How many Mary Arnold census records do you have?

We have 11245 US Census records for Mary Arnold, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All Mary Arnold 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 Arnold?

We have Mary Arnold 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 Arnold 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 Arnold?

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 Arnold — US Census Records & Model Tree

We found 11245 free census records for Mary Arnold across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1817 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Arnold Census Records by State & County

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Showing of 11245 records for Mary Arnold US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	Mary J Arnold		Lake, California	Kentucky	—	Head
1940	Mary Arnold	21	Rutherford-County, Tennessee	Tennessee	—	Daughter
1920	Mary Arnold		Wake, North Carolina	North Carolina	—	Daughter
1940	Mary M. Arnold	27	King-County, Washington	Washington	Operator	Daughter
1940	Mary Arnold	23	Wabash-County, Illinois	Illinois	—	Daughter
1940	Mary Sue Arnold	22	Ouachita-County, Arkansas	Arkansas	—	Wife
1940	Mary E. Arnold	78	Pike-County, Indiana	Indiana	—	Head
1930	Mary Arnold		Marion, Indiana	Indiana	Office Work	Daughter
1930	Mary A. Arnold		Worcester, Massachusetts	Massachusetts	—	Head
1940	Mary Arnold	82	Fremont-County, Colorado	Belgium	U	Head
1920	Mary E. Arnold		Cumberland, Pennsylvania	Pennsylvania	Boarding House	Head
1940	Mary F. Arnold	59	Marshall-County, West Virginia	West Virginia	—	Wife
1940	Mary Arnold	28	Allegheny-County, Pennsylvania	Pennsylvania	—	Wife
1940	Mary Arnold	58	Columbia-County, Pennsylvania	Pennsylvania	—	Wife
1900	Mary Arnold	25	Providence, Rhode Island	Rhode Island	—	Wife
1940	Mary Arnold	65	Sullivan-County, Indiana	Illinois	—	Wife
1940	Mary Arnold	75	Spartanburg-County, South Carolina	South Carolina	—	Head
1940	Mary E. Arnold	76	Wood-County, Ohio	Ohio	—	Wife
1940	Mary W. Arnold	52	Providence-County, Rhode Island	Rhode Island	—	Wife
1940	Mary Arnold	60	Allegheny-County, Pennsylvania	Pennsylvania	—	Wife
1940	Mary Lou Arnold	54	White-County, Tennessee	Tennessee	—	Wife
1940	Mary Arnold	73	Northampton-County, Pennsylvania	Pennsylvania	—	Wife
1930	Mary Arnold		Cook, Illinois	Scotland	None	Wife
1940	Mary Ann Arnold	75	Cook-County, Illinois	England	—	Wife
1920	Mary Arnold		Davidson, Tennessee	Tennessee	—	Daughter
1940	Mary L. Arnold	18	Washington-County, Ohio	Ohio	—	Daughter
1910	Mary Arnold		Ouachita, Arkansas	Arkansas	—	Daughter
1920	Mary Arnold		Somerset, Pennsylvania	Pennsylvania	—	Daughter
1940	Mary E Arnold	16	Lebanon-County, Pennsylvania	Pennsylvania	—	Daughter
1940	Mary Arnold	13	Prentiss-County, Mississippi	Mississippi	—	Daughter

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About Mary Arnold US Census Records & Model Tree

We've indexed 11245 free, proprietary US Census records for Mary Arnold 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, Puerto Rico, 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 11245 US Census records for Mary Arnold, 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 Arnold'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 Arnold 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 Arnold 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.