How many John Maher census records do you have?

We have 4261 US Census records for John Maher, from 1900 to 1950, across 49 states and DC.

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

Yes. All John Maher 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 Maher?

We have John Maher 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 Maher 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 Maher?

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 Maher — US Census Records & Model Tree

We found 4261 free census records for John Maher across 6 census years (1900–1950), in 49 states and DC and 509 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Maher Census Records by State & County

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Showing of 4261 records for John Maher US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1900	John Maher	5	Rockingham, New Hampshire	New Hampshire	—	Son
1940	John T. Maher	37	Hampden-County, Massachusetts	Connecticut	W. P. A.	Head
1940	John F Maher	46	Bronx-County, New York	Connecticut	Machinist	Head
1940	John J Maher	66	Suffolk-County, Massachusetts	Ireland	Cook	Head
1920	John J. Maher		Kings, New York	Ireland	Watchman	Head
1930	John A Maher		Kings, New York	New York	Banker	Head
1920	John J. Maher		Essex, New Jersey	New Jersey	Train Dispatcher	Head
1940	John D Maher	17	Grundy-County, Illinois	Illinois	Pw	Son
1910	John J Jr Maher		Richmond, Georgia	Georgia	Clerk	Son
1920	John Maher		Hudson, New Jersey	New Jersey	—	Son
1920	John Maher		Schuylkill, Pennsylvania	Pennsylvania	None	Son
1910	John Maher		New York, New York	Ireland	Steam Fitter	Head
1940	John Maher	13	Richmond-County, New York	New York	—	Son
1940	John B. Maher	11	Cook-County, Illinois	Illinois	—	Son
1940	John M. Maher	13	Brown-County, Ohio	Ohio	—	Son
1920	John J Maher		Providence, Rhode Island	Rhode Island	Shipping Clerk	Son
1940	John J. Maher	30	Cook-County, Illinois	Illinois	Salesman	Head
1940	John Maher	15	Hudson-County, New Jersey	New Jersey	—	Son
1940	John Ed. Maher	13	Lucas-County, Ohio	Ohio	—	Son
1940	John Maher	11	Nassau-County, New York	New York	—	Son
1940	John (X) Maher	38	Queens-County, New York	Newfoundland	Plasterer	Head
1940	John Maher	36	Madison-County, Illinois	Illinois	Welder	Head
1940	John W. Maher	27	Worcester-County, Massachusetts	Massachusetts	Real Estate	Son
1920	John Maher		Schuylkill, Pennsylvania	Pennsylvania	—	Son
1940	John F Maher	29	Kings-County, New York	New York	Clerk	Son
1940	John Maher	18	Dallas-County, Texas	Texas	—	Son
1930	John Jr. Maher		Monroe, New York	New York	—	Son
1940	John Maher	36	Kings-County, New York	New York	Chauffeur	Head
1930	John Maher		Cook, Illinois	Ireland	Laborer	Head
1910	John J. Maher		New York, New York	Ireland	—	Head

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About John Maher US Census Records & Model Tree

We've indexed 4261 free, proprietary US Census records for John Maher across 1900–1950, covering 49 states and DC: Alabama, 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 4261 US Census records for John Maher, 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 Maher'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 Maher 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 Maher 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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