How many Mary Dwyer census records do you have?

We have 4874 US Census records for Mary Dwyer, from 1900 to 1950, across 47 states and DC.

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

Yes. All Mary Dwyer 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 Dwyer?

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

How do I find Mary Dwyer 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 Dwyer?

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 Dwyer — US Census Records & Model Tree

We found 4874 free census records for Mary Dwyer across 6 census years (1900–1950), in 47 states and DC and 540 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Dwyer Census Records by State & County

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Showing of 4874 records for Mary Dwyer US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary F Dwyer		Essex, Massachusetts	Massachusetts	Secretary	Daughter
1920	Mary Dwyer		New York, New York	Ireland	None	Wife
1940	Mary Dwyer	55	Bronx-County, New York	Ireland	—	Wife
1920	Mary Dwyer		New York, New York	Ireland	—	Head
1940	Mary A Dwyer	16	Providence-County, Rhode Island	Rhode Island	—	Daughter
1940	Mary Dwyer	20	Galveston-County, Texas	Texas	Stenographer	Daughter
1940	Mary J. Dwyer	20	Union-County, New Jersey	New Jersey	—	Daughter
1930	Mary A Dwyer		Essex, New Jersey	New Jersey	—	Daughter
1940	Mary Dwyer	16	Erie-County, New York	New York	—	Daughter
1940	Mary Dwyer	14	Suffolk-County, New York	New York	—	Daughter
1940	Mary K Dwyer	48	Middlesex-County, Massachusetts	New York	—	Wife
1930	Mary Ann Dwyer		La Crosse, Wisconsin	Wisconsin	—	Daughter
1930	Mary Dwyer		Silver Bow, Montana	Montana	None	Daughter
1940	Mary Dwyer	60	Onondaga-County, New York	New York	—	Wife
1940	Mary Dwyer	16	New-York-County, New York	New York	—	Daughter
1910	Mary Dwyer		Coles, Illinois	Ireland	—	Wife
1940	Mary Dwyer	19	Wayne-County, Michigan	Michigan	New Worker	Daughter
1940	Mary Dwyer	14	Kings-County, New York	New York	—	Daughter
1910	Mary Dwyer		Atlantic, New Jersey	Ireland	None	Wife
1910	Mary Dwyer		Middlesex, Massachusetts	Ireland	—	Wife
1940	Mary Dwyer	20	Vigo-County, Indiana	Indiana	New Worker	Daughter
1940	Mary Dwyer	31	Bronx-County, New York	New York	Teacher	Daughter
1910	Mary M Dwyer		Christian, Illinois	Illinois	—	Wife
1910	Mary G. Dwyer		Philadelphia, Pennsylvania	New York	—	Wife
1910	Mary Dwyer		Middlesex, Massachusetts	Ireland	—	Wife
1930	Mary N. Dwyer		Hudson, New Jersey	New Jersey	—	Daughter
1940	Mary L. Dwyer	17	Suffolk-County, Massachusetts	Massachusetts	—	Daughter
1940	Mary Jane Dwyer	15	Mason-County, Kentucky	Kentucky	—	Daughter
1910	Mary Dwyer		Kings, New York	Ireland	—	Wife
1940	Mary E. Dwyer	54	Middlesex-County, Massachusetts	New Hampshire	—	Wife

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About Mary Dwyer US Census Records & Model Tree

We've indexed 4874 free, proprietary US Census records for Mary Dwyer across 1900–1950, covering 47 states and DC: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, 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, 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 4874 US Census records for Mary Dwyer, from 1900 to 1950, across 47 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 Dwyer'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 Dwyer 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 Dwyer records from the 1900 through 1950 US Federal Census, across 47 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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