How many Mary Buchanan census records do you have?

We have 4643 US Census records for Mary Buchanan, from 1900 to 1950, across 49 states and DC.

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

Yes. All Mary Buchanan 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 Buchanan?

We have Mary Buchanan 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 Buchanan 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 Buchanan?

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 Buchanan — US Census Records & Model Tree

We found 4643 free census records for Mary Buchanan across 6 census years (1900–1950), in 49 states and DC and 1121 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Buchanan Census Records by State & County

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Showing of 4643 records for Mary Buchanan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary L Buchanan	23	Chickasaw-County, Mississippi	Mississippi	—	Wife
1940	Mary Buchanan	50	Chickasaw-County, Mississippi	Mississippi	Farm Labor	Wife
1940	Mary E. Buchanan	44	Bay-County, Florida	Georgia	—	Wife
1940	Mary Buchanan	45	Benton-County, Oregon	Nebraska	—	Wife
1940	Mary E. Buchanan	57	Dekalb-County, Georgia	Tennessee	—	Wife
1940	Mary Buchanan	47	Wise-County, Virginia	Virginia	—	Wife
1910	Mary Buchanan		Williamson, Tennessee	Tennessee	Laundress	Head
1930	Mary E Buchanan		Chickasaw, Mississippi	Mississippi	Laborer	Daughter
1940	Mary Lou Buchanan	19	Monroe-County, Mississippi	Mississippi	Helper	Daughter
1940	Mary A. Buchanan	40	Gilmer-County, Georgia	Tennessee	—	Wife
1940	Mary A Buchanan	46	Tazewell-County, Virginia	Virginia	—	Wife
1920	Mary Buchanan		Mitchell, North Carolina	North Carolina	—	Daughter
1930	Mary G. Buchanan		Humphreys, Tennessee	Tennessee	—	Daughter
1910	Mary F Buchanan		Augusta, Virginia	Virginia	—	Wife
1910	Mary Buchanan		New Castle, Delaware	Delaware	—	Daughter
1940	Mary Jane Buchanan	15	Davidson-County, Tennessee	Tennessee	—	Daughter
1940	Mary G. Buchanan	21	Smyth-County, Virginia	Virginia	New Worker	Daughter
1910	Mary G Buchanan		Somerset, New Jersey	Pennsylvania	—	Wife
1920	Mary Buchanan		Jackson, North Carolina	North Carolina	None	Daughter
1940	Mary Buchanan	17	Humphreys-County, Tennessee	Tennessee	N.Y.A. Secretary	Daughter
1940	Mary Buchanan	13	Mower-County, Minnesota	Minnesota	—	Daughter
1930	Mary G. Buchanan		Jackson, North Carolina	North Carolina	—	Daughter
1910	Mary Buchanan		Washington, Pennsylvania	Pennsylvania	—	Daughter
1910	Mary K Buchanan		Madison, Iowa	Pennsylvania	None	Wife
1930	Mary Y Buchanan		Tallapoosa, Alabama	Alabama	None	Wife
1930	Mary Buchanan		Camden, New Jersey	Pennsylvania	—	Wife
1930	Mary E. Buchanan		Harford, Maryland	Maryland	—	Daughter
1930	Mary E. Buchanan		Dane, Wisconsin	Wisconsin	—	Daughter
1940	Mary M. Buchanan	23	Wayne-County, Michigan	Scotland	Billing Machine	Daughter
1940	Mary Buchanan	30	Humphreys-County, Tennessee	Tennessee	—	Wife

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About Mary Buchanan US Census Records & Model Tree

We've indexed 4643 free, proprietary US Census records for Mary Buchanan across 1900–1950, covering 49 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, 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 4643 US Census records for Mary Buchanan, 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 Buchanan'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 Buchanan 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 Buchanan 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.

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