How many Mary Harrison census records do you have?

We have 15023 US Census records for Mary Harrison, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Harrison 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 Harrison?

We have Mary Harrison 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 Harrison 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 Harrison?

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 Harrison — US Census Records & Model Tree

We found 15023 free census records for Mary Harrison across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 2060 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Harrison Census Records by State & County

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Showing of 15023 records for Mary Harrison US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Harrison	28	Madison-County, Louisiana	Louisiana	School Teacher	Daughter
1940	Mary Harrison	24	Queens-County, New York	New York	Voucher Clerk	Daughter
1900	Mary Harrison	3	Marion, Indiana	Indiana	—	Daughter
1900	Mary Harrison		Fairfield, South Carolina	South Carolina	—	Daughter
1920	Mary Harrison		Monroe, New York	New York	Teacher	Daughter
1940	Mary Harrison	39	Newton-County, Mississippi	Mississippi	—	Daughter
1920	Mary E. Harrison		Whitley, Indiana	Indiana	Stenographer	Daughter
1940	Mary Harrison	55	Delta-County, Michigan	Sweden	—	Wife
1940	Mary Harrison	74	Benton-County, Arkansas	Texas	—	Wife
1920	Mary Harrison		Pickett, Tennessee	Kentucky	—	Wife
1940	Mary Harrison	46	Duval-County, Florida	S Carolina	—	Wife
1920	Mary M. Harrison		Frederick, Maryland	Maryland	—	Wife
1930	Mary E Harrison		Sequoyah, Oklahoma	Alabama	—	Head
1940	Mary Ann Harrison	82	Allegheny-County, Pennsylvania	England	—	Head
1900	Mary E Harrison	61	Caroline, Maryland	Delaware	—	Wife
1940	Mary Harrison	50	Silver-Bow-County, Montana	Montana	—	Wife
1940	Mary Jane Harrison	64	Bristol-County, Massachusetts	England	Cloth Inspector	Wife
1940	Mary Harrison	55	Greenbrier-County, West Virginia	Virginia	—	Wife
1920	Mary Harrison		Greenwood, South Carolina	South Carolina	—	Wife
1940	Mary Harrison	66	Allegheny-County, Pennsylvania	Wales	Janitress	Head
1940	Mary Harrison	54	Bristol-County, Massachusetts	England	Speeder Tender	Wife
1940	Mary Harrison	51	Jackson-County, Florida	Virginia	Laundress	Head
1940	Mary Harrison	72	Mendocino-County, California	Finland	—	Wife
1940	Mary C. Harrison	54	Grayson-County, Texas	Missouri	—	Head
1940	Mary Harrison	14	Rockingham-County, North Carolina	North Carolina	—	Daughter
1940	Mary Harrison	38	St.-Tammany-County, Louisiana	Louisiana	—	Wife
1910	Mary E. Harrison		Scott, Arkansas	Tennessee	None	Wife
1940	Mary L. Harrison	13	Barren-County, Kentucky	Kentucky	—	Daughter
1930	Mary E. Harrison		Brunswick, Virginia	Virginia	—	Daughter
1920	Mary Harrison		Baltimore, Maryland	Maryland	Cook	Daughter

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About Mary Harrison US Census Records & Model Tree

We've indexed 15023 free, proprietary US Census records for Mary Harrison 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 15023 US Census records for Mary Harrison, 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 Harrison'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 Harrison 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 Harrison 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.