How many Mary Hartman census records do you have?

We have 6230 US Census records for Mary Hartman, from 1900 to 1950, across 48 states and DC.

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

Yes. All Mary Hartman 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 Hartman?

We have Mary Hartman 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 Hartman 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 Hartman?

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 Hartman — US Census Records & Model Tree

We found 6230 free census records for Mary Hartman across 6 census years (1900–1950), in 48 states and DC and 1031 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Hartman Census Records by State & County

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Showing of 6230 records for Mary Hartman US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Lou Hartman	32	Washington-County, Mississippi	Mississippi	Operator	Daughter
1940	Mary Hartman	30	Mercer-County, New Jersey	New Jersey	Retail Grocery Store	Wife
1920	Mary E. Hartman		Camden, New Jersey	New Jersey	—	Daughter
1940	Mary Hartman	64	Allegheny-County, Pennsylvania	France	—	Wife
1940	Mary Hartman	51	Rush-County, Kansas	Russia	—	Wife
1940	Mary E. Hartman	74	Franklin-County, Ohio	Ohio	Postal Employee	Wife
1940	Mary Hartman	43	Hamilton-County, Tennessee	Tennessee	—	Wife
1920	Mary E. Hartman		York, Pennsylvania	Pennsylvania	—	Wife
1940	Mary C Hartman	66	Baltimore-City-County, Maryland	Maryland	Grocery Store	Head
1940	Mary M. Hartman	65	Posey-County, Indiana	Indiana	—	Head
1910	Mary L. Hartman		Pendleton, West Virginia	West Virginia	—	Daughter
1940	Mary A. Hartman	14	Atchison-County, Missouri	Missouri	Farm Laborer	Daughter
1930	Mary E Hartman		Grant, West Virginia	West Virginia	—	Wife
1930	Mary Hartman		Morton, North Dakota	Russia	—	Wife
1910	Mary B Hartman		Carroll, Illinois	Illinois	—	Wife
1940	Mary Hartman	18	Gove-County, Kansas	Kansas	Houseworker	Daughter
1940	Mary L. Hartman	36	Roanoke-County, Virginia	Virginia	—	Wife
1940	Mary Hartman	23	Erie-County, New York	New York	Housework	Daughter
1940	Mary Hartman	12	Seneca-County, New York	New York	—	Daughter
1940	Mary Lee Hartman	14	Mesa-County, Colorado	Colorado	Farm Laborer	Daughter
1910	Mary Hartman		Wood, Ohio	Ohio	—	Wife
1940	Mary H. Hartman	40	Allegheny-County, Pennsylvania	Pennsylvania	—	Wife
1910	Mary Hartman		Kings, New York	Germany	—	Wife
1910	Mary Hartman		Scott, Minnesota	Minnesota	—	Wife
1940	Mary Hartman	20	Madison-County, Illinois	Illinois	Granite Worker	Daughter
1940	Mary Jean Hartman	13	Allegheny-County, Pennsylvania	Pennsylvania	—	Daughter
1930	Mary H. Hartman		Atlantic, New Jersey	New Jersey	—	Daughter
1940	Mary E Hartman	54	Idaho-County, Idaho	Indiana	6	Wife
1940	Mary Hartman	24	Middlesex-County, New Jersey	New Jersey	Machine Operator	Daughter
1940	Mary Hartman	46	Livingston-County, Illinois	Illinois	—	Wife

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About Mary Hartman US Census Records & Model Tree

We've indexed 6230 free, proprietary US Census records for Mary Hartman across 1900–1950, covering 48 states and DC: Alabama, 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, Utah, 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 6230 US Census records for Mary Hartman, 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 Hartman'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 Hartman 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 Hartman 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.

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