How many Mary Alexander census records do you have?

We have 14229 US Census records for Mary Alexander, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Alexander 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 Alexander?

We have Mary Alexander 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 Alexander 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 Alexander?

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 Alexander — US Census Records & Model Tree

We found 14229 free census records for Mary Alexander across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1962 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Alexander Census Records by State & County

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Showing of 14229 records for Mary Alexander US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Alexander		Lafayette, Louisiana	Louisiana	—	Daughter
1940	Mary Alexander	28	East-Baton-Rouge-County, Louisiana	Louisiana	—	Wife
1930	Mary Alexander		Camden, New Jersey	New Jersey	Paper Cutter	Daughter
1940	Mary Alexander	24	Lackawanna-County, Pennsylvania	Pennsylvania	Saleslady	Daughter
1940	Mary L. Alexander	20	Shawnee-County, Kansas	Kansas	—	Daughter
1910	Mary Alexander		Oconee, South Carolina	South Carolina	—	Daughter
1930	Mary L. Alexander		Citrus, Florida	Florida	—	Daughter
1920	Mary Alexander		Allegheny, Pennsylvania	England	—	Head
1930	Mary A. Alexander		Darke, Ohio	Ohio	—	Head
1940	Mary Alexander	46	Wayne-County, Michigan	Italy	—	Wife
1940	Mary E. Alexander	63	Jackson-County, Missouri	Scotland	—	Wife
1920	Mary E Alexander		Union, Oregon	Kentucky	—	Wife
1940	Mary Alexander	54	Bristol-County, Massachusetts	Azores	Housekeeper	Wife
1900	Mary Alexander	60	Hudson, New Jersey	Scotland	—	Head
1940	Mary Alexander	57	Bristol-County, Massachusetts	Portugal	H	Wife
1940	Mary W Alexander	57	Uinta-County, Wyoming	Nebraska	—	Wife
1940	Mary Alexander	69	Morris-County, Kansas	Illinois	—	Wife
1920	Mary Alexander		Bronx, New York	New York	—	Head
1920	Mary A. Alexander		Rockingham, New Hampshire	New Hampshire	None	Wife
1940	Mary Lou Alexander	61	Caddo-County, Louisiana	Louisiana	—	Head
1940	Mary A Alexander	70	Columbia-County, Wisconsin	Wisconsin	—	Head
1920	Mary Alexander		Alameda, California	Portugal	None	Wife
1940	Mary Alexander	19	Henry-County, Tennessee	Tennessee	Laundress	Daughter
1930	Mary Alexander		Wayne, Michigan	Italy	—	Wife
1940	Mary Alexander	21	Monongalia-County, West Virginia	West Virginia	—	Daughter
1940	Mary Alexander	12	Shelby-County, Alabama	Alabama	—	Daughter
1930	Mary E. Alexander		Mercer, Pennsylvania	Pennsylvania	—	Daughter
1940	Mary Alexander	42	Bolivar-County, Mississippi	Mississippi	Farm Laborer	Wife
1910	Mary Alexander		Pickens, South Carolina	South Carolina	Farm Laborer	Wife
1930	Mary Alexander		Wake, North Carolina	North Carolina	—	Wife

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About Mary Alexander US Census Records & Model Tree

We've indexed 14229 free, proprietary US Census records for Mary Alexander across 1900–1950, covering 50 states, DC, and 1 territory: 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, 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 14229 US Census records for Mary Alexander, 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 Alexander'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 Alexander 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 Alexander 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.