How many Mary Merrill census records do you have?

We have 3440 US Census records for Mary Merrill, from 1900 to 1950, across 50 states and DC.

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

Yes. All Mary Merrill 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 Merrill?

We have Mary Merrill 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 Merrill 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 Merrill?

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 Merrill — US Census Records & Model Tree

We found 3440 free census records for Mary Merrill across 6 census years (1900–1950), in 50 states and DC and 917 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Merrill Census Records by State & County

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Showing of 3440 records for Mary Merrill US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	Mary E. Merrill		Grafton, New Hampshire	New Hampshire	—	Daughter
1940	Mary M. Merrill	35	Middlesex-County, Massachusetts	Massachusetts	Teacher	Daughter
1910	Mary A Merrill		Merrimack, New Hampshire	New Hampshire	—	Wife
1920	Mary E. Merrill		Belknap, New Hampshire	Pennsylvania	—	Head
1910	Mary E. Merrill		Suffolk, Massachusetts	Maine	—	Wife
1910	Mary M Merrill		Grafton, New Hampshire	Vermont	Farmer	Head
1920	Mary J Merrill		Montgomery, Mississippi	Connecticut	—	Head
1910	Mary O Merrill		Grafton, New Hampshire	Vermont	Landlady	Wife
1940	Mary A. Merrill	65	Monroe-County, Indiana	Pennsylvania	—	Wife
1930	Mary Merrill		Union, New Jersey	New York	—	Wife
1940	Mary E. Merrill	42	Norfolk-County, Massachusetts	Rhode Island	—	Wife
1920	Mary Sam Merrill		Williamson, Tennessee	Tennessee	Cook	Daughter
1930	Mary L. Merrill		Buncombe, North Carolina	North Carolina	—	Daughter
1930	Mary A Merrill		Kings, New York	New York	Teacher	Daughter
1940	Mary Ella Merrill	12	Jefferson-County, Arkansas	Arkansas	—	Daughter
1900	Mary T Merrill	48	Colusa, California	Tennessee	—	Wife
1910	Mary S. Merrill		Rockingham, New Hampshire	New Hampshire	—	Wife
1940	Mary Merrill	14	Los-Angeles-County, California	California	—	Daughter
1910	Mary Merrill		Van Buren, Michigan	Michigan	None	Wife
1940	Mary Merrill	41	Ventura-County, California	Mexico	—	Wife
1930	Mary Merrill		Middlesex, Massachusetts	Canada	—	Wife
1910	Mary B. Merrill		Androscoggin, Maine	Maine	—	Wife
1940	Mary Merrill	14	Essex-County, Massachusetts	Massachusetts	—	Daughter
1920	Mary Ruth Merrill		Hughes, Oklahoma	Oklahoma	—	Daughter
1920	Mary A. Merrill		Essex, Massachusetts	Massachusetts	—	Daughter
1920	Mary Merrill		Cowley, Kansas	Kansas	None	Daughter
1900	Mary Merrill	68	Essex, Massachusetts	Massachusetts	—	Head
1910	Mary Merrill		Shelby, Alabama	Alabama	—	Wife
1930	Mary E Merrill		York, Maine	Maine	—	Wife
1940	Mary S. Merrill	64	Hampshire-County, Massachusetts	Irish Free State	—	Wife

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About Mary Merrill US Census Records & Model Tree

We've indexed 3440 free, proprietary US Census records for Mary Merrill 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 3440 US Census records for Mary Merrill, 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 Merrill'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 Merrill 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 Merrill 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.