How many John Hart census records do you have?

We have 12352 US Census records for John Hart, from 1900 to 1950, across 50 states and DC.

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

Yes. All John Hart 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 Hart?

We have John Hart 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 Hart 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 Hart?

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 Hart — US Census Records & Model Tree

We found 12352 free census records for John Hart across 6 census years (1900–1950), in 50 states and DC and 1783 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Hart Census Records by State & County

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Showing of 12352 records for John Hart US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	John R. Hart		Perry, Pennsylvania	Pennsylvania	—	Son
1930	John Hart		Essex, New Jersey	New Jersey	Clerk	Son
1940	John F. Hart	33	Douglas-County, Nebraska	Nebraska	Office Manager	Head
1940	John Hart	33	Hudson-County, New Jersey	New Jersey	Mail Clerk	Son
1920	John M. Hart		Orange, North Carolina	North Carolina	Farmer	Head
1940	John S. Hart	22	Duval-County, Florida	Florida	Laborer	Son
1930	John Hart		Essex, Massachusetts	Massachusetts	—	Son
1940	John Hart	34	Essex-County, New Jersey	New Jersey	Automobile Salesman	Head
1940	John E Hart	24	Suffolk-County, Massachusetts	Massachusetts	Bookkeeper	Son
1940	John E. Hart	37	Newport-County, Rhode Island	Rhode Island	Ice Dealer	Head
1940	John T Jr Hart	47	Hennepin-County, Minnesota	Minnesota	Insurance Agent	Head
1940	John Hart	29	Union-County, New Jersey	New Jersey	Elevator Operator	Son
1940	John H Hart	29	Hillsborough-County, Florida	Delaware	Granulator Operator	Head
1940	John Hart	30	Washington-County, Nebraska	Nebraska	Machinist	Head
1920	John Hart		Suffolk, Massachusetts	Massachusetts	Machinist	Son
1940	John Hart	32	St.-Clair-County, Michigan	Michigan	Clerk	Son
1920	John Hart		New York, New York	Ireland	Laborer	Head
1930	John W. Hart		Russell, Virginia	Virginia	Farmer	Head
1940	John Hart	36	Caldwell-County, Kentucky	Kentucky	Laborer	Head
1940	John J Hart	65	Allegheny-County, Pennsylvania	New York	Superintendent	Head
1940	John H. Hart	49	Lewis-County, Idaho	Colorado	Farmer	Head
1940	John J. Hart	50	Queens-County, New York	Ireland	Dispatcher	Head
1920	John Hart		Warrick, Indiana	Indiana	Farmer	Head
1940	John Hart	62	Wayne-County, Michigan	Michigan	Banker	Head
1940	John R. Hart	63	Wayne-County, Michigan	England	Machinist	Head
1940	John A. Hart	57	Marion-County, Indiana	Missouri	Machine Operator	Head
1940	John J. @ Hart	58	Westchester-County, New York	Massachusetts	—	Head
1940	John H. Hart	63	York-County, Maine	Maine	Motorman	Head
1940	John Hart	57	Clark-County, Ohio	Ohio	Mechanic	Head
1940	John Hart	80	Woodbury-County, Iowa	Indiana	—	Head

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About John Hart US Census Records & Model Tree

We've indexed 12352 free, proprietary US Census records for John Hart 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 12352 US Census records for John Hart, 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 Hart'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 Hart 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 Hart 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 Hart US Census Records

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