How many Harry Mason census records do you have?

We have 3173 US Census records for Harry Mason, from 1900 to 1950, across 49 states, DC, and 1 territory.

What's in a Harry Mason census record?

You'll see Harry'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 Harry Mason'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 Harry Mason census records free?

Yes. All Harry Mason 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 Harry Mason?

We have Harry Mason records from the 1900 through 1950 US Federal Census, across 49 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find Harry Mason 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 Harry Mason?

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.

Harry Mason — US Census Records & Model Tree

We found 3173 free census records for Harry Mason across 6 census years (1900–1950), in 49 states, DC, and 1 territory and 893 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Harry Mason Census Records by State & County

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Showing of 3173 records for Harry Mason US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Harry Mason	30	Fulton-County, Illinois	Illinois	Farm Work	Head
1940	Harry Mason	58	Carroll-County, Indiana	Indiana	Farmer	Head
1940	Harry H Mason	49	Clark-County, Ohio	Ohio	Truck Driver	Head
1930	Harry M Mason		Trego, Kansas	Kansas	Machinist	Son
1940	Harry C. Mason	39	Owen-County, Kentucky	Kentucky	Laborer	Head
1940	Harry Mason	32	Will-County, Illinois	Illinois	Yard Clerk	Son
1940	Harry Mason	26	Lake-County, Illinois	Illinois	Asbestos	Son
1940	Harry Mason	20	Marion-County, Oregon	Oregon	—	Son
1920	Harry Mason		Franklin, Ohio	Ohio	Electrician	Head
1940	Harry G. Mason	43	Hudson-County, New Jersey	New Jersey	Patrolman	Head
1940	Harry E. Mason	42	Monroe-County, New York	New York	Electrical Worker	Head
1940	Harry Mason	38	Madison-County, Illinois	Illinois	Laborer	Head
1940	Harry L Mason	27	Roanoke-City-County, Virginia	Virginia	Clerk	Head
1940	Harry Mason	32	Mccracken-County, Kentucky	Kentucky	Laborer	Son
1930	Harry Scott Mason		Berkeley, West Virginia	West Virginia	Painter	Son
1930	Harry Mason		Cook, Illinois	Russia	Carpenter	Head
1940	Harry Mason	56	Antrim-County, Michigan	Michigan	—	Head
1930	Harry A. Mason		Hamilton, Iowa	Illinois	Farmer	Head
1940	Harry Mason	56	Lucas-County, Ohio	Michigan	Proprietor	Head
1940	Harry Mason	47	Bronx-County, New York	Russia	—	Head
1940	Harry Mason	51	Allegheny-County, Pennsylvania	Pennsylvania	Laborer	Head
1930	Harry R Mason		Sedgwick, Kansas	Missouri	Asst Manager	Head
1930	Harry D Mason		Denver, Colorado	Colorado	Mgr Director	Head
1940	Harry Mason	36	Kings-County, New York	New York	Cutter	Head
1930	Harry A. Mason		Worcester, Massachusetts	Massachusetts	Superintendent	Head
1940	Harry Mason	53	Lincoln-County, Nebraska	Missouri	Painter	Head
1930	Harry L. Mason		Los Angeles, California	California	Engineer	Head
1940	Harry R Mason	13	Fayette-County, West Virginia	West Virginia	—	Son
1940	Harry Mason	44	Chester-County, Pennsylvania	Pennsylvania	Melter	Head
1930	Harry Mason		Philadelphia, Pennsylvania	Virginia	—	Son

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About Harry Mason US Census Records & Model Tree

We've indexed 3173 free, proprietary US Census records for Harry Mason across 1900–1950, covering 49 states, DC, and 1 territory: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, 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 Harry 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 3173 US Census records for Harry Mason, from 1900 to 1950, across 49 states, DC, and 1 territory.
: You'll see Harry'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 Harry Mason'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 Harry Mason 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 Harry Mason records from the 1900 through 1950 US Federal Census, across 49 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.