How many Mary Mccarthy census records do you have?

We have 17093 US Census records for Mary Mccarthy, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary 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 Mary Mccarthy?

We have Mary Mccarthy records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find Mary 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 Mary 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.

Mary Mccarthy — US Census Records & Model Tree

We found 17093 free census records for Mary Mccarthy across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 898 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Mccarthy Census Records by State & County

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Showing of 17093 records for Mary Mccarthy US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary J. Mccarthy	42	Providence-County, Rhode Island	Rhode Island	Teacher	Daughter
1920	Mary Mccarthy		Larimer, Colorado	Colorado	Teacher	Daughter
1920	Mary G Mccarthy		Morris, New Jersey	New Jersey	Billing Clerk	Daughter
1940	Mary Mccarthy	26	Sangamon-County, Illinois	Illinois	Coil Taper	Daughter
1940	Mary Francis Mccarthy	24	Fayette-County, Kentucky	Kentucky	Bookkeeper	Daughter
1940	Mary Mccarthy	21	Cook-County, Illinois	Illinois	Typist	Daughter
1940	Mary D. Mccarthy	33	Penobscot-County, Maine	Maine	Teacher	Daughter
1920	Mary Mccarthy		Maricopa, Arizona	Texas	—	Wife
1940	Mary E. Mccarthy	53	Suffolk-County, Massachusetts	Mass	—	Wife
1930	Mary Mccarthy		Suffolk, Massachusetts	Mass	—	Wife
1920	Mary Mccarthy		San Francisco, California	Maine	—	Head
1920	Mary Mccarthy		Suffolk, Massachusetts	England	—	Wife
1940	Mary E. Mccarthy	75	Middlesex-County, Massachusetts	Rhode Island	—	Wife
1940	Mary E. D. Mccarthy	66	Washington-County, Vermont	Rhode Island	—	Head
1920	Mary E. Mccarthy		Suffolk, Massachusetts	Rhode Island	—	Head
1940	Mary Mccarthy	73	Passaic-County, New Jersey	Scotland	—	Head
1930	Mary J. Mccarthy		Norfolk, Massachusetts	Massachusetts	—	Daughter
1940	Mary C. Mccarthy	20	St.-Louis-County, Missouri	Missouri	Stenographer	Daughter
1940	Mary Mccarthy	14	Northumberland-County, Pennsylvania	Pennsylvania	—	Daughter
1940	Mary A. Mccarthy	43	Worcester-County, Massachusetts	France	—	Wife
1920	Mary Mccarthy		Schuylkill, Pennsylvania	Pennsylvania	—	Daughter
1940	Mary Mccarthy	18	Cook-County, Illinois	Illinois	—	Daughter
1940	Mary Elaine Mccarthy	15	Denver-County, Colorado	Colorado	—	Daughter
1910	Mary A Mccarthy		Allegheny, Pennsylvania	England	—	Wife
1940	Mary Mccarthy	18	Anne-Arundel-County, Maryland	Maryland	Packer	Daughter
1920	Mary Mccarthy		Cook, Illinois	Illinois	—	Daughter
1940	Mary E. Mccarthy	13	Union-County, Ohio	Ohio	—	Daughter
1940	Mary M Mccarthy	44	Suffolk-County, Massachusetts	Massachusetts	—	Daughter
1940	Mary N Mccarthy	15	Stephens-County, Texas	Texas	—	Daughter
1940	Mary Mccarthy	36	Otoe-County, Nebraska	Nebraska	—	Wife

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About Mary Mccarthy US Census Records & Model Tree

We've indexed 17093 free, proprietary US Census records for Mary Mccarthy across 1900–1950, covering 50 states, DC, and 1 territory: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, 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 17093 US Census records for Mary Mccarthy, from 1900 to 1950, across 50 states, DC, and 1 territory.
: 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 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 Mary 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 Mary Mccarthy records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. 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 Helen Mccarthy James Mccarthy John Mccarthy Joseph Mccarthy Margaret Mccarthy Robert Mccarthy Thomas Mccarthy William Mccarthy

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