How many Mary Lyons census records do you have?

We have 10605 US Census records for Mary Lyons, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Lyons 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 Lyons?

We have Mary Lyons 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 Lyons 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 Lyons?

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 Lyons — US Census Records & Model Tree

We found 10605 free census records for Mary Lyons across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1347 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Lyons Census Records by State & County

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Showing of 10605 records for Mary Lyons US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary A. Lyons	24	Plymouth-County, Massachusetts	Massachusetts	Table Work	Daughter
1930	Mary Lyons		Cook, Illinois	Illinois	Stenographer	Daughter
1910	Mary M Lyons		Essex, New Jersey	New Jersey	None	Daughter
1940	Mary Lyons	30	Suffolk-County, Massachusetts	Massachusetts	Bookkeeper	Daughter
1930	Mary Lyons		Norfolk, Massachusetts	Massachusetts	Dressmaker	Daughter
1900	Mary Lyons	39	Mchenry, Illinois	Wisconsin	—	Wife
1910	Mary E Lyons		Washington, Nebraska	Illinois	None	Wife
1920	Mary Lyons		Coshocton, Ohio	Scotland	None	Wife
1940	Mary Lyons	47	Bronx-County, New York	Ireland	—	Wife
1940	Mary B. Lyons	43	Kings-County, New York	New Jersey	—	Wife
1920	Mary Lyons		Cook, Illinois	Ireland	—	Head
1920	Mary B. Lyons		Guernsey, Ohio	Ohio	—	Wife
1920	Mary Lyons		Essex, New Jersey	Ireland	—	Head
1920	Mary Lyons		Suffolk, Massachusetts	Ireland	—	Head
1940	Mary L. Lyons	74	Hampden-County, Massachusetts	Connecticut	Registered Nurse	Head
1920	Mary E. Lyons		Middlesex, Massachusetts	Massachusetts	—	Wife
1920	Mary Agnes Lyons		Essex, Massachusetts	New Hampshire	—	Wife
1930	Mary F. Lyons		Schenectady, New York	Vermont	—	Head
1940	Mary Lyons	54	New-York-County, New York	Ireland	—	Wife
1920	Mary B. Lyons		Cuyahoga, Ohio	Ohio	—	Wife
1920	Mary Lyons		Providence, Rhode Island	Ireland	—	Wife
1920	Mary Lyons		New York, New York	Ireland	—	Head
1940	Mary Lyons	55	Kings-County, New York	Ireland	Apt. Supt.	Head
1940	Mary A. Lyons	55	Providence-County, Rhode Island	Rhode Island	—	Head
1940	Mary L. Lyons	16	Spokane-County, Washington	Washington	—	Daughter
1940	Mary Lyons	17	Lonoke-County, Arkansas	Arkansas	—	Daughter
1910	Mary Lyons		Rapides, Louisiana	Louisiana	—	Daughter
1940	Mary Louise Lyons	10	Providence-County, Rhode Island	Rhode Island	—	Daughter
1910	Mary Lyons		Philadelphia, Pennsylvania	England	—	Wife
1900	Mary Lyons	21	Hillsborough, New Hampshire	New Hampshire	Cotton Weaver	Daughter

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About Mary Lyons US Census Records & Model Tree

We've indexed 10605 free, proprietary US Census records for Mary Lyons across 1900–1950, covering 50 states, DC, and 1 territory: Alabama, Alaska, 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 Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, 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 10605 US Census records for Mary Lyons, 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 Lyons'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 Lyons 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 Lyons 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.

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