How many John Brock census records do you have?

We have 3256 US Census records for John Brock, from 1900 to 1950, across 50 states and DC.

What's in a John Brock 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 Brock'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 Brock census records free?

Yes. All John Brock 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 Brock?

We have John Brock 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 John Brock 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 Brock?

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 Brock — US Census Records & Model Tree

We found 3256 free census records for John Brock across 6 census years (1900–1950), in 50 states and DC and 1047 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Brock Census Records by State & County

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Showing of 3256 records for John Brock US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	John Brock		Bexar, Texas	Texas	—	Son
1940	John H. Brock	35	Polk-County, Tennessee	Tennessee	Farming	Head
1930	John Brock		Wise, Virginia	Virginia	—	Son
1910	John Brock		Marshall, Indiana	Indiana	Farmer	Head
1930	John M Brock		Pickens, Georgia	Georgia	Farmer	Head
1940	John Brock	12	Bell-County, Kentucky	Kentucky	—	Son
1910	John Brock		Banks, Georgia	Georgia	Farm Laborer	Son
1920	John Brock		Bell, Kentucky	Kentucky	—	Son
1910	John Brock		Bell, Kentucky	Kentucky	—	Son
1940	John Brock	11	Knox-County, Kentucky	Kentucky	—	Son
1910	John Brock		Jessamine, Kentucky	Kentucky	Farmer	Head
1940	John B Brock	10	Troup-County, Georgia	Georgia	—	Son
1920	John H Brock		Cowley, Kansas	Kansas	—	Son
1940	John Brock	46	Butler-County, Ohio	Kentucky	Cement Worker	Head
1940	John Brock	50	Mesa-County, Colorado	Italy	Farmer	Head
1940	John J. Brock	39	Milwaukee-County, Wisconsin	Wisconsin	Janitor	Head
1940	John H. Brock	52	Cook-County, Illinois	Illinois	Janitor	Head
1940	John Brock	11	Harris-County, Texas	Texas	—	Son
1910	John D. Brock		Bell, Kentucky	Kentucky	Daywork	Son
1930	John R Brock		Rock, Wisconsin	Wisconsin	Farmer	Head
1910	John Brock		Washington, Florida	Florida	Farmer	Head
1930	John H. Brock		Tarrant, Texas	Georgia	Loco Engineer	Head
1940	John Brock	28	Jackson-County, Missouri	Kansas	Operator Bottle Machine	Son
1940	John H Brock	79	Pocahontas-County, West Virginia	West Virginia	—	Head
1940	John A Brock	28	Champaign-County, Illinois	Mississippi	Car Washer	Head
1940	John W. Brock	13	Jessamine-County, Kentucky	Kentucky	—	Son
1940	John H. Brock	35	Floyd-County, Georgia	Georgia	Cotton Mill	Head
1910	John Brock		Bell, Kentucky	Kentucky	Carpenter	Son
1940	John C. Brock	44	Forsyth-County, North Carolina	Georgia	Officer	Head
1920	John Brock		Hudson, New Jersey	New York	None	Son

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About John Brock US Census Records & Model Tree

We've indexed 3256 free, proprietary US Census records for John Brock 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 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 3256 US Census records for John Brock, from 1900 to 1950, across 50 states and DC.
: 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 Brock'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 Brock 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 Brock 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.