How many Mary Mills census records do you have?

We have 8688 US Census records for Mary Mills, from 1900 to 1950, across 49 states and DC.

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

Yes. All Mary Mills 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 Mills?

We have Mary Mills 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 Mills 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 Mills?

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 Mills — US Census Records & Model Tree

We found 8688 free census records for Mary Mills across 6 census years (1900–1950), in 49 states and DC and 1710 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Mills Census Records by State & County

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Showing of 8688 records for Mary Mills US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Mills		Blair, Pennsylvania	Pennsylvania	None	Daughter
1940	Mary Mills	21	Clay-County, Kentucky	Kentucky	Laborer	Daughter
1920	Mary M. Mills		Chester, South Carolina	South Carolina	Farm Laborer	Head
1920	Mary Mills		Cass, Missouri	Idaho	Manager	Head
1920	Mary B. Mills		Onslow, North Carolina	North Carolina	None	Wife
1920	Mary C. Mills		Dorchester, Maryland	Maryland	—	Wife
1940	Mary R. Mills	70	Macon-County, Illinois	Pennsylvania	—	Head
1930	Mary R. Mills		Custer, Nebraska	Missouri	—	Wife
1900	Mary Mills	42	Van Buren, Tennessee	Tennessee	—	Wife
1900	Mary Mills	6	Anderson, South Carolina	South Carolina	—	Daughter
1910	Mary M Mills		Sanpete, Utah	Utah	—	Wife
1910	Mary Mills		Washington, Pennsylvania	West Virginia	—	Wife
1940	Mary J Mills	36	Blaine-County, Oklahoma	Texas	—	Wife
1940	Mary E. Mills	32	Grant-County, Oklahoma	Kansas	H	Wife
1940	Mary Mills	37	Knox-County, Kentucky	Kentucky	Housekeeper	Wife
1940	Mary Mills	16	District-Of-Columbia-County, District of Columbia	Dist. of Col.	New Worker	Daughter
1920	Mary L Mills		Orleans, Louisiana	Louisiana	Cashier	Daughter
1920	Mary L Mills		Iredell, North Carolina	North Carolina	—	Daughter
1910	Mary Mills		Chester, South Carolina	South Carolina	Farm Laborer	Daughter
1910	Mary Mills		Hancock, Georgia	Georgia	Farm Laborer	Wife
1930	Mary Mills		Gloucester, New Jersey	New Jersey	—	Wife
1940	Mary Jane Mills	50	Martin-County, Kentucky	Kentucky	—	Wife
1930	Mary Mills		Elbert, Georgia	Georgia	—	Wife
1920	Mary Mills		Howell, Florida	Georgia	None	Wife
1910	Mary E. Mills		Bourbon, Kansas	Kansas	—	Daughter
1920	Mary Mills		Essex, New Jersey	New Jersey	Scholar	Daughter
1940	Mary B. Mills	49	Fayette-County, Illinois	Illinois	—	Wife
1940	Mary L. Mills	11	Miami-County, Ohio	Ohio	—	Daughter
1900	Mary Mills	35	Lincoln, Mississippi	Mississippi	—	Wife
1940	Mary Lizzie Mills	34	Floyd-County, Georgia	Georgia	Homework	Wife

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About Mary Mills US Census Records & Model Tree

We've indexed 8688 free, proprietary US Census records for Mary Mills 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 8688 US Census records for Mary Mills, 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 Mills'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 Mills 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 Mills 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.