How many Mary Jacobs census records do you have?

We have 8022 US Census records for Mary Jacobs, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Jacobs 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 Jacobs?

We have Mary Jacobs 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 Jacobs 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 Jacobs?

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 Jacobs — US Census Records & Model Tree

We found 8022 free census records for Mary Jacobs across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1416 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Jacobs Census Records by State & County

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Showing of 8022 records for Mary Jacobs US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Jacobs	22	Northampton-County, North Carolina	North Carolina	—	Daughter
1920	Mary Jacobs		Middlesex, New Jersey	Hungary	None	Daughter
1930	Mary Jacobs		Bayfield, Wisconsin	Wisconsin	Cashier	Daughter
1940	Mary Lela Jacobs	32	Robeson-County, North Carolina	North Carolina	Laborer	Head
1940	Mary Jacobs	32	Kings-County, New York	New York	—	Wife
1930	Mary Jacobs		Ellis, Kansas	Kansas	—	Daughter
1930	Mary L. Jacobs		Sheridan, Nebraska	Nebraska	—	Wife
1920	Mary E. Jacobs		Strafford, New Hampshire	Maine	—	Head
1940	Mary Jacobs	53	Montgomery-County, Ohio	Hungary	—	Wife
1920	Mary M. Jacobs		Phillips, Kansas	Kentucky	—	Wife
1940	Mary Jacobs	61	Lucas-County, Ohio	Hungary	—	Wife
1900	Mary W. Jacobs	54	Cuyahoga, Ohio	Germany	House-Keeper	Head
1930	Mary R. Jacobs		Marion, Indiana	Indiana	—	Wife
1940	Mary O Jacobs	46	San-Bernardino-County, California	Kansas	—	Wife
1940	Mary E. Jacobs	60	Peoria-County, Illinois	Illinois	—	Wife
1940	Mary Jacobs	63	Wayne-County, North Carolina	North Carolina	—	Head
1930	Mary Jacobs		Logan, Illinois	Austria	None	Head
1930	Mary Jacobs		Knott, Kentucky	Kentucky	—	Daughter
1940	Mary Jacobs	13	Cambria-County, Pennsylvania	Pennsylvania	—	Daughter
1930	Mary E Jacobs		Appanoose, Iowa	Iowa	—	Wife
1930	Mary L. Jacobs		Mason, West Virginia	West Virginia	—	Daughter
1940	Mary Jacobs	12	Douglas-County, Georgia	Georgia	—	Daughter
1910	Mary E. Jacobs		Whitman, Washington	Washington	—	Daughter
1920	Mary A. Jacobs		Perry, Pennsylvania	Pennsylvania	—	Daughter
1910	Mary Jacobs		Marion, Florida	Florida	—	Wife
1940	Mary Jacobs	13	Franklin-County, Ohio	Ohio	—	Daughter
1910	Mary Jacobs		Carver, Minnesota	Minnesota	—	Daughter
1940	Mary Jacobs	56	Philadelphia-County, Pennsylvania	Pennsylvania	—	Wife
1940	Mary Jacobs	16	Prince-William-County, Virginia	Virginia	—	Daughter
1930	Mary Jacobs		Luzerne, Pennsylvania	Pennsylvania	—	Wife

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About Mary Jacobs US Census Records & Model Tree

We've indexed 8022 free, proprietary US Census records for Mary Jacobs across 1900–1950, covering 50 states, DC, and 1 territory: 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 Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, 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 8022 US Census records for Mary Jacobs, 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 Jacobs'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 Jacobs 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 Jacobs 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.