How many Mary Blackburn census records do you have?

We have 3003 US Census records for Mary Blackburn, from 1900 to 1950, across 48 states and DC.

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

Yes. All Mary Blackburn 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 Blackburn?

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

How do I find Mary Blackburn 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 Blackburn?

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 Blackburn — US Census Records & Model Tree

We found 3003 free census records for Mary Blackburn across 6 census years (1900–1950), in 48 states and DC and 852 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Blackburn Census Records by State & County

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Showing of 3003 records for Mary Blackburn US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary C. Blackburn	31	Posey-County, Indiana	Indiana	—	Daughter
1920	Mary W Blackburn		Essex, Massachusetts	England	—	Wife
1920	Mary E Blackburn		Pottawatomie, Oklahoma	Texas	None	Wife
1940	Mary Blackburn	46	Pueblo-County, Colorado	Colorado	—	Wife
1940	Mary Blackburn	66	Middlesex-County, Massachusetts	New Hampshire	—	Wife
1940	Mary Blackburn	71	Caldwell-County, Kentucky	Kentucky	—	Wife
1940	Mary M. Blackburn	76	Pike-County, Indiana	Indiana	Proprietor	Head
1940	Mary K. Blackburn	18	Shelby-County, Kentucky	Kentucky	—	Daughter
1930	Mary L Blackburn		Duplin, North Carolina	North Carolina	—	Daughter
1920	Mary Ruth Blackburn		Bryan, Oklahoma	Oklahoma	—	Daughter
1910	Mary J. Jr. Blackburn		Fremont, Idaho	Utah	—	Daughter
1940	Mary Blackburn	44	Caddo-County, Oklahoma	Oklahoma	—	Wife
1920	Mary Blackburn		Montgomery, Ohio	Kentucky	—	Wife
1940	Mary M Blackburn	11	Athens-County, Ohio	Ohio	—	Daughter
1930	Mary Blackburn		Talladega, Alabama	Alabama	—	Wife
1940	Mary Blackburn	35	Labette-County, Kansas	Kansas	—	Wife
1930	Mary L. Blackburn		Dekalb, Georgia	Georgia	None	Daughter
1930	Mary E. Blackburn		Dekalb, Georgia	Georgia	None	Wife
1930	Mary J Blackburn		Jenkins, Georgia	Georgia	—	Daughter
1930	Mary Blackburn		Richmond, Georgia	Georgia	—	Daughter
1940	Mary Blackburn	18	Stark-County, Ohio	Ohio	New Worker	Daughter
1940	Mary Blackburn	40	Jefferson-County, Kentucky	Kentucky	Maid	Wife
1920	Mary D. Blackburn		Lamar, Mississippi	Mississippi	—	Daughter
1940	Mary Blackburn	48	Johnson-County, Tennessee	Tennessee	—	Wife
1930	Mary M Blackburn		Edgar, Illinois	Illinois	None	Daughter
1940	Mary Blackburn	44	White-County, Indiana	Indiana	—	Wife
1940	Mary Blackburn	11	Fayette-County, West Virginia	West Virginia	—	Daughter
1940	Mary A. Blackburn	12	Love-County, Oklahoma	Oklahoma	—	Daughter
1940	Mary E. G. Blackburn	56	Philadelphia-County, Pennsylvania	Pennsylvania	Saleslady	Head
1910	Mary A. Blackburn		Ashe, North Carolina	North Carolina	—	Daughter

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About Mary Blackburn US Census Records & Model Tree

We've indexed 3003 free, proprietary US Census records for Mary Blackburn across 1900–1950, covering 48 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, 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 3003 US Census records for Mary Blackburn, from 1900 to 1950, across 48 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 Blackburn'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 Blackburn 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 Blackburn records from the 1900 through 1950 US Federal Census, across 48 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.