How many Mary Mason census records do you have?

We have 16047 US Census records for Mary Mason, from 1900 to 1950, across 50 states, DC, and 3 territories.

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

Yes. All Mary Mason 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 Mason?

We have Mary Mason records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 3 territories. Use the year and state filters to narrow your results.

How do I find Mary Mason 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 Mason?

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 Mason — US Census Records & Model Tree

We found 16047 free census records for Mary Mason across 6 census years (1900–1950), in 50 states, DC, and 3 territories and 2080 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Mason Census Records by State & County

Records per state:

Census Record Search

First Name

Middle Name

Last Name (Required)

Census Year

State

Birth Year

Year Range

Birthplace

Age From

Age To

Exact match: Name Location Year

Alternate First Names (comma-separated)

Alternate Last Names (comma-separated)

County

Sex

Marital Status

Race

Relationship to Head

Occupation

Census Page ID

Family Members (in same household)

Search Records

Showing of 16047 records for Mary Mason US Census, ranked by Model Tree richness

No records match your filters.

Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary E Mason		Trego, Kansas	Kansas	Stenographer	Daughter
1920	Mary E. Mason		Dallas, Arkansas	Arkansas	—	Daughter
1940	Mary Mason	30	Baltimore-City-County, Maryland	Virginia	—	Daughter
1940	Mary Mason	40	Hampden-County, Massachusetts	Maine	Telephone Operator	Daughter
1910	Mary E Mason		Baltimore, Maryland	Maryland	—	Wife
1940	Mary L. Mason	59	Worcester-County, Massachusetts	Connecticut	—	Head
1940	Mary C. Mason	55	Baltimore-City-County, Maryland	Maryland	—	Wife
1910	Mary L. Mason		Accomack, Virginia	Maryland	Laundress	Wife
1920	Mary Mason		Gaston, North Carolina	South Carolina	Farm Laborer	Wife
1940	Mary Mason	48	Norfolk-County, Massachusetts	Rhode Island	Hat Maker	Wife
1920	Mary Mason		Mercer, New Jersey	New Jersey	—	Head
1920	Mary Ann Mason		Warren, Illinois	Iowa	None	Wife
1940	Mary Mason	53	Morgan-County, Illinois	Illinois	Housekeeping	Wife
1940	Mary L Mason	39	District-Of-Columbia-County, District of Columbia	Maryland	Indexer	Wife
1920	Mary Mason		Philadelphia, Pennsylvania	England	—	Wife
1920	Mary Mason		Allegheny, Pennsylvania	Germany	Housework	Head
1920	Mary Mason		Clarke, Alabama	Alabama	Farm Laborer	Son
1910	Mary J. Mason		None, None	Georgia	—	Wife
1930	Mary Mason		Surry, Virginia	Virginia	Laborer	Daughter
1940	Mary Mason	38	Sussex-County, Virginia	Virginia	—	Wife
1940	Mary J. Mason	12	Caddo-County, Louisiana	Louisiana	—	Daughter
1910	Mary A Mason		Whitman, Washington	Washington	—	Daughter
1930	Mary K. Mason		Jefferson, Texas	Texas	—	Daughter
1920	Mary S. Mason		Franklin, Ohio	Ohio	None	Daughter
1940	Mary Grace Mason	15	Hamilton-County, Ohio	Ohio	—	Daughter
1940	Mary Mason	14	Hyde-County, South Dakota	South Dakota	—	Daughter
1910	Mary Mason		Southampton, Virginia	Virginia	Laborer	Daughter
1930	Mary E. Mason		Alameda, California	California	—	Daughter
1910	Mary Mason		Southampton, Virginia	Virginia	—	Wife
1940	Mary Lee Mason	33	Union-County, Georgia	Georgia	—	Wife

Load More Mary Mason Census Records

About Mary Mason US Census Records & Model Tree

We've indexed 16047 free, proprietary US Census records for Mary Mason across 1900–1950, covering 50 states, DC, and 3 territories: 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, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, U.S. Virgin Islands, 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 16047 US Census records for Mary Mason, from 1900 to 1950, across 50 states, DC, and 3 territories.
: 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 Mason'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 Mason 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 Mason records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 3 territories. 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.