How many John Olson census records do you have?

We have 11273 US Census records for John Olson, from 1900 to 1950, across 50 states and DC.

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

Yes. All John Olson 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 Olson?

We have John Olson 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 Olson 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 Olson?

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 Olson — US Census Records & Model Tree

We found 11273 free census records for John Olson across 6 census years (1900–1950), in 50 states and DC and 1090 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 11273 records for John Olson US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John A. Olson	47	Barron-County, Wisconsin	Wisconsin	Farming	Head
1940	John Olson	27	Fergus-County, Montana	Montana	Partner	Son
1940	John Olson	67	Webster-County, Iowa	Illinois	—	Son
1940	John Olson	33	Pierce-County, Washington	Wisconsin	Wood And Fuel	Son
1930	John Olson		Kings, New York	New York	Accountant	Son
1930	John A. Olson		Cook, Illinois	Illinois	—	Son
1930	John Olson		Cook, Illinois	Illinois	Driver	Head
1940	John Louis Olson	20	Atchison-County, Kansas	Kansas	Farmer	Son
1930	John B. Olson		Hubbard, Minnesota	Sweden	Farmer	Head
1940	John Olson	53	Pottawattamie-County, Iowa	Iowa	Farmer	Head
1930	John L Olson		Sanpete, Utah	Utah	Farmer	Head
1930	John Olson		Buffalo, Wisconsin	Wisconsin	Laborer	Head
1940	John Q. Olson	65	Pembina-County, North Dakota	Iceland	Farmer	Head
1930	John A. Olson		Will, Illinois	Illinois	Machinist	Head
1920	John J. Olson		Hennepin, Minnesota	Norway	Operator	Head
1930	John E. Olson		Pocahontas, Iowa	Iowa	Farmer	Head
1940	John H. Olson	66	Greenwood-County, Kansas	Kansas	Salesman	Head
1930	John A. Olson		Spokane, Washington	Wisconsin	Doughmixer	Head
1930	John B Olson		Cook, Illinois	Norway	Clerk	Head
1940	John Olson	63	Butler-County, Kansas	Denmark	Farmer	Head
1940	John E. Olson	44	Atchison-County, Kansas	Kansas	Farmer	Head
1940	John H. Olson	50	Clark-County, Wisconsin	Wisconsin	Farmer	Head
1930	John Olson		Isanti, Minnesota	Minnesota	Farmer	Head
1930	John B Olson		Kandiyohi, Minnesota	Norway	None	Head
1930	John A. Olson		Pembina, North Dakota	North Dakota	None	Son
1930	John Olson		Madison, Nebraska	Illinois	Farmer	Head
1940	John Olson	19	King-County, Washington	Washington	—	Son
1910	John M Olson		Kandiyohi, Minnesota	Minnesota	—	Son
1910	John Olson		Saline, Kansas	Kansas	—	Son
1900	John Olson	10	Juneau, Wisconsin	Wisconsin	—	Son

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About John Olson US Census Records & Model Tree

We've indexed 11273 free, proprietary US Census records for John Olson 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 11273 US Census records for John Olson, 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 Olson'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 Olson 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 Olson 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.

Other Olson US Census Records

Albert Olson Alice Olson Andrew Olson Anna Olson Annie Olson Arthur Olson Carl Olson Charles Olson Edward Olson Emma Olson George Olson Mary Olson Ole Olson Oscar Olson Robert Olson Ruth Olson William Olson

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