How many William Carr census records do you have?

We have 7361 US Census records for William Carr, from 1900 to 1950, across 48 states, DC, and 1 territory.

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

Yes. All William Carr 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 Carr?

We have William Carr records from the 1900 through 1950 US Federal Census, across 48 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find William Carr 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 Carr?

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 Carr — US Census Records & Model Tree

We found 7361 free census records for William Carr across 6 census years (1900–1950), in 48 states, DC, and 1 territory and 1399 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

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Showing of 7361 records for William Carr US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	William Carr	34	Dubuque-County, Iowa	Iowa	Farmer	Head
1920	William V. Carr		Overton, Tennessee	Tennessee	None	Son
1930	William Carr		Suffolk, Massachusetts	Massachusetts	Chauffeur	Son
1930	William Carr		Plymouth, Massachusetts	Massachusetts	—	Son
1940	William Carr	40	Attala-County, Mississippi	Mississippi	12	Head
1940	William Carr	42	St.-Louis-City-County, Missouri	Missouri	Chauffeur	Head
1940	William Ray Carr	36	Limestone-County, Texas	Texas	Laborer	Head
1940	William Carr	29	Posey-County, Indiana	Indiana	Laborer	Head
1940	William Carr	27	Philadelphia-County, Pennsylvania	PENNSYLVANIA	Printer	Head
1900	William G. Carr	2	Duplin, North Carolina	North Carolina	—	Son
1940	William H. Carr	26	Duplin-County, North Carolina	North Carolina	Farm Operator	Head
1930	William Carr		Prentiss, Mississippi	Mississippi	Farmer	Head
1930	William M. Carr		Merrimack, New Hampshire	New Hampshire	Proprietor	Head
1910	William Carr		Cambria, Pennsylvania	Ireland	Laborer	Head
1940	William H Carr	72	Grand-County, Colorado	Kansas	Rancher	Head
1940	William Carr	49	St.-Louis-City-County, Missouri	Mississippi	Mechanic	Head
1940	William S. Carr	62	Pike-County, Illinois	Illinois	Laborer	Head
1920	William Carr		Worcester, Massachusetts	England	—	Head
1920	William H Carr		Jefferson, Kentucky	Kentucky	—	Head
1930	William A. Carr		Baltimore, Maryland	Maryland	Butler	Head
1930	William Carr		Jefferson, Arkansas	Louisiana	Farming	Head
1940	William H. Carr	46	Anne-Arundel-County, Maryland	Maryland	Laborer	Head
1940	William F Carr	70	Pettis-County, Missouri	Missouri	Farmer	Head
1920	William P. Carr		Philadelphia, Pennsylvania	New Jersey	None	Head
1930	William W Carr		Stewart, Tennessee	Tennessee	Farmer	Head
1940	William H Carr	77	Baltimore-City-County, Maryland	Maryland	Teacher	Head
1940	William Carr	56	Hartford-County, Connecticut	Vermont	Truck Driver	Head
1940	William Carr	16	Chesterfield-County, Virginia	Virginia	—	Son
1940	William Carr	44	St.-Louis-County, Missouri	Kentucky	Carpenter	Head
1940	William G. Carr	17	Middlesex-County, Massachusetts	Massachusetts	—	Son

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About William Carr US Census Records & Model Tree

We've indexed 7361 free, proprietary US Census records for William Carr across 1900–1950, covering 48 states, DC, and 1 territory: Alabama, 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, 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 7361 US Census records for William Carr, from 1900 to 1950, across 48 states, DC, and 1 territory.
: 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 Carr'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 Carr 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 Carr records from the 1900 through 1950 US Federal Census, across 48 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.