How many Mary Hammond census records do you have?

We have 7010 US Census records for Mary Hammond, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Hammond 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 Hammond?

We have Mary Hammond 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 Hammond 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 Hammond?

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 Hammond — US Census Records & Model Tree

We found 7010 free census records for Mary Hammond across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1464 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Hammond Census Records by State & County

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Showing of 7010 records for Mary Hammond US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary Hammond	38	Fulton-County, Illinois	Illinois	—	Daughter
1930	Mary L Hammond		Edgefield, South Carolina	South Carolina	Laborer	Daughter
1940	Mary H. Hammond	23	Jones-County, North Carolina	North Carolina	Teacher	Daughter
1940	Mary Hammond	29	Lee-County, Illinois	Illinois	—	Daughter
1940	Mary Hammond	30	Spartanburg-County, South Carolina	South Carolina	—	Daughter
1940	Mary Ann Hammond	39	Lancaster-County, Pennsylvania	Pennsylvania	Beautician	Daughter
1940	Mary R. Hammond	37	Allegheny-County, Pennsylvania	West Virginia	50	Daughter
1920	Mary M. Hammond		Richland, South Carolina	South Carolina	—	Daughter
1940	Mary Hammond	41	Baltimore-City-County, Maryland	Maryland	—	Daughter
1940	Mary E. Hammond	71	Kent-County, Delaware	Delaware	—	Wife
1920	Mary Hammond		Middlesex, Massachusetts	Ireland	—	Wife
1940	Mary S Hammond	54	Lawrence-County, Tennessee	Alabama	—	Wife
1940	Mary Hammond	73	Kings-County, New York	New York	—	Head
1940	Mary E. Hammond	64	Lancaster-County, South Carolina	South Carolina	—	Wife
1940	Mary Hammond	63	Richland-County, South Carolina	South Carolina	—	Wife
1920	Mary Hammond		Scotland, Missouri	Missouri	—	Wife
1920	Mary S. Hammond		Worcester, Massachusetts	Vermont	—	Wife
1930	Mary Hammond		Shelby, Kentucky	Kentucky	—	Wife
1930	Mary Hammond		Kent, Delaware	Delaware	—	Daughter
1910	Mary A Hammond		Franklin, Pennsylvania	Pennsylvania	—	Wife
1930	Mary Hammond		Essex, New Jersey	New Jersey	—	Daughter
1920	Mary Hammond		Madison, Alabama	Alabama	Farm Laborer	Daughter
1940	Mary Francis Hammond	15	Putnam-County, Indiana	Indiana	—	Daughter
1930	Mary Hammond		Cambria, Pennsylvania	Pennsylvania	—	Wife
1940	Mary L. Hammond	11	Leon-County, Texas	Texas	—	Daughter
1930	Mary E. Hammond		Franklin, Pennsylvania	Pennsylvania	None	Daughter
1940	Mary R. Hammond	57	Blair-County, Pennsylvania	Pennsylvania	—	Wife
1910	Mary Hammond		Jefferson, Kentucky	Kentucky	—	Wife
1930	Mary Hammond		Jefferson, Louisiana	Louisiana	Picker Cotton	Daughter
1940	Mary Jo Hammond	12	Trimble-County, Kentucky	Kentucky	—	Daughter

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About Mary Hammond US Census Records & Model Tree

We've indexed 7010 free, proprietary US Census records for Mary Hammond across 1900–1950, covering 50 states, DC, and 1 territory: 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, 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 7010 US Census records for Mary Hammond, 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 Hammond'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 Hammond 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 Hammond 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.