How many Mary Blake census records do you have?

We have 5620 US Census records for Mary Blake, from 1900 to 1950, across 49 states and DC.

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

Yes. All Mary Blake 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 Blake?

We have Mary Blake 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 Blake 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 Blake?

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 Blake — US Census Records & Model Tree

We found 5620 free census records for Mary Blake across 6 census years (1900–1950), in 49 states and DC and 1084 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Blake Census Records by State & County

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Showing of 5620 records for Mary Blake US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Blake		Dane, Wisconsin	Wisconsin	—	Daughter
1920	Mary A. Blake		Essex, Massachusetts	Massachusetts	Meter Tester	Daughter
1940	Mary J. Blake	39	Allegany-County, Maryland	Maryland	—	Daughter
1940	Mary E. Blake	22	Pender-County, North Carolina	North Carolina	Secretary	Daughter
1920	Mary A. Blake		Storey, Nevada	Connecticut	Housekeeper	Daughter
1920	Mary Blake		New York, New York	New York	Operator	Daughter
1930	Mary E. Blake		Strafford, New Hampshire	New Hampshire	Proprietor	Wife
1910	Mary Blake		New York, New York	Ireland	—	Wife
1920	Mary Blake		Rensselaer, New York	New York	—	Wife
1940	Mary Blake	60	Union-County, New Jersey	Vermont	—	Wife
1940	Mary Blake	63	Calhoun-County, West Virginia	West Virginia	—	Wife
1920	Mary Blake		Passaic, New Jersey	Ireland	None	Head
1940	Mary Blake	70	Kanawha-County, West Virginia	West Virginia	—	Head
1920	Mary J Blake		Inyo, California	Missouri	—	Wife
1940	Mary S. Blake	82	Middlesex-County, Virginia	Virginia	—	Head
1940	Mary Blake	24	Baltimore-City-County, Maryland	Maryland	—	Daughter
1940	Mary E. Blake	15	Harrison-County, West Virginia	West Virginia	—	Daughter
1930	Mary E. Blake		Greenbrier, West Virginia	West Virginia	—	Daughter
1940	Mary E. Blake	53	Philadelphia-County, Pennsylvania	England	—	Wife
1940	Mary Blake	14	Kings-County, New York	New York	—	Daughter
1910	Mary Blake		Passaic, New Jersey	New Jersey	None	Daughter
1930	Mary E. Blake		York, South Carolina	South Carolina	Laundress	Daughter
1940	Mary Blake	16	Kings-County, New York	New York	—	Daughter
1930	Mary Blake		Okmulgee, Oklahoma	Oklahoma	—	Daughter
1940	Mary E. Blake	11	Bolivar-County, Mississippi	Mississippi	—	Daughter
1940	Mary Jean Blake	10	Orleans-County, Vermont	Vermont	—	Daughter
1910	Mary Blake		Providence, Rhode Island	Rhode Island	—	Daughter
1920	Mary Blake		York, South Carolina	South Carolina	Cook	Daughter
1920	Mary Blake		Chester, South Carolina	South Carolina	—	Daughter
1940	Mary Blake	52	Essex-County, New Jersey	North Ireland	—	Head

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About Mary Blake US Census Records & Model Tree

We've indexed 5620 free, proprietary US Census records for Mary Blake across 1900–1950, covering 49 states and DC: Alabama, 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 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 5620 US Census records for Mary Blake, 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 Blake'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 Blake 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 Blake 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.