How many Mary Nelson census records do you have?

We have 27940 US Census records for Mary Nelson, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Nelson 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 Nelson?

We have Mary Nelson 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 Nelson 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 Nelson?

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 Nelson — US Census Records & Model Tree

We found 27940 free census records for Mary Nelson across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 2506 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Nelson Census Records by State & County

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Showing of 27940 records for Mary Nelson US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Nelson		Georgetown, South Carolina	South Carolina	Washer Woman	Daughter
1940	Mary Nelson	29	Orleans-County, Louisiana	Louisiana	Stenographer	Daughter
1940	Mary Nelson	32	Madison-County, Tennessee	Tennessee	Telephone Operator	Daughter
1920	Mary Nelson		St Louis, Minnesota	Finland	—	Wife
1900	Mary E Nelson	49	Owen, Indiana	Ohio	Farmer	Head
1910	Mary Nelson		Hennepin, Minnesota	Norway	None	Wife
1940	Mary Nelson	40	Baltimore-City-County, Maryland	Maryland	Housewife	Wife
1920	Mary L. Nelson		San Francisco, California	Ireland	None	Wife
1920	Mary Nelson		Ramsey, Minnesota	Norway	—	Wife
1940	Mary Nelson	56	Clinton-County, Iowa	Iowa	—	Wife
1940	Mary Nelson	52	New-York-County, New York	Russia	—	Wife
1930	Mary Nelson		Wayne, Michigan	Canada	—	Wife
1940	Mary Nelson	50	Hudson-County, New Jersey	New Jersey	—	Wife
1940	Mary Nelson	58	Pierce-County, Washington	Finland	—	Head
1940	Mary Nelson	40	New-Castle-County, Delaware	Delaware	—	Wife
1940	Mary Nelson	36	Columbia-County, Florida	Florida	Same Place	Wife
1940	Mary M Nelson	52	Yakima-County, Washington	Wyoming	—	Wife
1920	Mary A Nelson		Olmsted, Minnesota	Iowa	None	Wife
1940	Mary Nelson	45	Muscogee-County, Georgia	Georgia	Seamstress	Wife
1940	Mary Nelson	59	Alameda-County, California	Finland	—	Wife
1940	Mary Nelson	63	Bayfield-County, Wisconsin	Finland	Farmer	Head
1940	Mary A. W. Nelson	57	Gwinnett-County, Georgia	Georgia	—	Wife
1940	Mary E. Nelson	54	Rosebud-County, Montana	Montana	—	Wife
1940	Mary Nelson	65	Kings-County, New York	Ireland	—	Head
1930	Mary D W Nelson		Plymouth, Massachusetts	Massachusetts	—	Head
1940	Mary D. Nelson	44	Multnomah-County, Oregon	Oregon	Stenographer	Head
1940	Mary Nelson	51	Worcester-County, Massachusetts	Finland	—	Wife
1930	Mary E Nelson		Jefferson, Kentucky	Kentucky	—	Head
1920	Mary E Nelson		Johnson, Kansas	Indiana	—	Head
1920	Mary E Nelson		Middlesex, Massachusetts	New Hampshire	—	Head

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About Mary Nelson US Census Records & Model Tree

We've indexed 27940 free, proprietary US Census records for Mary Nelson across 1900–1950, covering 50 states, DC, and 1 territory: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, 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, 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 27940 US Census records for Mary Nelson, 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 Nelson'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 Nelson 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 Nelson 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.

Other Nelson US Census Records

Agnes Nelson Albert Nelson Alfred Nelson Alice Nelson Alma Nelson Andrew Nelson Anna Nelson Annie Nelson Arthur Nelson Bertha Nelson Betty Nelson Carl Nelson Carrie Nelson Charles Nelson Clara Nelson Clarence Nelson David Nelson Donald Nelson Doris Nelson Dorothy Nelson Earl Nelson Edith Nelson Edna Nelson Edward Nelson Edwin Nelson Elizabeth Nelson Ella Nelson Ellen Nelson Elmer Nelson Emma Nelson Ernest Nelson Esther Nelson Ethel Nelson Evelyn Nelson Florence Nelson Frank Nelson Fred Nelson George Nelson Gertrude Nelson Gladys Nelson Grace Nelson Hans Nelson Harold Nelson Harry Nelson Hazel Nelson Helen Nelson Henry Nelson Herbert Nelson Hilda Nelson Howard Nelson Ida Nelson Irene Nelson James Nelson Jennie Nelson Jessie Nelson John Nelson Joseph Nelson Julia Nelson Kenneth Nelson Laura Nelson Lillian Nelson Lillie Nelson Lois Nelson Louis Nelson Mabel Nelson Margaret Nelson Marie Nelson Martha Nelson Martin Nelson Mildred Nelson Minnie Nelson Myrtle Nelson Nellie Nelson Nels Nelson Oscar Nelson Paul Nelson Peter Nelson Ralph Nelson Raymond Nelson Richard Nelson Robert Nelson Roy Nelson Ruth Nelson Sarah Nelson Thomas Nelson Walter Nelson William Nelson Willie Nelson

All Nelson census records →

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