How many Lillian Cook census records do you have?

We have 2876 US Census records for Lillian Cook, from 1900 to 1950, across 49 states and DC.

What's in a Lillian Cook census record?

You'll see Lillian'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 Lillian Cook'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 Lillian Cook census records free?

Yes. All Lillian Cook 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 Lillian Cook?

We have Lillian Cook 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 Lillian Cook 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 Lillian Cook?

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.

Lillian Cook — US Census Records & Model Tree

We found 2876 free census records for Lillian Cook across 6 census years (1900–1950), in 49 states and DC and 896 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Lillian Cook Census Records by State & County

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Showing of 2876 records for Lillian Cook US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Lillian T Cook		Suffolk, Massachusetts	Massachusetts	None	Daughter
1940	Lillian Cook	23	King-County, Washington	Illinois	New Worker	Daughter
1920	Lillian Cook		Kings, New York	New York	Clerk	Daughter
1910	Lillian Cook		Northampton, North Carolina	North Carolina	—	Daughter
1940	Lillian Cook	25	Ottawa-County, Michigan	Michigan	—	Daughter
1900	Lillian Cook	28	Hudson, New Jersey	New Jersey	—	Wife
1940	Lillian L. Cook	12	Baltimore-City-County, Maryland	Maryland	—	Daughter
1920	Lillian Cook		Gwinnett, Georgia	Georgia	Operator	Daughter
1930	Lillian Cook		San Francisco, California	California	—	Daughter
1940	Lillian L Cook	17	Forsyth-County, North Carolina	North Carolina	—	Daughter
1940	Lillian Cook	22	Allegheny-County, Pennsylvania	Pennsylvania	Maid	Daughter
1920	Lillian Cook		Williamson, Tennessee	Tennessee	—	Daughter
1920	Lillian Cook		Butler, Alabama	Alabama	—	Daughter
1940	Lillian Cook	16	Hamilton-County, Tennessee	Tennessee	—	Daughter
1930	Lillian M. Cook		Essex, Massachusetts	Massachusetts	None	Daughter
1920	Lillian Cook		Perry, Pennsylvania	Pennsylvania	—	Wife
1940	Lillian Cook	10	Sonoma-County, California	California	—	Daughter
1930	Lillian B. Cook		Mckenzie, North Dakota	North Dakota	—	Daughter
1940	Lillian Cook	31	Pottawatomie-County, Kansas	Kansas	—	Wife
1910	Lillian E Cook		Bradley, Arkansas	Arkansas	—	Daughter
1910	Lillian Cook		Stewart, Tennessee	Tennessee	—	Daughter
1940	Lillian Cook	57	Stevens-County, Minnesota	Minnesota	—	Wife
1900	Lillian Cook	10	Surry, North Carolina	North Carolina	—	Daughter
1930	Lillian Cook		Henrico, Virginia	Virginia	—	Daughter
1940	Lillian Cook	23	Camden-County, New Jersey	New Jersey	Technician	Daughter
1940	Lillian Cook	40	Stearns-County, Minnesota	Minnesota	—	Wife
1910	Lillian C. Cook		Kent, Maryland	Maryland	—	Daughter
1940	Lillian Cook	30	Baltimore-City-County, Maryland	Maryland	—	Wife
1940	Lillian Cook	37	Delaware-County, New York	England	—	Wife
1940	Lillian Cook	12	Essex-County, New Jersey	New Jersey	—	Daughter

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About Lillian Cook US Census Records & Model Tree

We've indexed 2876 free, proprietary US Census records for Lillian Cook across 1900–1950, covering 49 states and DC: Alabama, 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 Lillian 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 2876 US Census records for Lillian Cook, from 1900 to 1950, across 49 states and DC.
: You'll see Lillian'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 Lillian Cook'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 Lillian Cook 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 Lillian Cook 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 Cook US Census Records

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