How many Mary Clifford census records do you have?

We have 3332 US Census records for Mary Clifford, from 1900 to 1950, across 47 states and DC.

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

Yes. All Mary Clifford 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 Clifford?

We have Mary Clifford 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 Clifford 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 Clifford?

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 Clifford — US Census Records & Model Tree

We found 3332 free census records for Mary Clifford across 6 census years (1900–1950), in 47 states and DC and 602 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Clifford Census Records by State & County

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Showing of 3332 records for Mary Clifford US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Clifford		New York, New York	New York	—	Daughter
1940	Mary Clifford	24	New-York-County, New York	New York	—	Daughter
1920	Mary A. Clifford		Kings, New York	Ireland	Housewife	Wife
1940	Mary W Clifford	59	Essex-County, Massachusetts	Maine	—	Wife
1940	Mary B Clifford	74	Middlesex-County, Massachusetts	England	—	Wife
1940	Mary Clifford	43	Spalding-County, Georgia	Georgia	—	Wife
1940	Mary Clifford	71	Queens-County, New York	Ireland	—	Wife
1920	Mary J Clifford		Orange, California	Ohio	None	Head
1930	Mary Clifford		Suffolk, Massachusetts	Scotland	Inspector	Daughter
1940	Mary E. Clifford	26	Summit-County, Ohio	Tennessee	—	Wife
1940	Mary Clifford	13	Suffolk-County, Massachusetts	Massachusetts	—	Daughter
1940	Mary Patricia Clifford	11	Carroll-County, Indiana	Indiana	—	Daughter
1930	Mary Clifford		Cook, Illinois	Illinois	Stenographer	Daughter
1930	Mary Clifford		Kings, New York	Ireland	—	Wife
1940	Mary Clifford	39	Suffolk-County, Massachusetts	Irish Free State	—	Wife
1920	Mary Clifford		Hampshire, Massachusetts	Massachusetts	Waitress	Daughter
1930	Mary A Clifford		Franklin, Ohio	Ohio	—	Wife
1920	Mary Clifford		Philadelphia, Pennsylvania	Pennsylvania	—	Daughter
1920	Mary Clifford		None, None	New York	—	Daughter
1940	Mary Clifford	51	New-Haven-County, Connecticut	Ireland	—	Wife
1940	Mary Clifford	14	Bergen-County, New Jersey	New York	—	Daughter
1940	Mary Clifford	17	Kings-County, New York	New York	—	Daughter
1930	Mary J. Clifford		Allegheny, Pennsylvania	Pennsylvania	—	Daughter
1920	Mary Clifford		Middlesex, Massachusetts	Massachusetts	Packer	Daughter
1940	Mary Clifford	11	Suffolk-County, Massachusetts	Massachusetts	—	Daughter
1910	Mary D. Clifford		Westmoreland, Pennsylvania	Pennsylvania	—	Wife
1940	Mary Ellen Clifford	11	Wayne-County, Michigan	Michigan	—	Daughter
1940	Mary Rose Clifford	23	Erie-County, New York	New York	Private Secretary	Daughter
1940	Mary Ruth Clifford	15	Hamilton-County, Ohio	Ohio	—	Daughter
1930	Mary G. Clifford		Essex, Massachusetts	Maine	—	Wife

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About Mary Clifford US Census Records & Model Tree

We've indexed 3332 free, proprietary US Census records for Mary Clifford across 1900–1950, covering 47 states and DC: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, 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 3332 US Census records for Mary Clifford, 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 Clifford'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 Clifford 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 Clifford 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.