How many Mary Warren census records do you have?

We have 9918 US Census records for Mary Warren, from 1900 to 1950, across 49 states and DC.

What's in a Mary Warren 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 Warren'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 Warren census records free?

Yes. All Mary Warren 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 Warren?

We have Mary Warren 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 Mary Warren 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 Warren?

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 Warren — US Census Records & Model Tree

We found 9918 free census records for Mary Warren across 6 census years (1900–1950), in 49 states and DC and 1753 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Warren Census Records by State & County

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Showing of 9918 records for Mary Warren US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Warren	25	Southampton-County, Virginia	Virginia	Housekeeper	Daughter
1940	Mary A. Warren	37	Middlesex-County, Massachusetts	Massachusetts	Book Binder	Daughter
1930	Mary Warren		Orange, North Carolina	North Carolina	Laundress	Daughter
1930	Mary F. Warren		Shawnee, Kansas	Kansas	None	Daughter
1940	Mary Frances Warren	20	Silver-Bow-County, Montana	Montana	—	Daughter
1940	Mary Ann Warren	21	Polk-County, Iowa	Iowa	—	Daughter
1910	Mary Warren		Davidson, Tennessee	Tennessee	—	Daughter
1940	Mary E. Warren	84	Barber-County, Kansas	Missouri	—	Head
1920	Mary Jane Warren		Hempstead, Arkansas	Arkansas	—	Wife
1940	Mary Warren	69	Pierce-County, Washington	Norway	—	Wife
1940	Mary Warren	61	Polk-County, Iowa	Iowa	—	Head
1920	Mary Warren		Pittsylvania, Virginia	Virginia	—	Wife
1930	Mary H Warren		Allegheny, Pennsylvania	Pennsylvania	—	Wife
1920	Mary Warren		Marion, Indiana	Ireland	—	Head
1930	Mary Warren		Niagara, New York	New York	Farmer	Head
1940	Mary Warren	55	Beaver-County, Pennsylvania	England	Buyer	Head
1940	Mary Stella Warren	66	Merrimack-County, New Hampshire	New Hampshire	—	Head
1910	Mary B. Warren		Bullock, Alabama	Alabama	Laborer	Daughter
1910	Mary Warren		Greene, North Carolina	North Carolina	Farm Laborer	Wife
1910	Mary Warren		Lawrence, Alabama	Alabama	—	Daughter
1940	Mary Warren	22	Green-County, Kentucky	Kentucky	—	Daughter
1930	Mary A. Warren		Polk, Iowa	Iowa	—	Daughter
1940	Mary Warren	19	Middlesex-County, Massachusetts	Massachusetts	General Clerk	Daughter
1940	Mary Warren	16	Lawrence-County, Indiana	Indiana	Net Maker	Daughter
1930	Mary L. Warren		Southampton, Virginia	Virginia	—	Daughter
1940	Mary D. Warren	41	Chelan-County, Washington	Canada English	—	Wife
1930	Mary E Warren		Dauphin, Pennsylvania	Pennsylvania	None	Daughter
1940	Mary Willene Warren	19	Spartanburg-County, South Carolina	South Carolina	House Keeper	Daughter
1940	Mary Warren	34	Ashley-County, Arkansas	Arkansas	—	Wife
1930	Mary G Warren		Southampton, Virginia	Virginia	—	Wife

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About Mary Warren US Census Records & Model Tree

We've indexed 9918 free, proprietary US Census records for Mary Warren 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 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 9918 US Census records for Mary Warren, from 1900 to 1950, across 49 states and DC.
: 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 Warren'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 Warren 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 Warren 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.