How many John Tierney census records do you have?

We have 3774 US Census records for John Tierney, from 1900 to 1950, across 49 states and DC.

What's in a John Tierney 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 Tierney'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 Tierney census records free?

Yes. All John Tierney 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 Tierney?

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

How do I find John Tierney 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 Tierney?

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 Tierney — US Census Records & Model Tree

We found 3774 free census records for John Tierney across 6 census years (1900–1950), in 49 states and DC and 435 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Tierney Census Records by State & County

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Showing of 3774 records for John Tierney US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Tierney	34	Bronx-County, New York	New York	Soaker	Head
1940	John Tierney	36	Providence-County, Rhode Island	Rhode Island	Shipping Clerk	Head
1940	John M. Tierney	33	Union-County, New Jersey	New Jersey	Plumber	Son
1940	John Tierney	31	Orange-County, New York	New York	—	Son
1940	John Tierney	33	Will-County, Illinois	Illinois	Gauger	Son
1940	John Tierney	41	Bronx-County, New York	New York	Laborer	Head
1930	John S. Tierney		Mercer, New Jersey	England	Houseman	Head
1940	John Tierney	10	New-York-County, New York	New York	—	Son
1940	John Tierney	14	Union-County, New Jersey	New Jersey	—	Son
1930	John J Tierney		Middlesex, Massachusetts	Massachusetts	Chauffeur	Son
1910	John Tierney		New York, New York	Ireland	Laborer	Head
1920	John M Tierney		Cascade, Montana	Massachusetts	Laborer	Head
1930	John P Tierney		Middlesex, Massachusetts	Massachusetts	—	Son
1920	John Tierney		King, Washington	Washington	Teamster	Son
1920	John Tierney		Cascade, Montana	Montana	None	Son
1930	John Tierney		Hamilton, Ohio	Ohio	Printer	Head
1940	John Tierney	16	Suffolk-County, Massachusetts	Massachusetts	—	Son
1940	John A. Tierney	43	Brown-County, Wisconsin	Minnesota	Salesman	Head
1940	John Tierney	16	Brown-County, Wisconsin	Minnesota	Clerk	Son
1930	John J. Tierney		Montgomery, Ohio	Massachusetts	Moulder	Head
1910	John Tierney		Worcester, Massachusetts	Ireland	—	Head
1940	John Tierney	15	Hampden-County, Massachusetts	Massachusetts	—	Son
1920	John Tierney		Lackawanna, Pennsylvania	Pennsylvania	—	Son
1940	John Tierney	18	Kings-County, New York	New York	—	Son
1940	John Tierney	56	Suffolk-County, Massachusetts	Irish Free State	—	Head
1940	John Tierney	29	Kings-County, New York	New York	Sales Clerk	Son
1940	John Tierney	25	Dupage-County, Illinois	Illinois	Salesman Meat	Son
1910	John J. Tierney		Union, New Jersey	New Jersey	Needle Maker	Head
1900	John Tierney	48	Kings, New York	Ireland	Smith (Black)	Head
1940	John A. Tierney	40	Baltimore-City-County, Maryland	Maryland	Shipfitter	Head

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About John Tierney US Census Records & Model Tree

We've indexed 3774 free, proprietary US Census records for John Tierney across 1900–1950, covering 49 states and DC: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, 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 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 3774 US Census records for John Tierney, from 1900 to 1950, across 49 states and DC.
: 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 Tierney'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 Tierney 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 Tierney records from the 1900 through 1950 US Federal Census, across 49 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.

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