How many John Blackwell census records do you have?

We have 3036 US Census records for John Blackwell, from 1900 to 1950, across 45 states and DC.

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

Yes. All John Blackwell 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 Blackwell?

We have John Blackwell records from the 1900 through 1950 US Federal Census, across 45 states and DC. Use the year and state filters to narrow your results.

How do I find John Blackwell 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 Blackwell?

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 Blackwell — US Census Records & Model Tree

We found 3036 free census records for John Blackwell across 6 census years (1900–1950), in 45 states and DC and 849 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Blackwell Census Records by State & County

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Showing of 3036 records for John Blackwell US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	John M. Blackwell		Randolph, Missouri	Missouri	—	Son
1940	John Blackwell	33	Person-County, North Carolina	North Carolina	Laborer	Head
1930	John W. Blackwell		Chesterfield, South Carolina	South Carolina	Farmer	Head
1940	John E. Blackwell	32	Elbert-County, Georgia	Georgia	Farmer	Head
1940	John Blackwell	21	Montgomery-County, Pennsylvania	Pennsylvania	Farm-Hand	Son
1940	John Blackwell	58	Franklin-County, Missouri	Missouri	Farmer	Head
1930	John T. Blackwell		Plymouth, Massachusetts	Massachusetts	Machinist	Head
1940	John Blackwell	67	Massac-County, Illinois	Tennessee	—	Head
1920	John M. Blackwell		Lincoln, Missouri	Virginia	Farmer	Head
1940	John Blackwell	66	Searcy-County, Arkansas	Tennessee	Clerk	Head
1940	John F. Blackwell	55	Lauderdale-County, Mississippi	Mississippi	Farm Work	Head
1930	John R Blackwell		Webster, Missouri	Missouri	Farmer	Head
1940	John Blackwell	69	Jefferson-County, Missouri	Missouri	Farming	Head
1930	John H. Blackwell		Elbert, Georgia	Georgia	Farmer	Head
1920	John Blackwell		Lauderdale, Tennessee	Tennessee	Farmer	Head
1920	John Blackwell		Lancaster, Virginia	Virginia	Farm Hand	Son
1920	John B. Blackwell		None, None	South Carolina	Farmer	Head
1910	John Blackwell		Chariton, Missouri	Missouri	Farmer	Head
1940	John Blackwell	14	Lincoln-County, Georgia	Georgia	—	Son
1940	John Blackwell	39	Greenville-County, South Carolina	North Carolina	Laborer	Head
1930	John H. Blackwell		Cherokee, Georgia	Georgia	Farmer	Head
1920	John Henry Blackwell		Elbert, Georgia	Georgia	Farm Laborer	Son
1920	John Blackwell		Haywood, Tennessee	Tennessee	Farm Helper	Son
1920	John H Blackwell		Dekalb, Alabama	Alabama	Farmer	Head
1940	John Blackwell	34	Sangamon-County, Illinois	Illinois	Laborer	Head
1940	John L. Blackwell	29	Niagara-County, New York	England	Cyanide Mixer	Head
1940	John Blackwell	19	Schuylkill-County, Pennsylvania	Pennsylvania	Laborer	Son
1910	John J Blackwell		Caswell, North Carolina	North Carolina	—	Son
1930	John Blackwell		Luzerne, Pennsylvania	Pennsylvania	—	Son
1930	John H. Blackwell		Spartanburg, South Carolina	South Carolina	Spare Hand	Son

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About John Blackwell US Census Records & Model Tree

We've indexed 3036 free, proprietary US Census records for John Blackwell across 1900–1950, covering 45 states and DC: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, District of Columbia, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, 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 3036 US Census records for John Blackwell, from 1900 to 1950, across 45 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 Blackwell'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 Blackwell 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 Blackwell records from the 1900 through 1950 US Federal Census, across 45 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.