How many Mary Hardy census records do you have?

We have 6433 US Census records for Mary Hardy, from 1900 to 1950, across 50 states and DC.

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

Yes. All Mary Hardy 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 Hardy?

We have Mary Hardy records from the 1900 through 1950 US Federal Census, across 50 states and DC. Use the year and state filters to narrow your results.

How do I find Mary Hardy 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 Hardy?

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 Hardy — US Census Records & Model Tree

We found 6433 free census records for Mary Hardy across 6 census years (1900–1950), in 50 states and DC and 1401 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

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Showing of 6433 records for Mary Hardy US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1910	Mary Hardy		Lowndes, Alabama	Alabama	Laborer	Daughter
1920	Mary Hardy		Pitt, North Carolina	North Carolina	—	Daughter
1940	Mary E. Hardy	29	Greenwood-County, South Carolina	South Carolina	Teacher	Daughter
1930	Mary L. Hardy		Harris, Texas	Texas	—	Daughter
1920	Mary Hardy		Hennepin, Minnesota	Iowa	Nurse	Daughter
1940	Mary Hardy	25	Middlesex-County, Massachusetts	Massachusetts	—	Wife
1940	Mary Kathleen Hardy	21	Onondaga-County, New York	New York	Stationary Fireman	Daughter
1940	Mary Nell Hardy	22	Sunflower-County, Mississippi	Mississippi	—	Wife
1920	Mary A. Hardy		Montgomery, Ohio	Ohio	Assistant Secretary	Daughter
1910	Mary L. Hardy		Idaho, Idaho	Illinois	None	Wife
1940	Mary E. Hardy	49	Washington-County, Maryland	Maryland	Housekeeper	Wife
1940	Mary Hardy	45	Dinwiddie-County, Virginia	Virginia	Laborer	Head
1900	Mary Hardy	18	Lowndes, Alabama	Alabama	Day Hand	Wife
1940	Mary A. Hardy	78	Newton-County, Mississippi	Mississippi	—	Head
1940	Mary E. Hardy	63	Kent-County, Michigan	Rhode Island	—	Wife
1940	Mary Hardy	59	Columbia-County, Arkansas	Louisiana	—	Wife
1920	Mary Hardy		Middlesex, New Jersey	New Jersey	Keeper	Head
1940	Mary E. Hardy	62	Delaware-County, Pennsylvania	Newfoundland	—	Head
1910	Mary A Hardy		Cook, Illinois	Vermont	—	Head
1940	Mary Hardy	13	Roanoke-County, Virginia	Virginia	—	Daughter
1920	Mary Hardy		Columbia, Georgia	Georgia	—	Daughter
1940	Mary Hardy	16	Middlesex-County, Massachusetts	Massachusetts	—	Daughter
1940	Mary Hardy	41	Middlesex-County, Massachusetts	Massachusetts	—	Wife
1910	Mary Hardy		Craven, North Carolina	North Carolina	Farm Laborer	Daughter
1910	Mary E. Hardy		Rockingham, North Carolina	Virginia	—	Daughter
1930	Mary F Hardy		Fulton, Kentucky	Kentucky	—	Daughter
1920	Mary Hardy		Marion, Tennessee	Tennessee	—	Daughter
1910	Mary C Hardy		Lunenburg, Virginia	Virginia	—	Wife
1930	Mary Hardy		Shelby, Tennessee	Tennessee	—	Daughter
1930	Mary Hardy		Middlesex, Massachusetts	Massachusetts	—	Wife

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About Mary Hardy US Census Records & Model Tree

We've indexed 6433 free, proprietary US Census records for Mary Hardy across 1900–1950, covering 50 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, 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 6433 US Census records for Mary Hardy, from 1900 to 1950, across 50 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 Hardy'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 Hardy 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 Hardy records from the 1900 through 1950 US Federal Census, across 50 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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