How many William Larkin census records do you have?

We have 3522 US Census records for William Larkin, from 1900 to 1950, across 49 states and DC.

What's in a William Larkin census record?

You'll see William'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 William Larkin'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 William Larkin census records free?

Yes. All William Larkin 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 William Larkin?

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

How do I find William Larkin 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 William Larkin?

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.

William Larkin — US Census Records & Model Tree

We found 3522 free census records for William Larkin across 6 census years (1900–1950), in 49 states and DC and 725 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

William Larkin Census Records by State & County

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Showing of 3522 records for William Larkin US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	William Larkin		New York, New York	New York	Salesman	Son
1920	William Larkin		Richmond, New York	New York	Mason	Son
1940	William L. Larkin	27	Chester-County, Pennsylvania	Pennsylvania	Laborer	Son
1940	William Larkin	30	Mclean-County, Illinois	Illinois	Farmer	Son
1930	William Larkin		Queens, New York	New York	—	Son
1920	William Larkin		New York, New York	Ireland	—	Head
1940	William J. Larkin	67	Essex-County, New Jersey	New York	Electrician	Head
1930	William Larkin		Baltimore, Maryland	Maryland	—	Son
1940	William Larkin	41	St.-Louis-City-County, Missouri	Georgia	Shoe Repairer	Head
1910	William Larkin		Allegheny, Pennsylvania	Pennsylvania	—	Son
1910	William Larkin		Fayette, Kentucky	Kentucky	Farm Laborer	Son
1930	William Larkin		Allegheny, Pennsylvania	Pennsylvania	Proprietor	Son
1940	William Jr. Larkin	16	Westchester-County, New York	Connecticut	—	Son
1940	William Larkin	15	New-York-County, New York	New York	—	Son
1940	William Larkin	18	Watonwan-County, Minnesota	Minnesota	Farmer	Son
1930	William Larkin		San Bernardino, California	Arkansas	None	Son
1940	William Larkin	19	Cook-County, Illinois	Minnesota	Reforestation	Son
1920	William Larkin		St Louis, Missouri	Missouri	Carpenter	Head
1930	William Larkin		Mercer, New Jersey	Ireland	—	Head
1910	William Larkin		New York, New York	New York	None	Son
1930	William H Larkin		Madison, New York	New York	None	Son
1930	William Larkin		San Francisco, California	California	Sales Manager	Son
1920	William Larkin		Worcester, Massachusetts	Massachusetts	Inspector	Son
1940	William Larkin	26	Delaware-County, Pennsylvania	Pennsylvania	Clerk	Son
1940	William E Larkin	23	Clinton-County, Iowa	Illinois	Bartender	Son
1930	William Larkin		Davidson, Tennessee	Tennessee	Brakeman	Head
1910	William M. Larkin		Neosho, Kansas	Kansas	—	Son
1930	William H Larkin		Madison, New York	New York	Farmer	Head
1930	William Larkin		Williamson, Tennessee	Tennessee	Farm Laborer	Son
1910	William Larkin		Washington, Rhode Island	Rhode Island	—	Son

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About William Larkin US Census Records & Model Tree

We've indexed 3522 free, proprietary US Census records for William Larkin across 1900–1950, covering 49 states and DC: Alabama, 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 William 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 3522 US Census records for William Larkin, from 1900 to 1950, across 49 states and DC.
: You'll see William'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 William Larkin'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 William Larkin 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 William Larkin records from the 1900 through 1950 US Federal Census, across 49 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.

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