How many Mary Byrne census records do you have?

We have 5711 US Census records for Mary Byrne, from 1900 to 1950, across 48 states and DC.

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

Yes. All Mary Byrne 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 Byrne?

We have Mary Byrne records from the 1900 through 1950 US Federal Census, across 48 states and DC. Use the year and state filters to narrow your results.

How do I find Mary Byrne 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 Byrne?

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 Byrne — US Census Records & Model Tree

We found 5711 free census records for Mary Byrne across 6 census years (1900–1950), in 48 states and DC and 594 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Byrne Census Records by State & County

Records per state:

Census Record Search

First Name

Middle Name

Last Name (Required)

Census Year

State

Birth Year

Year Range

Birthplace

Age From

Age To

Exact match: Name Location Year

Alternate First Names (comma-separated)

Alternate Last Names (comma-separated)

County

Sex

Marital Status

Race

Relationship to Head

Occupation

Census Page ID

Family Members (in same household)

Search Records

Showing of 5711 records for Mary Byrne US Census, ranked by Model Tree richness

No records match your filters.

Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary L. Byrne	23	Stark-County, Ohio	Ohio	—	Daughter
1920	Mary Byrne		Essex, New Jersey	New Jersey	Stenographer	Daughter
1940	Mary Byrne	26	Winnebago-County, Illinois	Illinois	Stenographer	Daughter
1920	Mary J. Byrne		Multnomah, Oregon	Oregon	—	Daughter
1940	Mary Ellen Byrne	33	Calhoun-County, Michigan	Michigan	Beautician	Daughter
1910	Mary Byrne		New York, New York	Ireland	Proprietor	Head
1920	Mary G Byrne		New York, New York	Ireland	—	Wife
1940	Mary E. Byrne	69	Philadelphia-County, Pennsylvania	Scotland	—	Wife
1930	Mary Byrne		Cook, Illinois	Ireland	—	Head
1920	Mary Byrne		New York, New York	Ireland	—	Head
1940	Mary A Byrne	20	Contra-Costa-County, California	California	Checker	Daughter
1930	Mary Byrne		Hampden, Massachusetts	Ireland	—	Wife
1940	Mary Jane Byrne	22	St.-Louis-City-County, Missouri	Missouri	New Worker	Daughter
1940	Mary Byrne	39	Marquette-County, Wisconsin	Wisconsin	—	Wife
1920	Mary Byrne		Nelson, North Dakota	Iowa	—	Daughter
1930	Mary Byrne		Essex, New Jersey	New Jersey	Saleslady	Daughter
1910	Mary Byrne		Hudson, New Jersey	New Jersey	—	Daughter
1930	Mary G Byrne		Daviess, Kentucky	Kentucky	—	Daughter
1930	Mary M Byrne		Cook, Illinois	Illinois	—	Wife
1930	Mary Byrne		Essex, New Jersey	New Jersey	—	Daughter
1940	Mary Byrne	23	Cook-County, Illinois	Illinois	—	Daughter
1930	Mary Byrne		New York, New York	Ireland	Packer	Daughter
1910	Mary Byrne		Cook, Illinois	Illinois	—	Wife
1940	Mary Byrne	16	Berkshire-County, Massachusetts	Massachusetts	—	Daughter
1940	Mary Byrne	54	Stark-County, Ohio	Ohio	—	Daughter
1910	Mary D. Byrne		Sarpy, Nebraska	Illinois	—	Wife
1940	Mary Byrne	17	Le-Sueur-County, Minnesota	Minnesota	—	Daughter
1930	Mary Byrne		Cook, Illinois	Illinois	—	Wife
1940	Mary A Byrne	17	Ramsey-County, Minnesota	Minnesota	—	Daughter
1940	Mary Margaret Byrne	12	Jackson-County, Missouri	Missouri	—	Daughter

Load More Mary Byrne Census Records

About Mary Byrne US Census Records & Model Tree

We've indexed 5711 free, proprietary US Census records for Mary Byrne across 1900–1950, covering 48 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, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, 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 5711 US Census records for Mary Byrne, from 1900 to 1950, across 48 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 Byrne'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 Byrne 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 Byrne records from the 1900 through 1950 US Federal Census, across 48 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 Byrne US Census Records

James Byrne John Byrne

All Byrne census records →

Browse More Surnames

Burnett Burns Burton Bush Butler Byrd Cahill Cain Caldwell Calhoun Callahan Cameron

← Back to US Census Records