How many John Mullen census records do you have?

We have 6503 US Census records for John Mullen, from 1900 to 1950, across 50 states and DC.

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

Yes. All John Mullen 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 Mullen?

We have John Mullen 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 Mullen 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 Mullen?

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 Mullen — US Census Records & Model Tree

We found 6503 free census records for John Mullen across 6 census years (1900–1950), in 50 states and DC and 894 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Mullen Census Records by State & County

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Showing of 6503 records for John Mullen US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	John Mullen		Hennepin, Minnesota	Nebraska	Machinist	Son
1940	John Oscar Mullen	22	Yavapai-County, Arizona	Arizona	Laborer	Son
1940	John Mullen	25	Baltimore-City-County, Maryland	Maryland	—	Son
1930	John Mullen		Hamilton, Ohio	Ohio	Clerk	Son
1940	John C. Mullen	21	Johnson-County, Kansas	Kansas	Apprentice Stone-Mason	Son
1940	John Mullen	21	Walla-Walla-County, Washington	Washington	Saxophone Player	Son
1940	John H. Mullen	35	Madison-County, Illinois	Illinois	Clerk	Head
1930	John Mullen		Winnebago, Illinois	Illinois	Implement	Son
1940	John F. Mullen	72	Jefferson-County, Alabama	Scotland	—	Head
1940	John Mullen	58	Philadelphia-County, Pennsylvania	Ireland	Fire Men	Head
1940	John Mullen	53	Essex-County, Massachusetts	Scotland	Electrician	Head
1940	John Mullen	69	Poweshiek-County, Iowa	Scotland	—	Head
1930	John Mullen		Jackson, Florida	Florida	Farmer	Head
1930	John Mullen		Gates, North Carolina	North Carolina	—	Son
1940	John Mullen	17	Contra-Costa-County, California	Ohio	—	Son
1920	John J Mullen		Clay, Nebraska	Illinois	Farmer	Head
1930	John Mullen		Kings, New York	Italy	Foreman	Head
1940	John Mullen	11	Suffolk-County, Massachusetts	Massachusetts	—	Son
1920	John Mullen		Philadelphia, Pennsylvania	Phila	Spinner	Son
1940	John Mullen	13	Suffolk-County, Massachusetts	Massachusetts	—	Son
1910	John J Mullen		Providence, Rhode Island	Rhode Island	Student	Son
1920	John M Mullen		Clay, Kansas	Kansas	—	Son
1940	John Mullen	50	Douglas-County, Nebraska	Nebraska	—	Head
1930	John E. Mullen		Worcester, Massachusetts	Massachusetts	Bond Salesman	Son
1910	John H Mullen		Middlesex, Massachusetts	Massachusetts	Clerk	Head
1940	John Mullen	56	Suffolk-County, Massachusetts	Northern Ireland	Guard	Head
1930	John Mullen		Lawrence, Arkansas	Arkansas	Farmer	Head
1940	John Mullen	12	Cook-County, Illinois	Illinois	—	Son
1940	John Mullen	11	Essex-County, New Jersey	New Jersey	—	Son
1930	John Mullen		Athens, Ohio	Ohio	Loader	Son

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About John Mullen US Census Records & Model Tree

We've indexed 6503 free, proprietary US Census records for John Mullen 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 6503 US Census records for John Mullen, 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 Mullen'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 Mullen 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 Mullen 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.

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