How many Mary Hamilton census records do you have?

We have 16623 US Census records for Mary Hamilton, from 1900 to 1950, across 50 states and DC.

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

Yes. All Mary Hamilton 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 Hamilton?

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

How do I find Mary Hamilton 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 Hamilton?

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 Hamilton — US Census Records & Model Tree

We found 16623 free census records for Mary Hamilton across 6 census years (1900–1950), in 50 states and DC and 2122 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Hamilton Census Records by State & County

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Showing of 16623 records for Mary Hamilton US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary Hamilton		Baltimore, Maryland	Maryland	—	Daughter
1940	Mary Hamilton	21	Lauderdale-County, Alabama	Alabama	—	Daughter
1930	Mary Hamilton		New York, New York	New York	Laborer	Daughter
1930	Mary M. Hamilton		Bristol, Massachusetts	Massachusetts	Stenographer	Daughter
1930	Mary E Hamilton		Essex, New Jersey	New Jersey	Stenographer	Daughter
1940	Mary Lee Hamilton	25	Lincoln-County, Louisiana	Louisiana	—	Daughter
1930	Mary Hamilton		Columbiana, Ohio	Ohio	Stenographer	Daughter
1930	Mary V. Hamilton		Westmoreland, Pennsylvania	Scotland	Physician	Daughter
1940	Mary N. Hamilton	29	Frederick-County, Maryland	Maryland	Secretary	Daughter
1930	Mary Hamilton		Berkshire, Massachusetts	Massachusetts	Secretary	Daughter
1940	Mary Sue Hamilton	35	Potter-County, Texas	Oklahoma	Private Nurse	Daughter
1930	Mary Ann Hamilton		Passaic, New Jersey	England	—	Wife
1940	Mary Hamilton	41	Gaston-County, North Carolina	North Carolina	—	Wife
1910	Mary A. Hamilton		Christian, Kentucky	Tennessee	—	Wife
1920	Mary Hamilton		Alameda, California	Idaho	None	Wife
1940	Mary Hamilton	60	Lorain-County, Ohio	Ohio	—	Wife
1920	Mary Hamilton		Philadelphia, Pennsylvania	Pennsylvania	None	Wife
1910	Mary Hamilton		Leake, Mississippi	Mississippi	Laborer	Wife
1930	Mary Hamilton		Charleston, South Carolina	South Carolina	—	Wife
1920	Mary E Hamilton		Washington, Indiana	Indiana	—	Wife
1920	Mary Hamilton		Hampden, Massachusetts	Ireland	None	Wife
1920	Mary Hamilton		Philadelphia, Pennsylvania	Ireland	—	Head
1940	Mary Hamilton	60	Floyd-County, Kentucky	Kentucky	—	Wife
1920	Mary E Hamilton		Burlington, New Jersey	Pennsylvania	—	Head
1940	Mary Hamilton	46	Cook-County, Illinois	Illinois	—	Wife
1910	Mary E. Hamilton		Bristol, Massachusetts	Massachusetts	—	Head
1940	Mary Hamilton	71	Montgomery-County, Pennsylvania	Ireland	—	Head
1910	Mary Hamilton		Philadelphia, Pennsylvania	Ireland	Forelady	Head
1940	Mary L. Hamilton	80	Fulton-County, Georgia	Florida	—	Head
1910	Mary Hamilton		Berkeley, South Carolina	South Carolina	—	Daughter

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About Mary Hamilton US Census Records & Model Tree

We've indexed 16623 free, proprietary US Census records for Mary Hamilton across 1900–1950, covering 50 states and DC: 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, 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 16623 US Census records for Mary Hamilton, from 1900 to 1950, across 50 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 Hamilton'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 Hamilton 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 Hamilton records from the 1900 through 1950 US Federal Census, across 50 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.

Other Hamilton US Census Records

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