How many Mary Clancy census records do you have?

We have 3083 US Census records for Mary Clancy, from 1900 to 1950, across 45 states and DC.

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

Yes. All Mary Clancy 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 Clancy?

We have Mary Clancy records from the 1900 through 1950 US Federal Census, across 45 states and DC. Use the year and state filters to narrow your results.

How do I find Mary Clancy 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 Clancy?

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 Clancy — US Census Records & Model Tree

We found 3083 free census records for Mary Clancy across 6 census years (1900–1950), in 45 states and DC and 408 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Clancy Census Records by State & County

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Showing of 3083 records for Mary Clancy US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	Mary Clancy		Bronx, New York	Ireland	None	Head
1940	Mary Clancy	47	Orleans-County, Louisiana	Louisiana	—	Wife
1940	Mary Clancy	45	Queens-County, New York	Ireland	Housework	Head
1930	Mary Clancy		Kings, New York	Ireland	—	Wife
1940	Mary Clancy	53	Norfolk-County, Massachusetts	Ireland	—	Wife
1940	Mary Clancy	46	Kings-County, New York	New York	—	Wife
1940	Mary Clancy	55	Mcintosh-County, Georgia	Scotland	—	Wife
1900	Mary Clancy	45	Norfolk, Massachusetts	Ireland	—	Head
1940	Mary Clancy	50	Kings-County, New York	New York	Packer	Head
1940	Mary J Clancy	16	Knox-County, Tennessee	Maryland	—	Daughter
1940	Mary J Clancy	58	San-Francisco-County, California	California	—	Wife
1940	Mary K Clancy	16	Allegheny-County, Pennsylvania	Pennsylvania	—	Daughter
1930	Mary E Clancy		Suffolk, Massachusetts	Massachusetts	None	Wife
1930	Mary Clancy		Albany, New York	New York	Packer	Daughter
1920	Mary Clancy		San Francisco, California	California	None	Daughter
1910	Mary Clancy		New York, New York	Ireland	—	Wife
1930	Mary P. Clancy		Cumberland, Maine	Maine	Comptometer	Daughter
1930	Mary Clancy		Middlesex, Massachusetts	Massachusetts	—	Wife
1940	Mary Clancy	41	New-York-County, New York	New York	—	Wife
1940	Mary Clancy	29	New-York-County, New York	Irish Free State	Housewife	Wife
1940	Mary C Clancy	37	Middlesex-County, Massachusetts	Massachusetts	—	Wife
1930	Mary C Clancy		Fayette, Kentucky	Kentucky	—	Daughter
1940	Mary Clancy	16	Cayuga-County, New York	New York	—	Daughter
1930	Mary Clancy		Middlesex, Massachusetts	Massachusetts	—	Daughter
1940	Mary Clancy	29	Kings-County, New York	New York	Clerical Work	Daughter
1910	Mary Clancy		Kings, New York	Ireland	—	Wife
1930	Mary Clancy		Queens, New York	New York	—	Daughter
1940	Mary E Clancy	39	Hillsdale-County, Michigan	Pennsylvania	—	Wife
1940	Mary Clancy	36	New-York-County, New York	IRISH FREE STATE	—	Wife
1940	Mary Clancy	20	New-York-County, New York	New York	Salesgirl	Daughter

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About Mary Clancy US Census Records & Model Tree

We've indexed 3083 free, proprietary US Census records for Mary Clancy across 1900–1950, covering 45 states and DC: Alabama, Arizona, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, 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, 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 3083 US Census records for Mary Clancy, from 1900 to 1950, across 45 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 Clancy'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 Clancy 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 Clancy records from the 1900 through 1950 US Federal Census, across 45 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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