How many Helen Mccarthy census records do you have?

We have 3255 US Census records for Helen Mccarthy, from 1900 to 1950, across 46 states and DC.

What's in a Helen Mccarthy census record?

You'll see Helen'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 Helen Mccarthy'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 Helen Mccarthy census records free?

Yes. All Helen Mccarthy 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 Helen Mccarthy?

We have Helen Mccarthy records from the 1900 through 1950 US Federal Census, across 46 states and DC. Use the year and state filters to narrow your results.

How do I find Helen Mccarthy 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 Helen Mccarthy?

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.

Helen Mccarthy — US Census Records & Model Tree

We found 3255 free census records for Helen Mccarthy across 6 census years (1900–1950), in 46 states and DC and 359 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Helen Mccarthy Census Records by State & County

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Showing of 3255 records for Helen Mccarthy US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1910	Helen Mccarthy		Essex, Massachusetts	Massachusetts	—	Daughter
1930	Helen Mccarthy		Essex, Massachusetts	Massachusetts	Twisting	Daughter
1940	Helen Mccarthy	23	Daviess-County, Kentucky	Kentucky	Seamstress	Daughter
1940	Helen Mccarthy	23	Delaware-County, Pennsylvania	Pennsylvania	Saleslady	Daughter
1930	Helen Mccarthy		Denver, Colorado	Colorado	None	Daughter
1940	Helen Mccarthy	23	Suffolk-County, Massachusetts	Massachusetts	—	Daughter
1940	Helen Mccarthy	24	Kings-County, New York	New York	Labeler	Daughter
1940	Helen Mccarthy	47	Essex-County, Massachusetts	Massachusetts	Telephone Operator	Daughter
1930	Helen F. Mccarthy		Middlesex, Massachusetts	Massachusetts	Floor Lady	Daughter
1930	Helen Mccarthy		Cook, Illinois	Illinois	Stenographer	Daughter
1940	Helen Mccarthy	37	Kings-County, New York	New York	Steno.	Daughter
1930	Helen Mccarthy		Ontario, New York	New York	Manager	Daughter
1930	Helen W Mccarthy		Middlesex, Massachusetts	Massachusetts	Clerk	Daughter
1940	Helen Mccarthy	31	Kent-County, Michigan	Michigan	Teacher	Daughter
1940	Helen C Mccarthy	37	Essex-County, Massachusetts	Massachusetts	Secretary	Daughter
1940	Helen Mccarthy	25	Erie-County, New York	New York	Waitress	Daughter
1930	Helen Mccarthy		New York, New York	New York	Secretary	Daughter
1940	Helen Mccarthy	73	Will-County, Illinois	Illinois	—	Head
1940	Helen E. Mccarthy	56	Suffolk-County, Massachusetts	Massachusetts	—	Wife
1930	Helen Mccarthy		Kings, New York	New York	—	Daughter
1930	Helen Mccarthy		Cook, Illinois	Illinois	—	Daughter
1920	Helen M. Mccarthy		Worcester, Massachusetts	Massachusetts	Stenographer	Daughter
1940	Helen Mccarthy	16	Lackawanna-County, Pennsylvania	Pennsylvania	—	Daughter
1940	Helen Mccarthy	38	Denver-County, Colorado	Colorado	—	Wife
1940	Helen Mccarthy	18	Daviess-County, Kentucky	Kentucky	Farmer	Daughter
1930	Helen C Mccarthy		Philadelphia, Pennsylvania	Pennsylvania	Operator	Daughter
1940	Helen Mccarthy	45	Outagamie-County, Wisconsin	Wisconsin	—	Wife
1940	Helen Mccarthy	40	Kings-County, New York	New York	—	Wife
1910	Helen E Mccarthy		Suffolk, Massachusetts	Massachusetts	—	Daughter
1940	Helen Mccarthy	14	Providence-County, Rhode Island	Rhode Island	—	Daughter

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About Helen Mccarthy US Census Records & Model Tree

We've indexed 3255 free, proprietary US Census records for Helen Mccarthy across 1900–1950, covering 46 states and DC: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, 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, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, 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 Helen 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 3255 US Census records for Helen Mccarthy, from 1900 to 1950, across 46 states and DC.
: You'll see Helen'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 Helen Mccarthy'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 Helen Mccarthy 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 Helen Mccarthy records from the 1900 through 1950 US Federal Census, across 46 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.

Other Mccarthy US Census Records

Anna Mccarthy Catherine Mccarthy Charles Mccarthy Daniel Mccarthy Edward Mccarthy Elizabeth Mccarthy James Mccarthy John Mccarthy Joseph Mccarthy Margaret Mccarthy Mary Mccarthy Robert Mccarthy Thomas Mccarthy William Mccarthy

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