How many Daniel Sullivan census records do you have?

We have 10905 US Census records for Daniel Sullivan, from 1900 to 1950, across 50 states and DC.

What's in a Daniel Sullivan census record?

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

Yes. All Daniel 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 Daniel Sullivan?

We have Daniel Sullivan 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 Daniel 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 Daniel 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.

Daniel Sullivan — US Census Records & Model Tree

We found 10905 free census records for Daniel Sullivan across 6 census years (1900–1950), in 50 states and DC and 852 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 10905 records for Daniel Sullivan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Daniel Sullivan	42	Middlesex-County, Massachusetts	Massachusetts	Laborer	Head
1940	Daniel L. Sullivan	33	Hamilton-County, Ohio	Ohio	Driver	Son
1940	Daniel Sullivan	34	Middlesex-County, Massachusetts	Massachusetts	Chauffeur	Head
1940	Daniel Sullivan	23	Lancaster-County, Nebraska	Nebraska	Laborer	Son
1930	Daniel A Sullivan		Essex, Massachusetts	Massachusetts	Cutter	Head
1940	Daniel Sullivan	29	Suffolk-County, Massachusetts	Massachusetts	Salesman	Son
1930	Daniel J. Sullivan		Middlesex, Massachusetts	Massachusetts	Salesmanager	Son
1930	Daniel A Sullivan		Middlesex, Massachusetts	Massachusetts	Clerk	Head
1940	Daniel Sullivan	47	Suffolk-County, Massachusetts	Ireland	Laborer	Head
1920	Daniel Sullivan		Providence, Rhode Island	Rhode Island	Machinist	Son
1930	Daniel Sullivan		San Francisco, California	California	—	Son
1930	Daniel Sullivan		Allegheny, Pennsylvania	Pennsylvania	Laborer	Son
1940	Daniel Jr. Sullivan	25	Philadelphia-County, Pennsylvania	Pennsylvania	Laborer	Son
1920	Daniel Sullivan		New Castle, Delaware	Delaware	Clerk	Son
1940	Daniel F. Sullivan	27	Newport-County, Rhode Island	Rhode Island	—	Son
1940	Daniel M. Sullivan	37	Plymouth-County, Massachusetts	New Hampshire	Mechanic	Head
1940	Daniel J. Sullivan	47	Suffolk-County, Massachusetts	Massachusetts	Plumber	Head
1910	Daniel J. Sullivan		Denver, Colorado	Colorado	Plumber Helper	Son
1940	Daniel Sullivan	22	Hudson-County, New Jersey	New Jersey	Clerk	Son
1930	Daniel F. Sullivan		Union, New Jersey	New Jersey	Civil Engineer	Son
1930	Daniel Sullivan		Hudson, New Jersey	New Jersey	Clerk	Son
1940	Daniel J. Sullivan	39	Middlesex-County, Massachusetts	Massachusetts	Attorney	Head
1940	Daniel Sullivan	33	Suffolk-County, Massachusetts	Massachusetts	Receiver	Son
1940	Daniel J. Sullivan	26	Queens-County, New York	New York	Electrician	Son
1930	Daniel E. Jr. Sullivan		Forrest, Mississippi	Mississippi	Switchman	Son
1940	Daniel Sullivan	43	Saginaw-County, Michigan	Connecticut	—	Head
1940	Daniel Sullivan	33	San-Francisco-County, California	California	Policeman	Head
1920	Daniel Sullivan		New York, New York	New York	—	Son
1920	Daniel Sullivan		Silver Bow, Montana	Montana	Salesman	Son
1930	Daniel J Sullivan		Essex, Massachusetts	New Hampshire	Steamfitter	Head

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About Daniel Sullivan US Census Records & Model Tree

We've indexed 10905 free, proprietary US Census records for Daniel Sullivan 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 Daniel 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 10905 US Census records for Daniel Sullivan, from 1900 to 1950, across 50 states and DC.
: You'll see Daniel'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 Daniel 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 Daniel 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 Daniel Sullivan 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 Sullivan US Census Records

Agnes Sullivan Alice Sullivan Anna Sullivan Annie Sullivan Arthur Sullivan Catherine Sullivan Charles Sullivan Cornelius 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 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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