How many Mary Sims census records do you have?

We have 5212 US Census records for Mary Sims, from 1900 to 1950, across 49 states and DC.

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

Yes. All Mary Sims 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 Sims?

We have Mary Sims 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 Sims 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 Sims?

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 Sims — US Census Records & Model Tree

We found 5212 free census records for Mary Sims across 6 census years (1900–1950), in 49 states and DC and 1263 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Sims Census Records by State & County

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Showing of 5212 records for Mary Sims US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	Mary Sims		Madison, Mississippi	Mississippi	—	Head
1910	Mary Sims		Wayne, Michigan	Michigan	—	Daughter
1900	Mary Sims	25	Buncombe, North Carolina	North Carolina	Washerwoman	Wife
1940	Mary Sims	44	Tipton-County, Tennessee	Tennessee	—	Wife
1930	Mary Ann Sims		Multnomah, Oregon	Scotland	Housework	Wife
1910	Mary M Sims		Columbia, Oregon	Kentucky	—	Wife
1940	Mary E. Sims	47	Fayette-County, West Virginia	West Virginia	—	Wife
1940	Mary Sims	56	Jefferson-County, Alabama	Alabama	—	Head
1910	Mary Sims		Coweta, Georgia	Georgia	Laborer	Wife
1910	Mary Sims		Conecuh, Alabama	Alabama	Farm Laborer	Daughter
1900	Mary R. Sims	15	Pope, Arkansas	Arkansas	Farm Laborer	Daughter
1910	Mary Sims		Holmes, Mississippi	Mississippi	Farm Laborer	Wife
1930	Mary Lee Sims		Union, North Carolina	North Carolina	Teacher	Daughter
1930	Mary Sims		Wilkes, Georgia	Georgia	Laborer	Daughter
1900	Mary Sims	4	Kemper, Mississippi	Mississippi	—	Daughter
1940	Mary Sims	35	Cook-County, Illinois	Texas	—	Wife
1930	Mary Sims		Oglethorpe, Georgia	Georgia	Laborer	Daughter
1910	Mary E Sims		Franklin, Alabama	Alabama	—	Wife
1910	Mary Sims		Butler, Alabama	Alabama	None	Wife
1940	Mary Sims	38	Marengo-County, Alabama	Alabama	—	Wife
1940	Mary Sims	16	Autauga-County, Alabama	Alabama	—	Daughter
1930	Mary Sims		Marlboro, South Carolina	South Carolina	—	Daughter
1910	Mary M Sims		None, None	Virginia	—	Daughter
1930	Mary Sims		Jefferson, Alabama	Alabama	—	Daughter
1930	Mary Sims		Kittitas, Washington	Oklahoma	—	Daughter
1920	Mary Sims		Anderson, South Carolina	South Carolina	—	Wife
1940	Mary E. Sims	12	Collin-County, Texas	Texas	—	Daughter
1900	Mary Sims	7	Newberry, South Carolina	South Carolina	—	Daughter
1920	Mary Sims		Lee, Georgia	Georgia	—	Daughter
1930	Mary Sims		Fairfield, South Carolina	South Carolina	—	Daughter

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About Mary Sims US Census Records & Model Tree

We've indexed 5212 free, proprietary US Census records for Mary Sims across 1900–1950, covering 49 states and DC: 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 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 5212 US Census records for Mary Sims, 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 Sims'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 Sims 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 Sims 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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