How many Mary Henderson census records do you have?

We have 14603 US Census records for Mary Henderson, from 1900 to 1950, across 48 states, DC, and 1 territory.

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

Yes. All Mary Henderson 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 Henderson?

We have Mary Henderson records from the 1900 through 1950 US Federal Census, across 48 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find Mary Henderson 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 Henderson?

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 Henderson — US Census Records & Model Tree

We found 14603 free census records for Mary Henderson across 6 census years (1900–1950), in 48 states, DC, and 1 territory and 2043 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Henderson Census Records by State & County

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Showing of 14603 records for Mary Henderson US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary S Henderson	57	Washington-County, Kansas	Iowa	Social Worker	Daughter
1940	Mary Henderson	44	Allegheny-County, Pennsylvania	Pennsylvania	—	Head
1910	Mary E Henderson		Christian, Kentucky	Kentucky	—	Wife
1940	Mary D. Henderson	47	Wabaunsee-County, Kansas	Kansas	—	Wife
1920	Mary Henderson		New York, New York	Ireland	None	Wife
1940	Mary J. Henderson	84	Cook-County, Illinois	Sweden	—	Head
1940	Mary Henderson	56	Weber-County, Utah	England	—	Wife
1940	Mary E. Henderson	61	Coshocton-County, Ohio	Ohio	—	Wife
1940	Mary S. Henderson	81	Essex-County, Massachusetts	Maine	—	Wife
1940	Mary Henderson	57	Harper-County, Kansas	Tennessee	—	Wife
1940	Mary M. Henderson	71	Wayne-County, Illinois	Illinois	—	Wife
1940	Mary Henderson	62	Gilmer-County, West Virginia	West Virginia	—	Wife
1920	Mary Henderson		Tuscola, Michigan	Ireland	Farmer	Head
1910	Mary A. Henderson		Greene, Pennsylvania	Pennsylvania	None	Wife
1910	Mary Henderson		Newberry, South Carolina	South Carolina	Laborer	Daughter
1910	Mary Henderson		Vance, North Carolina	North Carolina	—	Wife
1940	Mary Henderson	11	Arapahoe-County, Colorado	Colorado	—	Daughter
1910	Mary Henderson		Russell, Alabama	Alabama	—	Wife
1940	Mary Henderson	21	Cherokee-County, Oklahoma	Oklahoma	—	Daughter
1930	Mary Henderson		Allegheny, Pennsylvania	Pennsylvania	—	Daughter
1930	Mary E. Henderson		Burlington, New Jersey	New Jersey	—	Daughter
1920	Mary E. Henderson		New York, New York	New York	—	Wife
1930	Mary Henderson		Washington, Pennsylvania	Pennsylvania	—	Daughter
1930	Mary Henderson		Sunflower, Mississippi	Mississippi	Laborer	Daughter
1940	Mary M. Henderson	11	Warren-County, Ohio	Ohio	—	Daughter
1910	Mary Henderson		Cass, Texas	Texas	Labor	Wife
1940	Mary Henderson	17	Grundy-County, Illinois	Illinois	—	Daughter
1910	Mary J. Henderson		Essex, Massachusetts	Maine	—	Wife
1930	Mary Henderson		Greenville, South Carolina	South Carolina	—	Daughter
1920	Mary E Henderson		Tallapoosa, Alabama	Alabama	None	Daughter

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About Mary Henderson US Census Records & Model Tree

We've indexed 14603 free, proprietary US Census records for Mary Henderson across 1900–1950, covering 48 states, DC, and 1 territory: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, 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 14603 US Census records for Mary Henderson, from 1900 to 1950, across 48 states, DC, and 1 territory.
: 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 Henderson'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 Henderson 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 Henderson records from the 1900 through 1950 US Federal Census, across 48 states, DC, and 1 territory. 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 Henderson US Census Records

Alice Henderson Annie Henderson Charles Henderson Elizabeth Henderson Frank Henderson George Henderson Henry Henderson James Henderson John Henderson Joseph Henderson Margaret Henderson Robert Henderson Ruth Henderson Sarah Henderson Thomas Henderson William Henderson Willie Henderson

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