How many William Mills census records do you have?

We have 7678 US Census records for William Mills, from 1900 to 1950, across 50 states and DC.

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

Yes. All William Mills 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 Mills?

We have William Mills 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 Mills 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 Mills?

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 Mills — US Census Records & Model Tree

We found 7678 free census records for William Mills across 6 census years (1900–1950), in 50 states and DC and 1550 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 7678 records for William Mills US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1910	William J. Mills		Fauquier, Virginia	Virginia	Farm Laborer	Son
1910	William H. Mills		Dorchester, Maryland	Maryland	—	Son
1940	William Mills	33	New-York-County, New York	New York	44	Head
1940	William Mills	32	Kings-County, New York	New York	Meter Tester	Head
1910	William Mills		Lee, Alabama	Alabama	—	Son
1940	William C. Mills	22	Multnomah-County, Oregon	Washington	Presser	Son
1940	William Mills	32	San-Francisco-County, California	California	Driver	Head
1930	William B. Jr. Mills		Faulkner, Arkansas	Arkansas	—	Son
1930	William G Mills		Montgomery, Missouri	Missouri	Asst Postmaster	Son
1930	William J Mills		Meade, Kentucky	Kentucky	None	Head
1900	William J. Mills	38	Halifax, Virginia	Virginia	Farmer	Head
1930	William P. Mills		Tuscaloosa, Alabama	Alabama	Farmer	Head
1940	William Mills	50	Essex-County, Massachusetts	Scotland	Machinist	Head
1910	William Mills		Baltimore, Maryland	Maryland	Laborer	Head
1940	William H Jr Mills	36	Richland-County, South Carolina	South Carolina	Civil Engineer	Head
1940	William C. Mills	53	Multnomah-County, Oregon	Washington	Presser	Head
1940	William Mills	42	New-York-County, New York	North Carolina	Laborer	Head
1930	William Mills		Middlesex, New Jersey	New Jersey	Corker	Head
1920	William Mills		Gaston, North Carolina	South Carolina	Scrubber	Son
1910	William Mills		Dodge, Georgia	Georgia	—	Son
1920	William Mills		Union, North Carolina	North Carolina	—	Son
1910	William J Mills		Aiken, South Carolina	South Carolina	Farm	Son
1900	William Mills	47	Washington, Georgia	Georgia	Farmer	Head
1920	William C Mills		Floyd, Georgia	Georgia	Farming	Head
1920	William E Mills		Mcdowell, West Virginia	Virginia	—	Son
1920	William Mills		Hudson, New Jersey	Scotland	Engineer	Head
1940	William R Mills	12	Chippewa-County, Michigan	Michigan	—	Son
1940	William J Mills	14	Blaine-County, Oklahoma	Oklahoma	—	Son
1910	William Mills		Laurens, South Carolina	South Carolina	Saw Mill	Son
1910	William Mills		Lawrence, Illinois	Illinois	Farmer	Head

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About William Mills US Census Records & Model Tree

We've indexed 7678 free, proprietary US Census records for William Mills 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 7678 US Census records for William Mills, 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 Mills'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 Mills 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 Mills 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.

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