How many John Gallagher census records do you have?

We have 13792 US Census records for John Gallagher, from 1900 to 1950, across 50 states and DC.

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

Yes. All John Gallagher 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 Gallagher?

We have John Gallagher 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 John Gallagher 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 Gallagher?

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 Gallagher — US Census Records & Model Tree

We found 13792 free census records for John Gallagher across 6 census years (1900–1950), in 50 states and DC and 928 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Gallagher Census Records by State & County

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Showing of 13792 records for John Gallagher US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Gallagher	32	Cheshire-County, New Hampshire	New Hampshire	Inspector	Son
1940	John W Gallagher	23	Belknap-County, New Hampshire	New Hampshire	Moulder	Son
1930	John Gallagher		Charlevoix, Michigan	Michigan	—	Son
1940	John Gallagher	22	Cook-County, Illinois	Illinois	—	Son
1920	John J Gallagher		Philadelphia, Pennsylvania	England	Driver	Head
1940	John J Gallagher	36	Providence-County, Rhode Island	Rhode Island	Proprietor	Head
1930	John J Gallagher		Philadelphia, Pennsylvania	Penna	Chauffeur	Son
1930	John Gallagher		Cuyahoga, Ohio	Ohio	Superintendent	Son
1940	John R. Gallagher	23	Nodaway-County, Missouri	Missouri	Farmer	Son
1940	John J. Gallagher	36	Kings-County, New York	New York	Chauffeur	Head
1940	John Gallagher	28	King-County, Washington	Washington	Laborer	Son
1940	John Gallagher	23	Denver-County, Colorado	Colorado	Meat Cutter	Son
1940	John Gallagher	23	Essex-County, New Jersey	New Jersey	Butcher	Son
1930	John Gallagher		Middlesex, Massachusetts	Massachusetts	Printer	Head
1920	John Gallagher		Kings, New York	Ireland	None	Head
1920	John Gallagher		Philadelphia, Pennsylvania	Ireland	Fireman	Head
1930	John S. Gallagher		Minnehaha, South Dakota	Iowa	Book-Keeper	Head
1940	John Gallagher	65	Kings-County, New York	Ireland	Watchman	Head
1940	John Gallagher	47	Philadelphia-County, Pennsylvania	Ireland	Operator	Head
1920	John Gallagher		Middlesex, Massachusetts	Ireland	Rubber Worker	Head
1940	John Gallagher	64	Alameda-County, California	Ohio	Salesman	Head
1940	John A. Gallagher	53	Philadelphia-County, Pennsylvania	Penna.	Clerk	Head
1940	John Gallagher	58	Kings-County, New York	Scotland	Shipworker	Head
1940	John J. Gallagher	76	Worcester-County, Massachusetts	England	Civil Engineer	Head
1940	John Gallagher	72	Philadelphia-County, Pennsylvania	England	Clerk Retired	Head
1930	John Gallagher		Cook, Illinois	Ireland	Switchman	Head
1920	John L Gallagher		Cleveland, Oklahoma	Virginia	Farmer	Head
1920	John Gallagher		New York, New York	Ireland	Laborer	Head
1920	John Gallagher		Delaware, Pennsylvania	Ireland	Laborer	Head
1940	John T. Gallagher	79	Essex-County, Massachusetts	England	—	Head

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About John Gallagher US Census Records & Model Tree

We've indexed 13792 free, proprietary US Census records for John Gallagher 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 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 13792 US Census records for John Gallagher, from 1900 to 1950, across 50 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 Gallagher'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 Gallagher 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 Gallagher 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.

Other Gallagher US Census Records

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