How many John Underwood census records do you have?

We have 4074 US Census records for John Underwood, from 1900 to 1950, across 49 states, DC, and 1 territory.

What's in a John Underwood census record?

You'll see John'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 John Underwood'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 John Underwood census records free?

Yes. All John Underwood 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 John Underwood?

We have John Underwood records from the 1900 through 1950 US Federal Census, across 49 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find John Underwood 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 John Underwood?

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.

John Underwood — US Census Records & Model Tree

We found 4074 free census records for John Underwood across 6 census years (1900–1950), in 49 states, DC, and 1 territory and 1159 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Underwood Census Records by State & County

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Showing of 4074 records for John Underwood US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John F. Underwood	36	Buchanan-County, Missouri	Missouri	Deliveryman	Head
1940	John Underwood	31	Stoddard-County, Missouri	Missouri	Laborer	Head
1940	John Underwood	44	Meigs-County, Tennessee	Tennessee	Farmer	Head
1940	John N. Underwood	39	Okfuskee-County, Oklahoma	West Virginia	Machinist	Head
1940	John Underwood	20	Hamilton-County, Ohio	Ohio	Clerk	Son
1920	John L. Underwood		Van Buren, Arkansas	Mississippi	Farmer	Head
1940	John Underwood	45	Tishomingo-County, Mississippi	Alabama	Farmer	Head
1940	John Underwood	54	Philadelphia-County, Pennsylvania	Virginia	Office Bldg.	Head
1930	John Underwood		Perry, Alabama	Alabama	Farmer	Head
1940	John O Underwood	62	Isabella-County, Michigan	Michigan	Laborer	Head
1940	John Underwood	52	Champaign-County, Ohio	Ohio	Farmer	Head
1940	John Underwood	82	Jackson-County, Missouri	England	—	Head
1940	John M. Underwood	45	Sullivan-County, Indiana	Indiana	Miner	Head
1930	John Underwood		Baldwin, Alabama	Alabama	Farmer	Head
1900	John Underwood	48	Franklin, New York	Canada	Farmer	Head
1910	John E. Underwood		Greene, Alabama	Alabama	Laborer	Son
1920	John Underwood		Escambia, Florida	Alabama	Butler	Head
1920	John Underwood		Perry, Alabama	Alabama	Laborer	Son
1910	John B Underwood		Doddridge, West Virginia	West Virginia	Farmer	Son
1930	John W. Underwood		Cedar, Missouri	Missouri	Farmer	Head
1920	John A. Underwood		Lee, North Carolina	North Carolina	Farmer	Head
1940	John Underwood	15	Vermilion-County, Illinois	Illinois	Laborer	Son
1940	John W. Underwood	49	Hall-County, Georgia	Georgia	Farmer	Head
1920	John H Underwood		Bullitt, Kentucky	Kentucky	—	Son
1940	John Underwood	13	Autauga-County, Alabama	Alabama	—	Son
1940	John H. Underwood	14	Perry-County, Alabama	Alabama	Porter	Son
1940	John L. Underwood	20	Polk-County, Florida	Alabama	Laborer	Son
1920	John H Underwood		Lee, Iowa	Iowa	None	Son
1920	John Underwood		Henry, Alabama	Alabama	Laborer	Son
1940	John Underwood	12	Butler-County, Ohio	Ohio	—	Son

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About John Underwood US Census Records & Model Tree

We've indexed 4074 free, proprietary US Census records for John Underwood across 1900–1950, covering 49 states, DC, and 1 territory: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, 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 John 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 4074 US Census records for John Underwood, from 1900 to 1950, across 49 states, DC, and 1 territory.
: You'll see John'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 John Underwood'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 John Underwood 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 John Underwood records from the 1900 through 1950 US Federal Census, across 49 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.