How many Mary Allen census records do you have?

We have 33764 US Census records for Mary Allen, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Allen 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 Allen?

We have Mary Allen records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find Mary Allen 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 Allen?

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 Allen — US Census Records & Model Tree

We found 33764 free census records for Mary Allen across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 2527 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Allen Census Records by State & County

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Showing of 33764 records for Mary Allen US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary B Allen		Albemarle, Virginia	Virginia	Salesmanager	Son
1920	Mary Allen		Hinds, Mississippi	Mississippi	—	Daughter
1940	Mary Allen	22	Wells-County, Indiana	Indiana	New Worker	Daughter
1940	Mary E Allen	29	Cuyahoga-County, Ohio	Ohio	File Clerk	Daughter
1940	Mary E. Allen	22	Wake-County, North Carolina	North Carolina	—	Daughter
1910	Mary E Allen		Pike, Illinois	Illinois	—	Daughter
1940	Mary Allen	28	Collin-County, Texas	Texas	—	Daughter
1940	Mary Allen	23	Vigo-County, Indiana	Indiana	—	Wife
1940	Mary Allen	42	Catawba-County, North Carolina	North Carolina	Looper	Head
1930	Mary E. Allen		Middlesex, Massachusetts	Massachusetts	—	Wife
1940	Mary Allen	45	Pottawatomie-County, Oklahoma	Oklahoma	—	Wife
1940	Mary A Allen	52	New-York-County, New York	Ireland	—	Wife
1940	Mary Allen	46	Will-County, Illinois	Indiana	—	Wife
1920	Mary Allen		Elbert, Georgia	Georgia	Laborer	Wife
1940	Mary Allen	45	Bibb-County, Georgia	Georgia	—	Wife
1940	Mary Allen	55	Sangamon-County, Illinois	Missouri	—	Wife
1910	Mary B. Allen		Chariton, Missouri	West Virginia	—	Wife
1940	Mary Allen	35	Barren-County, Kentucky	Kentucky	Cook	Head
1940	Mary Allen	70	Philadelphia-County, Pennsylvania	Lithuania	—	Wife
1940	Mary M. Allen	66	Grayson-County, Texas	Texas	—	Wife
1940	Mary Allen	61	Philadelphia-County, Pennsylvania	Delaware	Housewife	Wife
1920	Mary A. Allen		Middlesex, Massachusetts	Maine	—	Wife
1910	Mary E Allen		Cecil, Maryland	Maryland	Washerwoman	Wife
1940	Mary E. Allen	81	Calhoun-County, Alabama	Alabama	Housework	Head
1940	Mary Allen	72	Faulkner-County, Arkansas	Mississippi	—	Wife
1920	Mary Allen		Shawnee, Kansas	Ohio	—	Wife
1940	Mary Allen	56	Bay-County, Michigan	Ohio	Housewife	Wife
1940	Mary E. Allen	71	Owen-County, Indiana	Indiana	—	Wife
1940	Mary A. Allen	50	Hanover-County, Virginia	Virginia	No	Wife
1930	Mary E. Allen		Oklahoma, Oklahoma	Illinois	—	Head

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About Mary Allen US Census Records & Model Tree

We've indexed 33764 free, proprietary US Census records for Mary Allen across 1900–1950, covering 50 states, DC, and 1 territory: 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, 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 33764 US Census records for Mary Allen, from 1900 to 1950, across 50 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 Allen'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 Allen 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 Allen records from the 1900 through 1950 US Federal Census, across 50 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.