How many Mary Cronin census records do you have?

We have 4436 US Census records for Mary Cronin, from 1900 to 1950, across 50 states and DC.

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

Yes. All Mary Cronin 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 Cronin?

We have Mary Cronin 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 Cronin 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 Cronin?

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 Cronin — US Census Records & Model Tree

We found 4436 free census records for Mary Cronin across 6 census years (1900–1950), in 50 states and DC and 431 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 4436 records for Mary Cronin US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary M. Cronin	44	Portage-County, Ohio	Ohio	—	Wife
1920	Mary E. Cronin		Suffolk, Massachusetts	Ireland	—	Wife
1920	Mary Cronin		Middlesex, Massachusetts	Ireland	—	Wife
1930	Mary Cronin		San Francisco, California	Ireland	—	Wife
1910	Mary E. Cronin		New York, New York	Ireland	Janitress	Wife
1920	Mary Cronin		Essex, Massachusetts	Ireland	—	Wife
1900	Mary Cronin	46	Philadelphia, Pennsylvania	Ireland	General Housework	Head
1920	Mary Cronin		Worcester, Massachusetts	Massachusetts	—	Wife
1930	Mary Cronin		Bronx, New York	Ireland	None	Wife
1940	Mary Cronin	64	Essex-County, Massachusetts	Ireland	—	Wife
1930	Mary Cronin		Essex, Massachusetts	New Hampshire	—	Head
1940	Mary Cronin	73	Walworth-County, Wisconsin	Wisconsin	None	Head
1910	Mary Cronin		Middlesex, Massachusetts	Ireland	None	Wife
1940	Mary Cronin	58	Queens-County, New York	Ireland	—	Head
1910	Mary Cronin		New York, New York	Ireland	Office Cleaner	Head
1940	Mary Cronin	66	Allegheny-County, Pennsylvania	Scotland	—	Head
1930	Mary Cronin		Wayne, Michigan	Michigan	—	Daughter
1920	Mary E Cronin		Denver, Colorado	Colorado	Trained Nurse	Daughter
1940	Mary Cronin	68	Worcester-County, Massachusetts	Ireland	Housework	Head
1940	Mary Cronin	21	Suffolk-County, Massachusetts	Massachusetts	Clerk	Daughter
1900	Mary Cronin	48	Christian, Illinois	Ireland	—	Head
1940	Mary E. Cronin	16	Middlesex-County, Massachusetts	Massachusetts	—	Daughter
1930	Mary T. Cronin		Douglas, Nebraska	Nebraska	—	Daughter
1930	Mary Cronin		Middlesex, Massachusetts	Massachusetts	Clerk	Daughter
1940	Mary Cronin	45	New-York-County, New York	Ireland	—	Wife
1940	Mary A. Cronin	19	Suffolk-County, Massachusetts	Massachusetts	New Worker	Daughter
1940	Mary Cronin	42	Chemung-County, New York	Pennsylvania	—	Wife
1940	Mary Cronin	50	Cook-County, Illinois	Irish Free State	—	Wife
1940	Mary Cronin	15	New-York-County, New York	New York	—	Daughter
1940	Mary Cronin	50	Cook-County, Illinois	Illinois	Teacher	Daughter

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About Mary Cronin US Census Records & Model Tree

We've indexed 4436 free, proprietary US Census records for Mary Cronin 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 4436 US Census records for Mary Cronin, 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 Cronin'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 Cronin 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 Cronin 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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