How many Mary Lewis census records do you have?

We have 37527 US Census records for Mary Lewis, from 1900 to 1950, across 50 states, DC, and 2 territories.

What's in a Mary Lewis census record?

You'll see Mary'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 Mary Lewis'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 Mary Lewis census records free?

Yes. All Mary Lewis 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 Mary Lewis?

We have Mary Lewis 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 Mary Lewis 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 Mary Lewis?

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.

Mary Lewis — US Census Records & Model Tree

We found 37527 free census records for Mary Lewis across 6 census years (1900–1950), in 50 states, DC, and 2 territories and 2573 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Lewis Census Records by State & County

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Showing of 37527 records for Mary Lewis US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Lewis		Henrico, Virginia	Virginia	—	Wife
1940	Mary Lewis	22	Mcdonough-County, Illinois	Illinois	Grade Teacher	Daughter
1940	Mary Lewis	21	Nash-County, North Carolina	North Carolina	—	Daughter
1930	Mary Lewis		Perry, Alabama	Alabama	Cook	Daughter
1940	Mary Lewis	26	Pointe-Coupee-County, Louisiana	Louisiana	—	Wife
1940	Mary E Lewis	29	Marion-County, South Carolina	South Carolina	—	Daughter
1940	Mary Lewis	30	Jefferson-County, Kentucky	Kentucky	Housekeeper	Head
1940	Mary Lewis	30	Ramsey-County, Minnesota	Minnesota	Packer	Wife
1940	Mary Lewis	24	Sunflower-County, Mississippi	Mississippi	—	Wife
1930	Mary E. Lewis		Luzerne, Pennsylvania	Wales	—	Head
1930	Mary E Lewis		Comanche, Texas	Alabama	—	Head
1940	Mary Lewis	46	Bristol-County, Massachusetts	Portugal	—	Wife
1940	Mary Lewis	46	Leslie-County, Kentucky	Kentucky	—	Wife
1900	Mary Lewis	43	Lackawanna, Pennsylvania	Wales	—	Wife
1940	Mary B. Lewis	45	Bibb-County, Georgia	GEORGIA	Cook	Wife
1940	Mary Lewis	39	Butler-County, Alabama	Alabama	Laundress	Wife
1920	Mary Lewis		Greene, Alabama	Alabama	Laundress	Wife
1940	Mary Lewis	44	Yazoo-County, Mississippi	Mississippi	—	Wife
1940	Mary Lewis	52	St.-Clair-County, Illinois	Mississippi	—	Wife
1940	Mary Lewis	54	Marion-County, Indiana	Kentucky	Maid	Wife
1940	Mary E. Lewis	73	Baltimore-City-County, Maryland	Maryland	—	Wife
1940	Mary Lewis	42	Summit-County, Ohio	Illinois	—	Wife
1910	Mary Ann Lewis		Lackawanna, Pennsylvania	Wales	—	Wife
1940	Mary Lewis	43	Guernsey-County, Ohio	Syria	—	Wife
1940	Mary Lewis	40	Providence-County, Rhode Island	Portugal	—	Wife
1940	Mary Lewis	44	Butler-County, Ohio	New Jersey	—	Wife
1920	Mary Lewis		Robeson, North Carolina	North Carolina	—	Wife
1920	Mary Lewis		Vernon, Wisconsin	Wisconsin	—	Wife
1920	Mary Lewis		Henrico, Virginia	Virginia	Maid	Wife
1940	Mary Lewis	63	Shiawassee-County, Michigan	Michigan	—	Wife

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About Mary Lewis US Census Records & Model Tree

We've indexed 37527 free, proprietary US Census records for Mary Lewis 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, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, U.S. Virgin Islands, 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 Mary 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 37527 US Census records for Mary Lewis, from 1900 to 1950, across 50 states, DC, and 2 territories.
: You'll see Mary'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 Mary Lewis'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 Mary Lewis 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 Mary Lewis 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.