How many Katherine Sullivan census records do you have?

We have 4137 US Census records for Katherine Sullivan, from 1900 to 1950, across 49 states and DC.

What's in a Katherine Sullivan census record?

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

Yes. All Katherine 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 Katherine Sullivan?

We have Katherine Sullivan records from the 1900 through 1950 US Federal Census, across 49 states and DC. Use the year and state filters to narrow your results.

How do I find Katherine 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 Katherine 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.

Katherine Sullivan — US Census Records & Model Tree

We found 4137 free census records for Katherine Sullivan across 6 census years (1900–1950), in 49 states and DC and 532 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Katherine Sullivan Census Records by State & County

Records per state:

Census Record Search

First Name

Middle Name

Last Name (Required)

Census Year

State

Birth Year

Year Range

Birthplace

Age From

Age To

Exact match: Name Location Year

Alternate First Names (comma-separated)

Alternate Last Names (comma-separated)

County

Sex

Marital Status

Race

Relationship to Head

Occupation

Census Page ID

Family Members (in same household)

Search Records

Showing of 4137 records for Katherine Sullivan US Census, ranked by Model Tree richness

No records match your filters.

Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	Katherine Sullivan		Essex, Massachusetts	Massachusetts	—	Daughter
1940	Katherine Sullivan	56	Worcester-County, Massachusetts	Massachusetts	Brake Tender	Daughter
1930	Katherine Sullivan		Queens, New York	New York	Teacher	Daughter
1930	Katherine Sullivan		Cuyahoga, Ohio	Ohio	None	Daughter
1930	Katherine Sullivan		Cook, Illinois	Illinois	—	Daughter
1940	Katherine Sullivan	23	New-York-County, New York	New York	Registered Nurse	Daughter
1910	Katherine Sullivan		Bristol, Massachusetts	Massachusetts	—	Daughter
1920	Katherine Sullivan		Allegheny, Pennsylvania	Pennsylvania	—	Daughter
1930	Katherine P. Sullivan		San Francisco, California	California	—	Daughter
1940	Katherine Sullivan	21	Kings-County, New York	New York	No	Wife
1930	Katherine D. Sullivan		Suffolk, Massachusetts	Massachusetts	Stenographer	Daughter
1930	Katherine Sullivan		Cook, Illinois	Illinois	Operator	Daughter
1940	Katherine Sullivan	29	Suffolk-County, Massachusetts	Massachusetts	Clerk	Daughter
1940	Katherine Sullivan	62	Washington-County, Minnesota	Minnesota	—	Wife
1930	Katherine Sullivan		New York, New York	Ireland	—	Wife
1930	Katherine F Sullivan		Worcester, Massachusetts	Massachusetts	—	Wife
1940	Katherine Sullivan	68	New-York-County, New York	Ireland	—	Head
1940	Katherine G. Sullivan	48	Queens-County, New York	New York	—	Wife
1910	Katherine Sullivan		Essex, Massachusetts	Massachusetts	—	Wife
1940	Katherine Sullivan	62	Los-Angeles-County, California	Ireland	—	Wife
1900	Katherine A. Sullivan	30	Hillsborough, New Hampshire	New Hampshire	—	Wife
1920	Katherine C Sullivan		Allegheny, Pennsylvania	Pennsylvania	None	Daughter
1920	Katherine A. Sullivan		Pend Oreille, Washington	Wisconsin	—	Daughter
1910	Katherine Sullivan		New York, New York	New York	Teacher	Daughter
1940	Katherine E Sullivan	35	Essex-County, Massachusetts	MASSACHUSETTS	—	Daughter
1930	Katherine Sullivan		Allamakee, Iowa	Iowa	—	Wife
1930	Katherine C. Sullivan		Allamakee, Iowa	Iowa	—	Daughter
1910	Katherine Sullivan		Kings, New York	New York	Stenographer	Daughter
1910	Katherine Sullivan		Morrison, Minnesota	Minnesota	—	Daughter
1910	Katherine Sullivan		Carver, Minnesota	Minnesota	—	Daughter

Load More Katherine Sullivan Census Records

About Katherine Sullivan US Census Records & Model Tree

We've indexed 4137 free, proprietary US Census records for Katherine Sullivan across 1900–1950, covering 49 states and DC: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, 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 Katherine 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 4137 US Census records for Katherine Sullivan, from 1900 to 1950, across 49 states and DC.
: You'll see Katherine'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 Katherine 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 Katherine 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 Katherine Sullivan records from the 1900 through 1950 US Federal Census, across 49 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 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 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 →

Browse More Surnames

Stokes Stone Stout Strickland Strong Stuart Summers Sutherland Sutton Swanson Sweeney Tate

← Back to US Census Records