How many Mary Carr census records do you have?

We have 9420 US Census records for Mary Carr, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Carr 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 Carr?

We have Mary Carr 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 Carr 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 Carr?

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 Carr — US Census Records & Model Tree

We found 9420 free census records for Mary Carr across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1529 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Carr Census Records by State & County

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Showing of 9420 records for Mary Carr US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Jane Carr	23	Putnam-County, Ohio	Ohio	In School	Daughter
1940	Mary B. Carr	23	Providence-County, Rhode Island	Rhode Island	—	Daughter
1940	Mary E. Carr	27	Middlesex-County, Massachusetts	Massachusetts	—	Daughter
1940	Mary Carr	28	Salt-Lake-County, Utah	Utah	Stenographer	Daughter
1900	Mary E Carr	23	Burlington, New Jersey	New Jersey	4	Wife
1930	Mary A. Carr		Providence, Rhode Island	Rhode Island	Spinner	Head
1920	Mary Carr		Allegheny, Pennsylvania	Austria	—	Wife
1940	Mary Carr	68	Newport-County, Rhode Island	Rhode Island	—	Wife
1920	Mary A. Carr		Delaware, Pennsylvania	England	—	Wife
1940	Mary Carr	49	New-York-County, New York	Ireland	—	Wife
1940	Mary E. Carr	51	Wayne-County, Michigan	Michigan	—	Wife
1920	Mary A Carr		New York, New York	Ireland	—	Head
1910	Mary N Carr		Duplin, North Carolina	North Carolina	None	Wife
1940	Mary Carr	52	Allegheny-County, Pennsylvania	Ireland	—	Wife
1920	Mary Carr		Philadelphia, Pennsylvania	Ireland	—	Head
1940	Mary Carr	69	Essex-County, New Jersey	Ireland	—	Wife
1940	Mary Ann Carr	59	Wapello-County, Iowa	England	—	Wife
1940	Mary Carr	57	Muscogee-County, Georgia	Florida	—	Head
1940	Mary Carr	20	Greene-County, Pennsylvania	West Virginia	—	Daughter
1920	Mary E. Carr		Attala, Mississippi	Mississippi	—	Daughter
1920	Mary J. Carr		Bladen, North Carolina	North Carolina	—	Wife
1940	Mary E. Carr	12	Cumberland-County, Illinois	Illinois	—	Daughter
1930	Mary Carr		Westchester, New York	Virginia	Laundry	Wife
1940	Mary Carr	13	Miami-County, Ohio	Ohio	—	Daughter
1910	Mary Carr		Pitt, North Carolina	North Carolina	—	Daughter
1910	Mary Carr		Pitt, North Carolina	North Carolina	—	Wife
1910	Mary Carr		Allegheny, Pennsylvania	Minnesota	Laundress	Daughter
1940	Mary Carr	23	Wyandotte-County, Kansas	Kansas	Seamstress	Daughter
1940	Mary L. Carr	12	Hemphill-County, Texas	Texas	—	Daughter
1940	Mary L. Carr	11	Bristol-City-County, Virginia	Indiana	—	Daughter

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About Mary Carr US Census Records & Model Tree

We've indexed 9420 free, proprietary US Census records for Mary Carr 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 9420 US Census records for Mary Carr, 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 Carr'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 Carr 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 Carr 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.