How many William Martin census records do you have?

We have 40603 US Census records for William Martin, from 1900 to 1950, across 50 states, DC, and 2 territories.

What's in a William Martin 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 Martin'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 Martin census records free?

Yes. All William Martin 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 Martin?

We have William Martin records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 2 territories. Use the year and state filters to narrow your results.

How do I find William Martin 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 Martin?

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 Martin — US Census Records & Model Tree

We found 40603 free census records for William Martin across 6 census years (1900–1950), in 50 states, DC, and 2 territories and 2621 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

William Martin Census Records by State & County

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Showing of 40603 records for William Martin US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	William R Martin	21	Bedford-County, Virginia	Virginia	Tap Maker	Son
1930	William J. Martin		Berkshire, Massachusetts	New Hampshire	Weaver	Head
1920	William Martin		Davidson, Tennessee	Tennessee	—	Son
1900	William H Martin	8	Anderson, South Carolina	South Carolina	At School	Son
1940	William H. Jr. Martin	24	Bedford-County, Virginia	Virginia	Laborer	Son
1920	William A Martin		Mecklenburg, North Carolina	North Carolina	—	Son
1940	William J. Martin	27	Middlesex-County, Massachusetts	Massachusetts	Library Assistant	Son
1940	William B. Martin	21	Spencer-County, Kentucky	Kentucky	File Clerk	Son
1940	William Martin	26	Essex-County, Massachusetts	Massachusetts	Trucker	Son
1940	William A. Martin	35	Gaston-County, North Carolina	North Carolina	Junner Room	Head
1940	William Martin	24	Essex-County, New Jersey	New Jersey	Clerical Worker	Son
1940	William Martin	29	Scott-County, Iowa	Iowa	Mason Contractor	Head
1930	William O. Martin		Washington, Indiana	Indiana	Teacher	Son
1940	William T Martin	41	Frederick-County, Maryland	Maryland	Manager	Head
1920	William S. Martin		Richmond, North Carolina	North Carolina	None	Son
1940	William H. Jr. Martin	21	Richmond-City-County, Virginia	Virginia	Truck Driver	Son
1920	William Martin		Douglas, Missouri	Missouri	—	Son
1910	William Martin		Davidson, Tennessee	Tennessee	—	Son
1940	William S Martin	21	Baltimore-City-County, Maryland	Maryland	Crane Knocker	Son
1940	William Jr Martin	23	Waukesha-County, Wisconsin	Wisconsin	52	Son
1940	William K. Martin	35	Wayne-County, Michigan	Scotland	Pattern Maker	Head
1940	William W Martin	24	Kern-County, California	California	Mechanic'S Helper	Son
1930	William J. Martin		Schuylkill, Pennsylvania	Pennsylvania	—	Son
1900	William Martin	45	Dakota, Minnesota	Vermont	Farm Laborer	Head
1910	William Martin		Warren, Tennessee	Tennessee	Farmer	Head
1920	William J. Martin		Allegheny, Pennsylvania	Ireland	Baker	Head
1940	William Martin	55	Hennepin-County, Minnesota	Minnesota	Treasurer	Head
1930	William C. Martin		Nassau, New York	Norway	Carpenter	Head
1940	William E. Martin	48	Marshall-County, Kansas	Kansas	Farmer	Head
1920	William Martin		Stokes, North Carolina	North Carolina	Farmer	Head

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About William Martin US Census Records & Model Tree

We've indexed 40603 free, proprietary US Census records for William Martin across 1900–1950, covering 50 states, DC, and 2 territories: 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, 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 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 40603 US Census records for William Martin, from 1900 to 1950, across 50 states, DC, and 2 territories.
: 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 Martin'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 Martin 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 Martin records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 2 territories. 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.