How many William Arnold census records do you have?

We have 10017 US Census records for William Arnold, from 1900 to 1950, across 50 states and DC.

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

Yes. All William Arnold 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 Arnold?

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

How do I find William Arnold 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 Arnold?

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 Arnold — US Census Records & Model Tree

We found 10017 free census records for William Arnold across 6 census years (1900–1950), in 50 states and DC and 1692 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 10017 records for William Arnold US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	William C Arnold		Coweta, Georgia	Georgia	None	Son
1920	William Jr Arnold		Fulton, Georgia	Georgia	—	Son
1940	William H. Arnold	41	Cook-County, Illinois	Illinois	Agent	Head
1930	William Arnold		Nevada, Arkansas	Arkansas	—	Son
1940	William Jr Arnold	25	Morgan-County, Missouri	Missouri	Watchman	Son
1940	William Arnold	32	Trumbull-County, Ohio	Ohio	Attendant	Head
1940	William E. Jr. Arnold	26	Harrison-County, Texas	Texas	Clerical	Son
1930	William Arnold		Greene, Illinois	Illinois	Chauffeur	Son
1940	William Arnold	22	Cass-County, North Dakota	North Dakota	—	Son
1940	William Arnold	21	Kent-County, Rhode Island	Rhode Island	New Worker	Son
1940	William B. Arnold	28	Crawford-County, Illinois	Illinois	Lawyer	Son
1940	William Arnold	26	Queens-County, New York	New York	Salesman	Son
1940	William M Arnold	40	Lee-County, North Carolina	North Carolina	Mech & Electrician	Head
1920	William G. Arnold		Gwinnett, Georgia	Georgia	Farming	Head
1930	William Arnold		Coweta, Georgia	Georgia	Farmer	Head
1930	William Arnold		Page, Iowa	Illinois	Farmer	Head
1940	William A. Arnold	67	Clay-County, Arkansas	Missouri	Farmer	Head
1910	William B. Arnold		Summit, Ohio	Ohio	Car Repair	Head
1940	William Arnold	48	Cass-County, North Dakota	Arkansas	Train Dispatch	Head
1920	William Arnold		Will, Illinois	Illinois	Farmer	Head
1940	William R Arnold	73	Wapello-County, Iowa	Iowa	Farmer	Head
1930	William J Arnold		Lubbock, Texas	Missouri	None	Head
1920	William Arnold		Decatur, Tennessee	Tennessee	—	Head
1910	William Arnold		Jo Daviess, Illinois	Illinois	Farmer	Head
1940	William C. Arnold	51	Stillwater-County, Montana	Minnesota	Farmer	Head
1920	William Arnold		Somerset, Pennsylvania	Pennsylvania	—	Son
1900	William A. Arnold	12	Kanawha, West Virginia	West Virginia	—	Son
1920	William Arnold		Stearns, Minnesota	Minnesota	Farmer	Head
1940	William Arnold	25	Onslow-County, North Carolina	North Carolina	Farming	Son
1920	William J Arnold		Logan, Illinois	Illinois	—	Son

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About William Arnold US Census Records & Model Tree

We've indexed 10017 free, proprietary US Census records for William Arnold across 1900–1950, covering 50 states and DC: Alabama, Alaska, 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 10017 US Census records for William Arnold, from 1900 to 1950, across 50 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 Arnold'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 Arnold 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 Arnold records from the 1900 through 1950 US Federal Census, across 50 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.