How many John Sullivan census records do you have?

We have 46285 US Census records for John Sullivan, from 1900 to 1950, across 50 states, DC, and 2 territories.

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

Yes. All John 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 John Sullivan?

We have John 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 John 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 John 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.

John Sullivan — US Census Records & Model Tree

We found 46285 free census records for John Sullivan across 6 census years (1900–1950), in 50 states, DC, and 2 territories and 2061 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Sullivan Census Records by State & County

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Showing of 46285 records for John Sullivan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Sullivan	30	Wyandotte-County, Kansas	Kansas	Janitor	Head
1940	John H. Sullivan	40	Greenville-County, South Carolina	South Carolina	Farm Laborer	Head
1940	John Jr Sullivan	23	Middlesex-County, Massachusetts	MASSACHUSETTS	—	Son
1920	John Sullivan		Laurens, South Carolina	South Carolina	Laborer	Son
1920	John L Sullivan		Hillsborough, New Hampshire	New Hampshire	Shoe Maker	Son
1940	John Sullivan	31	Leslie-County, Kentucky	Kentucky	Laborer	Head
1920	John E Sullivan		Providence, Rhode Island	Rhode Island	Dryer	Head
1940	John F. Sullivan	35	Albany-County, New York	New York	Chief Clerk	Son
1940	John Sullivan	22	Hudson-County, New Jersey	New Jersey	Elevator Operator	Son
1940	John Sullivan	25	Hudson-County, New Jersey	New Jersey	Clerk	Son
1940	John Sullivan	27	Marion-County, Indiana	Indiana	Shoe Maker	Son
1940	John Sullivan	22	Silver-Bow-County, Montana	Montana	—	Son
1920	John H. Sullivan		Bristol, Rhode Island	Rhode Island	Presser	Son
1940	John Sullivan	23	Hennepin-County, Minnesota	Minnesota	Clerk	Son
1940	John Sullivan	24	Richmond-City-County, Virginia	Virginia	Spooler	Son
1940	John J. Jr. Sullivan	21	Essex-County, Massachusetts	Massachusetts	Clerk	Son
1940	John Jr. Sullivan	27	Bergen-County, New Jersey	New Jersey	Lawyer	Son
1920	John Sullivan		Providence, Rhode Island	Rhode Island	Machinist	Son
1940	John F. Jr. Sullivan	24	Harris-County, Texas	Texas	No	Son
1940	John Sullivan	40	Windham-County, Vermont	Vermont	Salesman	Head
1920	John Sullivan		Hillsborough, New Hampshire	New Hampshire	Telegrapher	Head
1940	John Jr. Sullivan	37	Kings-County, New York	New York	Law Clerk	Head
1940	John P Sullivan	22	Multnomah-County, Oregon	Oregon	Clerk	Head
1940	John Sullivan	25	Summit-County, Ohio	Ohio	Office Foreman	Son
1940	John J Sullivan	24	Chatham-County, Georgia	Georgia	Receiving Clerk	Son
1930	John J Jr Sullivan		Washington, Colorado	Nebraska	Laborer	Son
1940	John J. @ Sullivan	41	Newport-County, Rhode Island	Rhode Island	Machinist	Head
1940	John F. Jr. Sullivan	32	Hampden-County, Massachusetts	Massachusetts	Agent	Son
1940	John J. Sullivan	37	Philadelphia-County, Pennsylvania	Penna.	Salesman	Son
1940	John Sullivan	21	King-County, Washington	Washington	Carrier	Son

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About John Sullivan US Census Records & Model Tree

We've indexed 46285 free, proprietary US Census records for John Sullivan across 1900–1950, covering 50 states, DC, and 2 territories: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, 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, 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 46285 US Census records for John Sullivan, from 1900 to 1950, across 50 states, DC, and 2 territories.
: 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 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 John 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 John 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 James Sullivan Jeremiah 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

All Sullivan census records →

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