How many James Sullivan census records do you have?

We have 24550 US Census records for James Sullivan, from 1900 to 1950, across 50 states, DC, and 2 territories.

What's in a James Sullivan census record?

You'll see James'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 James Sullivan'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 James Sullivan census records free?

Yes. All James Sullivan 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 James Sullivan?

We have James Sullivan records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 2 territories. Use the year and state filters to narrow your results.

How do I find James Sullivan 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 James Sullivan?

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.

James Sullivan — US Census Records & Model Tree

We found 24550 free census records for James Sullivan across 6 census years (1900–1950), in 50 states, DC, and 2 territories and 1830 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

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Showing of 24550 records for James Sullivan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	James Sullivan	20	Blount-County, Tennessee	Tennessee	Bookkeeper	Son
1940	James Sullivan	22	Cuyahoga-County, Ohio	Ohio	Machinist	Son
1940	James Sullivan	34	Lancaster-County, Nebraska	Nebraska	Laborer	Son
1940	James L. Sullivan	43	Tuscaloosa-County, Alabama	Alabama	Laborer	Head
1940	James Sullivan	22	Dooly-County, Georgia	Georgia	Helper	Son
1920	James Sullivan		Hudson, New Jersey	Vermont	Metalworker	Head
1940	James Sullivan	32	Clinton-County, Missouri	Missouri	Farmer	Son
1940	James P. Sullivan	22	Suffolk-County, Massachusetts	Massachusetts	—	Son
1940	James R. Sullivan	41	Silver-Bow-County, Montana	Montana	Bookkeeper	Head
1940	James Sullivan	30	Union-County, New Jersey	New Jersey	Clerk	Son
1920	James Sullivan		Cook, Illinois	Illinois	Motorman	Son
1940	James Sullivan	27	Susquehanna-County, Pennsylvania	Pennsylvania	Proprietor	Head
1930	James Sullivan		Cook, Illinois	Illinois	Clerical	Son
1920	James Sullivan		Providence, Rhode Island	Rhode Island	Doctor	Son
1930	James H. Sullivan		Providence, Rhode Island	Rhode Island	Salesman	Head
1940	James E. Sullivan	70	Marion-County, Indiana	Kentucky	Structural Iron Worker	Head
1940	James Sullivan	71	Lincoln-County, Washington	Kansas	Farmer	Head
1920	James H. Sullivan		Greenville, South Carolina	South Carolina	Farmer	Head
1920	James C Sullivan		Le Sueur, Minnesota	Minnesota	Farmer	Head
1930	James Sullivan		Pierce, Nebraska	Nebraska	Farm Labor	Head
1940	James Sullivan	51	Norfolk-County, Massachusetts	Vermont	Press Man	Head
1930	James E. Sullivan		Russell, Kentucky	Kentucky	Farmer	Head
1940	James Sullivan	67	Edgefield-County, South Carolina	South Carolina	Operator	Head
1910	James L. Sullivan		Greenville, South Carolina	South Carolina	Farmer	Head
1940	James Sullivan	57	Bristol-County, Massachusetts	England	Fixer	Head
1940	James H. Sullivan	58	Norfolk-County, Massachusetts	Ireland	—	Head
1920	James L. Sullivan		Washoe, Nevada	Nevada	Farmer	Head
1920	James W Sullivan		San Francisco, California	California	Longshoreman	Head
1940	James Sullivan	49	Schuylkill-County, Pennsylvania	Nebraska	Brakeman	Head
1940	James H. Sullivan	67	Franklin-County, Massachusetts	New Hampshire	Machine Tender	Head

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About James Sullivan US Census Records & Model Tree

We've indexed 24550 free, proprietary US Census records for James Sullivan across 1900–1950, covering 50 states, DC, and 2 territories: 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, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, U.S. Virgin Islands, 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 James 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 24550 US Census records for James Sullivan, from 1900 to 1950, across 50 states, DC, and 2 territories.
: You'll see James'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 James Sullivan'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 James Sullivan 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 James Sullivan records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 2 territories. 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 Sullivan US Census Records

Agnes Sullivan Alice Sullivan Anna Sullivan Annie Sullivan Arthur Sullivan Catherine Sullivan Charles Sullivan Cornelius Sullivan Daniel Sullivan Dennis Sullivan Dorothy Sullivan Edward Sullivan Elizabeth Sullivan Ellen Sullivan Eugene Sullivan Florence Sullivan Francis Sullivan Frank Sullivan George Sullivan Helen Sullivan Jeremiah Sullivan John Sullivan Joseph Sullivan Julia Sullivan Katherine Sullivan Margaret Sullivan Mary Sullivan Michael Sullivan Nellie Sullivan Patrick Sullivan Richard Sullivan Robert Sullivan Ruth Sullivan Sarah Sullivan Thomas Sullivan Timothy Sullivan William Sullivan

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