How many Mary Swanson census records do you have?

We have 4208 US Census records for Mary Swanson, from 1900 to 1950, across 49 states and DC.

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

Yes. All Mary Swanson 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 Swanson?

We have Mary Swanson 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 Swanson 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 Swanson?

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 Swanson — US Census Records & Model Tree

We found 4208 free census records for Mary Swanson across 6 census years (1900–1950), in 49 states and DC and 937 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Swanson Census Records by State & County

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Showing of 4208 records for Mary Swanson US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	Mary Swanson		Alameda, California	California	—	Daughter
1940	Mary Swanson	63	Big-Horn-County, Wyoming	Iowa	—	Wife
1920	Mary Swanson		Cook, Illinois	Denmark	Milliner	Wife
1930	Mary Swanson		Shelby, Illinois	Norway	—	Head
1920	Mary J. Swanson		Montgomery, Pennsylvania	Pennsylvania	Tire Worker	Daughter
1910	Mary L. Swanson		Clay, North Carolina	Georgia	—	Wife
1940	Mary Dee Swanson	19	Cherokee-County, Kansas	Kansas	School Teacher	Daughter
1940	Mary Swanson	19	Winnebago-County, Illinois	Illinois	Hand Sander	Daughter
1930	Mary A. Swanson		Pittsylvania, Virginia	Virginia	—	Daughter
1940	Mary Swanson	23	Nash-County, North Carolina	North Carolina	—	Daughter
1930	Mary M Swanson		Cobb, Georgia	Georgia	—	Daughter
1940	Mary E. Swanson	10	Wapello-County, Iowa	Iowa	—	Daughter
1940	Mary Swanson	74	Cook-County, Illinois	Sweden	—	Wife
1940	Mary Swanson	55	Aitkin-County, Minnesota	Sweden	—	Wife
1940	Mary Swanson	43	Cook-County, Illinois	Illinois	—	Wife
1940	Mary Lou Swanson	11	Cook-County, Illinois	Illinois	—	Daughter
1940	Mary Swanson	25	Macon-County, Missouri	Missouri	—	Daughter
1940	Mary A. Swanson	10	Snohomish-County, Washington	Washington	—	Daughter
1940	Mary Swanson	21	Kings-County, New York	New York	—	Daughter
1940	Mary C. Swanson	54	Stevens-County, Minnesota	Minnesota	—	Wife
1940	Mary L. Swanson	33	Crockett-County, Tennessee	Tennessee	—	Daughter
1940	Mary Lou Swanson	12	Ramsey-County, Minnesota	Minnesota	—	Daughter
1940	Mary Lou Swanson	13	Chautauqua-County, New York	New York	—	Daughter
1940	Mary Swanson	38	Los-Angeles-County, California	Scotland	No	Daughter
1930	Mary Swanson		Hennepin, Minnesota	Sweden	—	Wife
1940	Mary A Swanson	16	Cook-County, Illinois	Illinois	—	Daughter
1940	Mary Helen Swanson	12	Wayne-County, Michigan	Michigan	—	Daughter
1940	Mary E. Swanson	52	Erie-County, Pennsylvania	Pennsylvania	—	Wife
1940	Mary Swanson	24	El-Paso-County, Colorado	Colorado	Chamber Maid	Daughter
1940	Mary E. Swanson	30	Denver-County, Colorado	Colorado	—	Daughter

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About Mary Swanson US Census Records & Model Tree

We've indexed 4208 free, proprietary US Census records for Mary Swanson 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 4208 US Census records for Mary Swanson, 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 Swanson'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 Swanson 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 Swanson 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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