How many William Harris census records do you have?

We have 36686 US Census records for William Harris, from 1900 to 1950, across 50 states, DC, and 3 territories.

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

Yes. All William Harris 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 Harris?

We have William Harris records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 3 territories. Use the year and state filters to narrow your results.

How do I find William Harris 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 Harris?

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 Harris — US Census Records & Model Tree

We found 36686 free census records for William Harris across 6 census years (1900–1950), in 50 states, DC, and 3 territories and 2570 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

William Harris Census Records by State & County

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Showing of 36686 records for William Harris US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	William Harris	47	Kandiyohi-County, Minnesota	Minnesota	Foreman	Head
1940	William M. Harris	44	Uinta-County, Wyoming	Wyoming	Welfare Director	Head
1920	William Harris		Harris, Texas	Texas	Porter	Head
1940	William Harris	37	Lyon-County, Kansas	Kansas	Attorney	Head
1920	William Harris		Suffolk, Massachusetts	Massachusetts	Cutter	Son
1930	William Harris		Crisp, Georgia	Georgia	Farmer	Son
1920	William Harris		Richland, South Carolina	South Carolina	—	Son
1920	William Harris		Greenville, South Carolina	South Carolina	None	Son
1930	William Harris		Granville, North Carolina	North Carolina	Laborer	Son
1920	William N Harris		Wilcox, Alabama	Alabama	Farmer	Head
1940	William N Harris	20	Harrison-County, Texas	Texas	Laborer	Son
1920	William A Harris		Orange, New York	New York	Chauffeur	Son
1920	William Harris		Dallas, Texas	Texas	Contractor	Son
1940	William Harris	28	Hudson-County, New Jersey	New Jersey	Cribman	Son
1900	William Harris	2	Cass, Texas	Texas	—	Son
1940	William Harris	29	Warrick-County, Indiana	Indiana	Laborer	Head
1940	William J. Harris	22	Owen-County, Indiana	Indiana	Laborer	Son
1920	William Harris		None, Texas	Texas	—	Son
1910	William Harris		Orleans, Louisiana	Louisiana	—	Son
1940	William L. Jr. Harris	23	Huntingdon-County, Pennsylvania	Pennsylvania	Pipe Fitter	Son
1940	William Harris	26	Davidson-County, Tennessee	Tennessee	Proprietor	Son
1930	William S. Harris		Franklin, Ohio	Ohio	—	Son
1930	William Harris		Bronx, New York	Russia	Plasterer	Head
1930	William Harris		None, None	Tennessee	Coach Clean	Head
1900	William Harris	1	Wichita, Texas	Texas	—	Son
1920	William Harris		Baltimore, Maryland	Maryland	Laborer	Son
1920	William Harris		Leon, Florida	Florida	Laborer	Head
1920	William S Harris		Broome, New York	New York	None	Son
1920	William A Harris		Shelby, Tennessee	Tennessee	Farmer	Head
1940	William H Harris	64	Richmond-City-County, Virginia	Virginia	Salesman	Head

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About William Harris US Census Records & Model Tree

We've indexed 36686 free, proprietary US Census records for William Harris across 1900–1950, covering 50 states, DC, and 3 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, U.S. Virgin Islands, 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 36686 US Census records for William Harris, from 1900 to 1950, across 50 states, DC, and 3 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 Harris'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 Harris 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 Harris records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 3 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.