How many Mary Haynes census records do you have?

We have 4489 US Census records for Mary Haynes, from 1900 to 1950, across 50 states and DC.

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

Yes. All Mary Haynes 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 Haynes?

We have Mary Haynes records from the 1900 through 1950 US Federal Census, across 50 states and DC. Use the year and state filters to narrow your results.

How do I find Mary Haynes 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 Haynes?

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 Haynes — US Census Records & Model Tree

We found 4489 free census records for Mary Haynes across 6 census years (1900–1950), in 50 states and DC and 1168 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Haynes Census Records by State & County

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Showing of 4489 records for Mary Haynes US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Haynes	21	Essex-County, Massachusetts	Massachusetts	Typist	Daughter
1940	Mary Haynes	54	Jackson-County, Georgia	Georgia	—	Wife
1900	Mary Haynes	26	Cheshire, New Hampshire	New Hampshire	—	Wife
1940	Mary Haynes	58	Orangeburg-County, South Carolina	South Carolina	—	Head
1940	Mary E. Haynes	81	Butler-County, Nebraska	Pennsylvania	—	Head
1930	Mary L. Haynes		Madison, Tennessee	Tennessee	—	Daughter
1940	Mary L. Haynes	45	Vinton-County, Ohio	Ohio	—	Wife
1940	Mary Jane Haynes	17	Dorchester-County, South Carolina	South Carolina	Farmhand	Daughter
1940	Mary E. Haynes	38	Luna-County, New Mexico	Mississippi	—	Wife
1910	Mary Haynes		Floyd, Georgia	Georgia	Farmer	Daughter
1940	Mary Haynes	17	Calhoun-County, Alabama	Alabama	Laborer	Daughter
1940	Mary S. Haynes	46	Pittsylvania-County, Virginia	Virginia	—	Wife
1940	Mary L. Haynes	10	Randolph-County, Missouri	Missouri	—	Daughter
1940	Mary Haynes	41	Orleans-County, Louisiana	Louisiana	—	Wife
1940	Mary R Haynes	36	Henry-County, Indiana	Indiana	—	Wife
1940	Mary Haynes	17	Wyandotte-County, Kansas	Missouri	—	Daughter
1940	Mary Delia Haynes	18	Union-County, Mississippi	Mississippi	—	Daughter
1930	Mary Haynes		Dickenson, Virginia	Virginia	Farmer	Head
1940	Mary Haynes	18	Prentiss-County, Mississippi	Mississippi	—	Daughter
1920	Mary M. Haynes		Daviess, Kentucky	Kentucky	—	Daughter
1940	Mary Haynes	32	Calhoun-County, South Carolina	South Carolina	Farm Labour	Head
1940	Mary Haynes	46	Letcher-County, Kentucky	Kentucky	—	Wife
1940	Mary Elizabeth Haynes	16	Moore-County, North Carolina	North Carolina	—	Daughter
1920	Mary E. Haynes		Clarke, Georgia	Georgia	—	Daughter
1940	Mary Haynes	15	Oconee-County, South Carolina	South Carolina	—	Daughter
1930	Mary Haynes		Henrico, Virginia	Virginia	None	Daughter
1930	Mary K. Haynes		None, None	Georgia	Laborer	Daughter
1910	Mary C. Haynes		San Diego, California	Illinois	None	Wife
1910	Mary M Haynes		Carroll, Tennessee	Tennessee	—	Daughter
1930	Mary Haynes		Marshall, Alabama	Alabama	—	Wife

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About Mary Haynes US Census Records & Model Tree

We've indexed 4489 free, proprietary US Census records for Mary Haynes across 1900–1950, covering 50 states and DC: Alabama, Alaska, 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 4489 US Census records for Mary Haynes, from 1900 to 1950, across 50 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 Haynes'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 Haynes 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 Haynes records from the 1900 through 1950 US Federal Census, across 50 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.