How many Mary Long census records do you have?

We have 21041 US Census records for Mary Long, from 1900 to 1950, across 50 states and DC.

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

Yes. All Mary Long 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 Long?

We have Mary Long 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 Long 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 Long?

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 Long — US Census Records & Model Tree

We found 21041 free census records for Mary Long across 6 census years (1900–1950), in 50 states and DC and 2233 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Long Census Records by State & County

Records per state:

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Showing of 21041 records for Mary Long US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	"""Mary ("""")""" Long	29	Carroll-County, Georgia	Georgia	—	Wife
1920	Mary Long		Shelby, Tennessee	Tennessee	—	Daughter
1920	Mary Long		New Castle, Delaware	Delaware	Operator	Daughter
1920	Mary A Long		Sussex, Delaware	Delaware	—	Daughter
1940	Mary Long	28	Los-Angeles-County, California	California	—	Wife
1920	Mary Long		Cheshire, New Hampshire	New Hampshire	Operator	Daughter
1940	Mary Long	34	Franklin-County, Kentucky	Kentucky	Glassware	Wife
1940	Mary Long	35	Fulton-County, Georgia	Georgia	—	Wife
1920	Mary E. Long		Page, Virginia	Virginia	None	Daughter
1940	Mary Long	23	Hampshire-County, Massachusetts	Massachusetts	Waitress	Daughter
1940	Mary K. Long	20	Fulton-County, Illinois	Illinois	—	Daughter
1940	Mary L. Long	22	Rutherford-County, North Carolina	North Carolina	—	Daughter
1910	Mary Long		Okanogan, Washington	Utah	—	Wife
1920	Mary E. Long		Columbus, North Carolina	North Carolina	Farmer	Head
1920	Mary Long		Cheshire, New Hampshire	Ireland	None	Wife
1940	Mary Agnes Long	54	Hennepin-County, Minnesota	England	Elevator Opr	Wife
1940	Mary E Long	52	Kent-County, Michigan	Michigan	—	Wife
1920	Mary J. Long		Greene, Indiana	Indiana	None	Wife
1920	Mary W Long		Wayne, Michigan	Scotland	None	Wife
1920	Mary Long		Lee, Mississippi	Mississippi	—	Wife
1940	Mary E. Long	28	Somerset-County, New Jersey	New Jersey	Deliverer Papers	Wife
1940	Mary E. Long	63	Rockingham-County, Virginia	Virginia	—	Wife
1920	Mary A. Long		Johnson, Missouri	Indiana	—	Wife
1940	Mary E Long	68	Howard-County, Missouri	Missouri	—	Wife
1910	Mary Long		Philadelphia, Pennsylvania	Ireland	None	Wife
1930	Mary Long		Bronx, New York	Connecticut	—	Head
1940	Mary Long	56	Northampton-County, Pennsylvania	Germany	—	Head
1940	Mary Long	56	Union-County, New Jersey	New Jersey	House Cleaner	Wife
1940	Mary E. Long	16	Caswell-County, North Carolina	North Carolina	—	Daughter
1940	Mary M. Long	11	Morgan-County, Tennessee	Tennessee	—	Daughter

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About Mary Long US Census Records & Model Tree

We've indexed 21041 free, proprietary US Census records for Mary Long 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 21041 US Census records for Mary Long, 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 Long'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 Long 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 Long 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.