How many Mary Cowan census records do you have?

We have 2890 US Census records for Mary Cowan, from 1900 to 1950, across 49 states and DC.

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

Yes. All Mary Cowan 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 Cowan?

We have Mary Cowan records from the 1900 through 1950 US Federal Census, across 49 states and DC. Use the year and state filters to narrow your results.

How do I find Mary Cowan 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 Cowan?

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 Cowan — US Census Records & Model Tree

We found 2890 free census records for Mary Cowan across 6 census years (1900–1950), in 49 states and DC and 906 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Cowan Census Records by State & County

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Showing of 2890 records for Mary Cowan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	Mary E. Cowan		Philadelphia, Pennsylvania	New Jersey	None	Wife
1940	Mary E. Cowan	77	Franklin-County, Tennessee	Tennessee	—	Head
1910	Mary Cowan		Holmes, Florida	Florida	—	Wife
1940	Mary Cowan	14	Rowan-County, North Carolina	North Carolina	—	Daughter
1910	Mary F Cowan		Somerset, Maine	Maine	—	Wife
1940	Mary Margaret Cowan	19	Custer-County, Colorado	Colorado	Stenographer	Daughter
1930	Mary Cowan		Rock, Wisconsin	Wisconsin	None	Daughter
1910	Mary P Cowan		Franklin, Tennessee	Tennessee	—	Daughter
1910	Mary E. Cowan		Yakima, Washington	Washington	—	Daughter
1940	Mary G. Cowan	11	Tarrant-County, Texas	Texas	—	Daughter
1940	Mary B. Cowan	14	Bertie-County, North Carolina	North Carolina	—	Daughter
1940	Mary Catherine Cowan	24	Tarrant-County, Texas	Texas	Secretary	Daughter
1930	Mary E. Cowan		Travis, Texas	Texas	—	Daughter
1940	Mary E Cowan	18	Allen-County, Indiana	Indiana	—	Daughter
1940	Mary Harris Cowan	36	Martin-County, North Carolina	North Carolina	—	Wife
1940	Mary G Cowan	25	Knox-County, Tennessee	Tennessee	Seamstress	Daughter
1920	Mary Cowan		Davidson, Tennessee	Tennessee	—	Daughter
1940	Mary Cowan	44	Polk-County, Arkansas	Arkansas	—	Wife
1930	Mary G. Cowan		Pottawatomie, Oklahoma	Missouri	—	Wife
1920	Mary Cowan		Davidson, Tennessee	Tennessee	—	Daughter
1930	Mary Cowan		St Louis, Missouri	Illinois	—	Wife
1940	Mary R. Cowan	35	Smith-County, Tennessee	Tennessee	—	Wife
1940	Mary A. Cowan	21	White-County, Arkansas	Arkansas	House Work	Daughter
1940	Mary Cowan	20	Bronx-County, New York	New York	—	Daughter
1940	Mary Clyde Cowan	13	Fulton-County, Georgia	Georgia	—	Daughter
1940	Mary Cowan	51	Sullivan-County, Tennessee	Florida	—	Wife
1930	Mary L. Cowan		Fulton, Georgia	Georgia	—	Daughter
1930	Mary V. Cowan		Jackson, Missouri	Missouri	None	Daughter
1930	Mary Elizabeth Cowan		Jackson, Missouri	Missouri	—	Daughter
1910	Mary L. Cowan		Etowah, Alabama	Florida	—	Wife

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About Mary Cowan US Census Records & Model Tree

We've indexed 2890 free, proprietary US Census records for Mary Cowan across 1900–1950, covering 49 states and DC: Alabama, Alaska, 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 Mexico, 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 2890 US Census records for Mary Cowan, from 1900 to 1950, across 49 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 Cowan'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 Cowan 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 Cowan records from the 1900 through 1950 US Federal Census, across 49 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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