How many Michael Sullivan census records do you have?

We have 9272 US Census records for Michael Sullivan, from 1900 to 1950, across 50 states, DC, and 1 territory.

What's in a Michael Sullivan census record?

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

Yes. All Michael 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 Michael Sullivan?

We have Michael Sullivan records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find Michael 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 Michael 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.

Michael Sullivan — US Census Records & Model Tree

We found 9272 free census records for Michael Sullivan across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 795 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 9272 records for Michael Sullivan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Michael Sullivan	48	Franklin-County, Kentucky	Kentucky	Wholesale Dealer	Head
1930	Michael J. Sullivan		Dubuque, Iowa	Iowa	Farmer	Head
1940	Michael Sullivan	29	Luzerne-County, Pennsylvania	Pennsylvania	Garage Mechanic	Son
1940	Michael L. Sullivan	34	Marion-County, Indiana	Indiana	Lineman	Son
1940	Michael T Sullivan	29	Bay-County, Michigan	Michigan	Salesman	Head
1930	Michael Sullivan		New York, New York	New York	Lineman	Son
1920	Michael H Sullivan		Providence, Rhode Island	Maine	Fireman	Head
1940	Michael Sullivan	56	Hennepin-County, Minnesota	Wisconsin	Car Repairer	Head
1910	Michael F. Sullivan		Bristol, Massachusetts	Michigan	Weaver	Head
1910	Michael J Sullivan		Saline, Kansas	Illinois	Farmer	Head
1930	Michael D. Sullivan		Marion, Indiana	Indiana	Machinist	Head
1930	Michael Sullivan		Kings, New York	New York	Pilot	Head
1930	Michael Sullivan		Gogebic, Michigan	Michigan	Surfaceman	Head
1910	Michael J Sullivan		Shelby, Tennessee	Tennessee	Blacksmith	Head
1940	Michael J Jr Sullivan	51	Los-Angeles-County, California	New Hampshire	Electrician	Head
1940	Michael C. Sullivan	60	Worcester-County, Massachusetts	Massachusetts	Police Man	Head
1940	Michael Sullivan	67	Bronx-County, New York	New York	—	Head
1940	Michael Sullivan	66	Middlesex-County, Massachusetts	Massachusetts	—	Husband
1940	Michael Sullivan	61	Cuyahoga-County, Ohio	Pennsylvania	—	Head
1930	Michael H. Sullivan		Suffolk, Massachusetts	Massachusetts	Painter	Head
1940	Michael Sullivan	15	Middlesex-County, Massachusetts	Massachusetts	—	Son
1920	Michael Sullivan		Union, New Jersey	New Jersey	Stenographer	Son
1940	Michael J. Sullivan	49	Middlesex-County, Massachusetts	Irish Free State	Laborer	Head
1940	Michael Sullivan	17	Luzerne-County, Pennsylvania	Pennsylvania	—	Son
1940	Michael Sullivan	16	Kings-County, New York	New York	—	Son
1940	Michael Jr. Sullivan	10	Richmond-County, New York	New York	—	Son
1940	Michael J. Sullivan	40	Suffolk-County, Massachusetts	Irish Free State	Steam Fitter	Head
1930	Michael Sullivan		Suffolk, Massachusetts	Ireland	Operator	Head
1940	Michael Sullivan	17	Dickinson-County, Michigan	Minnesota	—	Son
1920	Michael Sullivan		Middlesex, Massachusetts	Massachusetts	Shoe Maker	Son

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About Michael Sullivan US Census Records & Model Tree

We've indexed 9272 free, proprietary US Census records for Michael Sullivan across 1900–1950, covering 50 states, DC, and 1 territory: 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, 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 Michael 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 9272 US Census records for Michael Sullivan, from 1900 to 1950, across 50 states, DC, and 1 territory.
: You'll see Michael'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 Michael 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 Michael 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 Michael Sullivan records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. 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 John Sullivan Joseph Sullivan Julia Sullivan Katherine Sullivan Margaret Sullivan Mary Sullivan Nellie Sullivan Patrick Sullivan Richard Sullivan Robert Sullivan Ruth Sullivan Sarah Sullivan Thomas Sullivan Timothy Sullivan William Sullivan

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