hennepin-County, Minnesota	Minnesota	File Clerk	Son
1930	John Flaherty		Middlesex, Massachusetts	Massachusetts	Foreman	Head
1930	John J. Flaherty		Suffolk, Massachusetts	Massachusetts	Laborer	Son
1930	John Flaherty		Garrett, Maryland	Maryland	Miner	Son
1940	John Flaherty	50	Ada-County, Idaho	Nebraska	Service Sta. Mgr.	Head

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About John Flaherty US Census Records & Model Tree

We've indexed 4368 free, proprietary US Census records for John Flaherty across 1900–1950, covering 47 states, DC, and 1 territory: 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 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 John 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 4368 US Census records for John Flaherty, from 1900 to 1950, across 47 states, DC, and 1 territory.
: You'll see John'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 John Flaherty'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 John Flaherty 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 John Flaherty records from the 1900 through 1950 US Federal Census, across 47 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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