How many Mary Shea census records do you have?

We have 9840 US Census records for Mary Shea, from 1900 to 1950, across 47 states, DC, and 1 territory.

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

Yes. All Mary Shea 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 Shea?

We have Mary Shea records from the 1900 through 1950 US Federal Census, across 47 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find Mary Shea 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 Shea?

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 Shea — US Census Records & Model Tree

We found 9840 free census records for Mary Shea across 6 census years (1900–1950), in 47 states, DC, and 1 territory and 631 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Shea Census Records by State & County

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Showing of 9840 records for Mary Shea US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Shea	48	Kern-County, California	Colorado	—	Head
1930	Mary Shea		New York, New York	Ireland	—	Wife
1940	Mary Shea	69	Worcester-County, Massachusetts	Ireland	—	Head
1940	Mary Shea	43	Cook-County, Illinois	Illinois	—	Wife
1940	Mary Shea	64	Woodbury-County, Iowa	Iowa	—	Wife
1930	Mary Shea		Bristol, Massachusetts	Rhode Island	—	Head
1930	Mary A Shea		Suffolk, Massachusetts	England	—	Wife
1940	Mary E. Shea	53	Merrimack-County, New Hampshire	New Hampshire	—	Wife
1940	Mary Shea	46	Richmond-County, New York	Ireland	Housekeeper	Wife
1940	Mary Shea	60	Queens-County, New York	Ireland	—	Wife
1940	Mary Shea	74	Suffolk-County, Massachusetts	Ireland	—	Head
1930	Mary Shea		Kings, New York	Ireland	—	Head
1940	Mary Shea	77	Hampden-County, Massachusetts	Ireland	—	Head
1940	Mary P Shea	51	Suffolk-County, Massachusetts	Ireland	—	Head
1930	Mary Shea		St Clair, Illinois	Missouri	None	Head
1940	Mary M. Shea	30	Alameda-County, California	California	Teacher	Daughter
1920	Mary Shea		Emmons, North Dakota	South Dakota	—	Daughter
1910	Mary Shea		Allegheny, Pennsylvania	Pennsylvania	—	Daughter
1910	Mary Shea		Scott, Minnesota	Minnesota	—	Daughter
1910	Mary S Shea		Hillsborough, New Hampshire	New Hampshire	—	Daughter
1910	Mary C Shea		Allegheny, Pennsylvania	Wales	—	Wife
1930	Mary H Shea		Cumberland, Maine	Maine	—	Wife
1930	Mary Shea		Cuyahoga, Ohio	Ohio	—	Daughter
1930	Mary Shea		Cook, Illinois	Illinois	—	Daughter
1940	Mary Shea	17	Luzerne-County, Pennsylvania	Pennsylvania	—	Daughter
1920	Mary C Shea		Baltimore, Maryland	Maryland	None	Daughter
1920	Mary E. Shea		Providence, Rhode Island	Rhode Island	—	Daughter
1940	Mary Shea	21	Essex-County, New Jersey	New Jersey	Packer	Daughter
1940	Mary C. Shea	48	Multnomah-County, Oregon	Washington	—	Wife
1930	Mary Shea		Providence, Rhode Island	Rhode Island	Spinner	Daughter

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About Mary Shea US Census Records & Model Tree

We've indexed 9840 free, proprietary US Census records for Mary Shea across 1900–1950, covering 47 states, DC, and 1 territory: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, 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 9840 US Census records for Mary Shea, from 1900 to 1950, across 47 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 Shea'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 Shea 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 Shea records from the 1900 through 1950 US Federal Census, across 47 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.

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