How many John Mcnulty census records do you have?

We have 3241 US Census records for John Mcnulty, from 1900 to 1950, across 48 states, DC, and 1 territory.

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

Yes. All John Mcnulty 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 Mcnulty?

We have John Mcnulty records from the 1900 through 1950 US Federal Census, across 48 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find John Mcnulty 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 Mcnulty?

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 Mcnulty — US Census Records & Model Tree

We found 3241 free census records for John Mcnulty across 6 census years (1900–1950), in 48 states, DC, and 1 territory and 455 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Mcnulty Census Records by State & County

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Showing of 3241 records for John Mcnulty US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Jr Mcnulty	27	Suffolk-County, Massachusetts	Massachusetts	Interne	Son
1940	John Mcnulty	25	New-York-County, New York	New York	Laborer	Son
1940	John Mcnulty	21	Kings-County, New York	New York	—	Son
1940	John Mcnulty	25	Bucks-County, Pennsylvania	Rhode Island	Engineer'S Helper	Son
1940	John Mcnulty	33	Denver-County, Colorado	Colorado	Bookkeeper	Head
1940	John R Mcnulty	24	Wayne-County, Michigan	Ohio	Steel Worker	Head
1940	John J Mcnulty	29	Philadelphia-County, Pennsylvania	Pennsylvania	Clerk	Head
1940	John Mcnulty	59	Bucks-County, Pennsylvania	Rhode Island	Mechanical Engin.	Head
1940	John Mcnulty	26	Luzerne-County, Pennsylvania	Pennsylvania	Shipping Clerk	Son
1940	John Paul Mcnulty	17	Cook-County, Illinois	Illinois	—	Son
1930	John Mcnulty		Kings, New York	New York	—	Son
1910	John Mcnulty		Washington, Pennsylvania	Ireland	Laborer	Head
1940	John Paul Mcnulty	13	Montgomery-County, Indiana	Indiana	—	Son
1940	John Mcnulty	17	Philadelphia-County, Pennsylvania	Penna	—	Son
1940	John W. Mcnulty	44	Montgomery-County, Indiana	Indiana	Laborer	Head
1910	John Mcnulty		New York, New York	Ireland	Laborer	Head
1930	John Mcnulty		Passaic, New Jersey	New Jersey	—	Son
1940	John Mcnulty	13	Philadelphia-County, Pennsylvania	Pennsylvania	—	Son
1940	John J. Mcnulty	20	Norfolk-County, Massachusetts	Massachusetts	—	Son
1940	John G. Mcnulty	49	Norfolk-County, Massachusetts	Massachusetts	Painter	Head
1930	John J Mcnulty		Broome, New York	Ireland	—	Head
1940	John Mcnulty	20	Orleans-County, Louisiana	Louisiana	Attendant	Son
1940	John Mcnulty	12	Rockland-County, New York	New York	—	Son
1940	John Mcnulty	20	Queens-County, New York	New York	Clerk	Son
1940	John Mcnulty	23	Westchester-County, New York	New York	Yarn Checker	Son
1940	John Mcnulty	16	Delaware-County, Pennsylvania	Pennsylvania	—	Son
1940	John Mcnulty	17	Cuyahoga-County, Ohio	Ohio	Helper	Son
1910	John Mcnulty		New York, New York	Ireland	Builder	Head
1940	John C. Jr. Mcnulty	15	Hennepin-County, Minnesota	Minnesota	—	Son
1940	John Mcnulty	65	Cook-County, Illinois	Ireland	Motorman	Head

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About John Mcnulty US Census Records & Model Tree

We've indexed 3241 free, proprietary US Census records for John Mcnulty across 1900–1950, covering 48 states, DC, and 1 territory: Alabama, 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, Puerto Rico, 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 3241 US Census records for John Mcnulty, from 1900 to 1950, across 48 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 Mcnulty'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 Mcnulty 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 Mcnulty records from the 1900 through 1950 US Federal Census, across 48 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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