How many Mary Washington census records do you have?

We have 9376 US Census records for Mary Washington, from 1900 to 1950, across 48 states and DC.

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

Yes. All Mary Washington 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 Washington?

We have Mary Washington records from the 1900 through 1950 US Federal Census, across 48 states and DC. Use the year and state filters to narrow your results.

How do I find Mary Washington 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 Washington?

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 Washington — US Census Records & Model Tree

We found 9376 free census records for Mary Washington across 6 census years (1900–1950), in 48 states and DC and 1126 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Washington Census Records by State & County

Records per state:

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Showing of 9376 records for Mary Washington US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Washington		Lee, South Carolina	South Carolina	Laborer	Daughter
1940	Mary Washington	20	Warren-County, Mississippi	Mississippi	—	Daughter
1940	Mary Washington	20	Allegheny-County, Pennsylvania	Pennsylvania	—	Daughter
1910	Mary S Washington		Charles, Maryland	Maryland	None	Daughter
1930	Mary Washington		Georgetown, South Carolina	South Carolina	—	Daughter
1940	Mary Washington	41	Sumter-County, Alabama	Alabama	Laundress	Wife
1940	Mary Washington	42	Charleston-County, South Carolina	South Carolina	Laborer	Wife
1940	Mary Washington	43	Dorchester-County, Maryland	Maryland	—	Wife
1940	Mary E Washington	46	Jefferson-County, Kentucky	Kentucky	—	Wife
1900	Mary Washington	52	Hinds, Mississippi	Mississippi	Nurse	Head
1940	Mary Washington	50	Robertson-County, Tennessee	Kentucky	—	Wife
1940	Mary Washington	47	Caddo-County, Louisiana	Louisiana	Farmer	Head
1940	Mary Washington	42	Franklin-County, Ohio	Virginia	No	Head
1930	Mary Washington		Philadelphia, Pennsylvania	Virginia	Housework	Head
1940	Mary Washington	67	Cooke-County, Texas	Texas	—	Head
1940	Mary Washington	11	Loudoun-County, Virginia	Virginia	—	Daughter
1930	Mary Washington		Sumter, Alabama	Alabama	—	Daughter
1920	Mary Washington		Montgomery, Maryland	Maryland	—	Daughter
1930	Mary H. Washington		Jefferson, Texas	Louisiana	—	Head
1910	Mary Washington		Shelby, Tennessee	Tennessee	—	Daughter
1940	Mary Washington	43	Holmes-County, Mississippi	Mississippi	Farm Help	Wife
1930	Mary Washington		Washington, District of Columbia	Maryland	—	Wife
1940	Mary Washington	34	Baltimore-City-County, Maryland	Virginia	House Work	Wife
1940	Mary D. Washington	13	San-Jacinto-County, Texas	Texas	—	Daughter
1910	Mary L Washington		Shelby, Tennessee	Tennessee	—	Daughter
1940	Mary Washington	16	Brooks-County, Georgia	Georgia	—	Daughter
1940	Mary Washington	12	Darlington-County, South Carolina	South Carolina	—	Daughter
1940	Mary Washington	40	Sharkey-County, Mississippi	Mississippi	—	Wife
1940	Mary Washington	50	Fulton-County, Georgia	Georgia	Ldying House	Head
1910	Mary Washington		Shelby, Tennessee	Tennessee	Farm Laborer	Wife

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About Mary Washington US Census Records & Model Tree

We've indexed 9376 free, proprietary US Census records for Mary Washington across 1900–1950, covering 48 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, 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 9376 US Census records for Mary Washington, from 1900 to 1950, across 48 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 Washington'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 Washington 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 Washington records from the 1900 through 1950 US Federal Census, across 48 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.