How many Margaret Brennan census records do you have?

We have 4328 US Census records for Margaret Brennan, from 1900 to 1950, across 48 states and DC.

What's in a Margaret Brennan census record?

You'll see Margaret'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 Margaret Brennan'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 Margaret Brennan census records free?

Yes. All Margaret Brennan 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 Margaret Brennan?

We have Margaret Brennan 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 Margaret Brennan 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 Margaret Brennan?

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.

Margaret Brennan — US Census Records & Model Tree

We found 4328 free census records for Margaret Brennan across 6 census years (1900–1950), in 48 states and DC and 393 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Margaret Brennan Census Records by State & County

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Showing of 4328 records for Margaret Brennan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Margaret Brennan	33	Essex-County, New Jersey	New Jersey	—	Wife
1940	Margaret Brennan	33	Essex-County, New Jersey	New Jersey	Stenographer	Daughter
1940	Margaret Brennan	30	Union-County, New Jersey	New Jersey	Key-Punch Operator	Daughter
1930	Margaret Brennan		Schuylkill, Pennsylvania	Pennsylvania	None	Daughter
1940	Margaret Brennan	42	Union-County, New Jersey	New Jersey	Saleslady	Daughter
1930	Margaret Brennan		Strafford, New Hampshire	New Hampshire	Stenographer	Daughter
1920	Margaret J Brennan		New Castle, Delaware	Delaware	—	Daughter
1940	Margaret Brennan	61	Cook-County, Illinois	Illinois	—	Head
1940	Margaret Brennan	32	Richmond-County, New York	New York	File Clerk	Daughter
1940	Margaret Brennan	24	Bronx-County, New York	New York	Clerical	Daughter
1940	Margaret Brennan	26	Bronx-County, New York	New York	Bookkeeper	Daughter
1940	Margaret A. Brennan	29	Schuylkill-County, Pennsylvania	Pennsylvania	—	Wife
1930	Margaret Brennan		Middlesex, Massachusetts	Massachusetts	Inspector	Daughter
1940	Margaret Brennan	28	San-Francisco-County, California	California	Teacher	Daughter
1930	Margaret Brennan		Essex, Massachusetts	Massachusetts	Stenographer	Daughter
1940	Margaret F. Brennan	83	Ramsey-County, Minnesota	Illinois	—	Head
1940	Margaret Brennan	46	Schuylkill-County, Pennsylvania	Pennsylvania	—	Wife
1920	Margaret Brennan		New Castle, Delaware	Ireland	—	Wife
1930	Margaret Brennan		Kings, New York	Ireland	—	Wife
1940	Margaret A. Brennan	57	Warren-County, Pennsylvania	Pennsylvania	—	Head
1920	Margaret Brennan		Hartford, Connecticut	Ireland	—	Head
1920	Margaret Brennan		Wayne, Michigan	Michigan	—	Head
1930	Margaret M Brennan		Kings, New York	Ireland	—	Wife
1920	Margaret Brennan		Onondaga, New York	Ireland	None	Head
1940	Margaret Brennan	67	New-York-County, New York	Ireland	—	Head
1940	Margaret Brennan	70	Essex-County, Massachusetts	England	—	Head
1920	Margaret Brennan		Dauphin, Pennsylvania	Pennsylvania	—	Daughter
1940	Margaret Brennan	19	Allegheny-County, Pennsylvania	Pennsylvania	New Worker	Daughter
1920	Margaret Brennan		Kings, New York	New York	Joiner	Daughter
1930	Margaret Brennan		Schuylkill, Pennsylvania	Pennsylvania	—	Daughter

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About Margaret Brennan US Census Records & Model Tree

We've indexed 4328 free, proprietary US Census records for Margaret Brennan across 1900–1950, covering 48 states and DC: Alabama, Arizona, 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 Margaret 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 4328 US Census records for Margaret Brennan, from 1900 to 1950, across 48 states and DC.
: You'll see Margaret'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 Margaret Brennan'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 Margaret Brennan 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 Margaret Brennan 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.

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