How many John Mcmullen census records do you have?

We have 3316 US Census records for John Mcmullen, from 1900 to 1950, across 49 states and DC.

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

Yes. All John Mcmullen 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 Mcmullen?

We have John Mcmullen 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 Mcmullen 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 Mcmullen?

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 Mcmullen — US Census Records & Model Tree

We found 3316 free census records for John Mcmullen across 6 census years (1900–1950), in 49 states and DC and 865 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Mcmullen Census Records by State & County

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Showing of 3316 records for John Mcmullen US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John G. Mcmullen	20	Rooks-County, Kansas	Kansas	—	Son
1940	John R Mcmullen	56	Pinellas-County, Florida	Florida	Traffic Patrolman	Head
1930	John Mcmullen		Philadelphia, Pennsylvania	Ireland	Helper	Head
1920	John Mcmullen		New Castle, Delaware	Delaware	Guard	Head
1930	John W Mcmullen		Licking, Ohio	Ohio	Farmer	Head
1920	John Mcmullen		Hudson, New Jersey	Scotland	Bricklayer	Head
1940	John Mcmullen	80	Kane-County, Illinois	Ireland	—	Head
1930	John Mcmullen		Sunflower, Mississippi	Mississippi	Farmer	Head
1900	John Mcmullen	45	Philadelphia, Pennsylvania	Pennsylvania	Lawmaker	Head
1940	John Mcmullen	45	Washington-County, Colorado	Kansas	Laborer	Head
1930	John Jr. Mcmullen		Philadelphia, Pennsylvania	Pennsylvania	—	Son
1910	John Mcmullen		Passaic, New Jersey	Scotland	—	Head
1940	John Mcmullen	53	Luce-County, Michigan	Michigan	Laborer	Head
1940	John P Mcmullen	12	Middlesex-County, Massachusetts	Massachusetts	—	Son
1940	John Mcmullen	14	Luce-County, Michigan	Michigan	—	Son
1910	John Mcmullen		Bristol, Massachusetts	Scotland	Laborer	Head
1940	John Mcmullen	17	Wayne-County, Michigan	Pennsylvania	—	Son
1940	John Mcmullen	31	Pulaski-County, Kentucky	Kentucky	Laborer	Head
1930	John Mcmullen		York, South Carolina	South Carolina	Farm Laborer	Head
1920	John Mcmullen		Allegheny, Pennsylvania	Pennsylvania	Clerk	Son
1930	John C Mcmullen		Caldwell, North Carolina	North Carolina	Day Laborer	Head
1940	John Mcmullen	12	Genesee-County, New York	New York	—	Son
1910	John Mcmullen		Letcher, Kentucky	Kentucky	Farmer	Head
1920	John H. Mcmullen		Dallas, Texas	Texas	Farmer	Head
1930	John Mcmullen		Cuyahoga, Ohio	Ohio	—	Son
1930	John Mcmullen		Philadelphia, Pennsylvania	Pennsylvania	—	Son
1930	John Mcmullen		Kanawha, West Virginia	West Virginia	—	Son
1920	John J Mcmullen		Philadelphia, Pennsylvania	Pennsylvania	—	Son
1940	John Mcmullen	12	Cook-County, Illinois	Illinois	—	Son
1940	John B Mcmullen	51	Hennepin-County, Minnesota	Wisconsin	Mechanic	Head

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About John Mcmullen US Census Records & Model Tree

We've indexed 3316 free, proprietary US Census records for John Mcmullen 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 3316 US Census records for John Mcmullen, 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 Mcmullen'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 Mcmullen 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 Mcmullen 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.