How many Mary Farrell census records do you have?

We have 9051 US Census records for Mary Farrell, from 1900 to 1950, across 50 states and DC.

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

Yes. All Mary Farrell 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 Farrell?

We have Mary Farrell 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 Farrell 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 Farrell?

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 Farrell — US Census Records & Model Tree

We found 9051 free census records for Mary Farrell across 6 census years (1900–1950), in 50 states and DC and 955 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Farrell Census Records by State & County

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Showing of 9051 records for Mary Farrell US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Farrell	21	Hudson-County, New Jersey	New Jersey	Clerk	Daughter
1930	Mary E. Farrell		Providence, Rhode Island	Rhode Island	None	Daughter
1930	Mary Farrell		Kings, New York	England	—	Head
1910	Mary Farrell		New York, New York	Ireland	None	Head
1940	Mary Farrell	52	Hudson-County, New Jersey	New Jersey	—	Wife
1940	Mary A. Farrell	51	Queens-County, New York	Connecticut	—	Wife
1910	Mary Farrell		New York, New York	Ireland	—	Wife
1920	Mary Farrell		Providence, Rhode Island	Ireland	None	Head
1940	Mary Farrell	37	Bronx-County, New York	Ireland	—	Wife
1920	Mary Farrell		Philadelphia, Pennsylvania	Ireland	—	Wife
1910	Mary Farrell		New York, New York	Ireland	—	Wife
1920	Mary E Farrell		Providence, Rhode Island	England	None	Head
1940	Mary E. Farrell	43	Harrison-County, West Virginia	Maryland	—	Wife
1940	Mary C. Farrell	38	Providence-County, Rhode Island	Rhode Island	—	Wife
1940	Mary Farrell	65	Westchester-County, New York	Ireland	—	Head
1920	Mary Farrell		Cook, Illinois	Ireland	—	Wife
1940	Mary Farrell	74	Chester-County, Pennsylvania	Ireland	—	Wife
1930	Mary Farrell		Kings, New York	Brooklyn	Housewife	Wife
1920	Mary Farrell		Los Angeles, California	Ireland	None	Wife
1930	Mary S Farrell		Johnson, Kansas	Illinois	—	Wife
1940	Mary C. Farrell	60	Madison-County, Illinois	Illinois	Laborer	Head
1940	Mary Farrell	59	New-York-County, New York	Ireland	Cleaning Floorwoman	Head
1940	Mary Farrell	73	Westchester-County, New York	Ireland	—	Head
1930	Mary Farrell		Rensselaer, New York	Ireland	—	Wife
1930	Mary E. Farrell		Allegheny, Pennsylvania	Pennsylvania	—	Daughter
1940	Mary Farrell	46	Blair-County, Pennsylvania	Pennsylvania	—	Wife
1930	Mary E Farrell		Rutland, Vermont	Vermont	—	Wife
1900	Mary Farrell	16	New York, New York	England	—	Daughter
1940	Mary E. Farrell	46	King-County, Washington	Montana	—	Wife
1930	Mary Farrell		Essex, New Jersey	Ireland	—	Wife

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About Mary Farrell US Census Records & Model Tree

We've indexed 9051 free, proprietary US Census records for Mary Farrell 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 9051 US Census records for Mary Farrell, 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 Farrell'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 Farrell 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 Farrell 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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