How many Thomas Campbell census records do you have?

We have 8944 US Census records for Thomas Campbell, from 1900 to 1950, across 50 states, DC, and 1 territory.

What's in a Thomas Campbell census record?

You'll see Thomas'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 Thomas Campbell'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 Thomas Campbell census records free?

Yes. All Thomas Campbell 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 Thomas Campbell?

We have Thomas Campbell records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find Thomas Campbell 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 Thomas Campbell?

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.

Thomas Campbell — US Census Records & Model Tree

We found 8944 free census records for Thomas Campbell across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1591 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 8944 records for Thomas Campbell US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Thomas M Campbell	43	Indiana-County, Pennsylvania	Pennsylvania	Farmer	Head
1940	Thomas R. Campbell	37	Cuyahoga-County, Ohio	Ohio	President	Head
1940	Thomas Jr. Campbell	38	Queens-County, New York	New York	Laborer	Son
1940	Thomas Jr. Campbell	34	Monroe-County, New York	New York	Teacher	Son
1940	Thomas Campbell	30	Greenville-County, South Carolina	North Carolina	Farmer	Head
1940	Thomas P Campbell	31	Allegheny-County, Pennsylvania	Pennsylvania	Millwright	Head
1940	Thomas C. Campbell	26	Providence-County, Rhode Island	Rhode Island	Sales Manager	Son
1930	Thomas Campbell		Mercer, Pennsylvania	Pennsylvania	—	Head
1940	Thomas W Campbell	40	Champaign-County, Illinois	Illinois	Candymaker	Head
1940	Thomas R. Campbell	26	Mercer-County, Pennsylvania	Pennsylvania	Clerk	Son
1940	Thomas Jr. Campbell	32	Yazoo-County, Mississippi	Mississippi	Lawyer	Head
1940	Thomas Campbell	34	Cook-County, Illinois	Illinois	Chauffeur	Head
1940	Thomas Campbell	39	Summit-County, Ohio	Pennsylvania	Mechanic	Son
1920	Thomas J Campbell		Somerset, New Jersey	New Jersey	Carpenter	Son
1940	Thomas H. Campbell	40	Philadelphia-County, Pennsylvania	England	Real Estate	Head
1920	Thomas Campbell		New York, New York	New York	Clerk	Son
1920	Thomas A. Campbell		Allegheny, Pennsylvania	Pennsylvania	Labor	Son
1930	Thomas Campbell		Hamilton, Ohio	Ohio	Gas & Spray	Son
1930	Thomas E Campbell		Dallas, Texas	Texas	—	Son
1940	Thomas B. Campbell	50	Tompkins-County, New York	New York	Manager	Son
1940	Thomas Campbell	21	Macon-County, Illinois	Iowa	Truck Driver	Son
1930	Thomas Campbell		Rockingham, New Hampshire	Ireland	Stable Work	Head
1910	Thomas E Campbell		Anderson, South Carolina	South Carolina	Policeman	Head
1940	Thomas H. Campbell	47	Essex-County, Massachusetts	Massachusetts	—	Head
1940	Thomas Campbell	52	Bureau-County, Illinois	Illinois	Laborer	Head
1920	Thomas Campbell		Charleston, South Carolina	South Carolina	Longshoreman	Head
1920	Thomas Campbell		Ouachita, Louisiana	Ireland	Engineer	Head
1920	Thomas Jr. Campbell		Philadelphia, Pennsylvania	Ireland	Retail Merchant	Head
1920	Thomas H. Campbell		Denver, Colorado	Pennsylvania	Accountant	Head
1920	Thomas H. Campbell		Harford, Maryland	Maryland	Laborer	Head

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About Thomas Campbell US Census Records & Model Tree

We've indexed 8944 free, proprietary US Census records for Thomas Campbell across 1900–1950, covering 50 states, DC, and 1 territory: 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, 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 Thomas 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 8944 US Census records for Thomas Campbell, from 1900 to 1950, across 50 states, DC, and 1 territory.
: You'll see Thomas'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 Thomas Campbell'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 Thomas Campbell 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 Thomas Campbell records from the 1900 through 1950 US Federal Census, across 50 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.

Other Campbell US Census Records

Albert Campbell Alice Campbell Anna Campbell Annie Campbell Arthur Campbell Bessie Campbell Catherine Campbell Charles Campbell Clara Campbell Clarence Campbell David Campbell Donald Campbell Dorothy Campbell Earl Campbell Edith Campbell Edna Campbell Edward Campbell Elizabeth Campbell Emma Campbell Ethel Campbell Florence Campbell Frank Campbell Fred Campbell George Campbell Grace Campbell Harry Campbell Helen Campbell Henry Campbell Ida Campbell James Campbell Jessie Campbell John Campbell Joseph Campbell Lula Campbell Margaret Campbell Martha Campbell Mary Campbell Mildred Campbell Minnie Campbell Nellie Campbell Richard Campbell Robert Campbell Ruth Campbell Sarah Campbell Walter Campbell William Campbell Willie Campbell

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