How many James Irwin census records do you have?

We have 2953 US Census records for James Irwin, from 1900 to 1950, across 49 states and DC.

What's in a James Irwin census record?

You'll see James'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 James Irwin'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 James Irwin census records free?

Yes. All James Irwin 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 James Irwin?

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

How do I find James Irwin 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 James Irwin?

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.

James Irwin — US Census Records & Model Tree

We found 2953 free census records for James Irwin across 6 census years (1900–1950), in 49 states and DC and 842 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 2953 records for James Irwin US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	James Irwin	54	Montgomery-County, Indiana	Indiana	Farm Laborer	Head
1930	James M Irwin		Indiana, Pennsylvania	Pennsylvania	Retired	Head
1940	James Irwin	12	Troup-County, Georgia	Alabama	—	Son
1910	James Irwin		Union, New Jersey	Pennsylvania	Fireman	Head
1940	James Irwin	29	New-York-County, New York	New York	Truck Driver	Head
1920	James T Irwin		Allegheny, Pennsylvania	Pennsylvania	Carpenter	Head
1940	James Irwin	44	Wayne-County, Michigan	Pennsylvania	Steam Roller Fireman	Head
1940	James Junior Irwin	21	Montgomery-County, Indiana	Indiana	Farm Laborer	Son
1940	James Irwin	10	Cook-County, Illinois	Illinois	—	Son
1940	James Irwin	10	Crawford-County, Pennsylvania	Pennsylvania	—	Son
1940	James Irwin	18	Hancock-County, Ohio	Ohio	Laborer	Son
1910	James Irwin		Washington, Pennsylvania	Pennsylvania	Farmer	Head
1940	James T. Irwin	11	Polk-County, Iowa	Iowa	—	Son
1910	James A Irwin		San Francisco, California	Canada	Teamster	Head
1930	James C Irwin		Boyd, Kentucky	Ohio	Clerk	Head
1940	James Jr. Irwin	13	Saginaw-County, Michigan	Michigan	—	Son
1910	James A Irwin		Delaware, Pennsylvania	Pennsylvania	Farm Laborer	Head
1940	James Irwin	27	Allegheny-County, Pennsylvania	Pennsylvania	Miner	Head
1940	James M. Jr. Irwin	48	Union-County, New Jersey	New Jersey	Electrician	Head
1910	James E. Irwin		Lake, Minnesota	Canada	Electrician	Son
1940	James E Irwin	11	Pickaway-County, Ohio	Ohio	—	Son
1940	James S. Irwin	17	Fulton-County, Georgia	Georgia	—	Son
1940	James Irwin	20	Middlesex-County, Massachusetts	Massachusetts	Electrotype	Son
1940	James Irwin	60	Anderson-County, Tennessee	Tennessee	Farmer	Head
1940	James Irwin	15	Cook-County, Illinois	Illinois	—	Son
1910	James Irwin		New York, New York	Ireland	Own Income	Head
1940	James G. Irwin	13	Franklin-County, Ohio	Ohio	—	Son
1930	James Irwin		Westmoreland, Pennsylvania	Pennsylvania	None	Son
1940	James E. Irwin	21	Marion-County, Indiana	Indiana	Stock Boy	Son
1920	James H. Irwin		Allegheny, Pennsylvania	Pennsylvania	Salesman	Son

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About James Irwin US Census Records & Model Tree

We've indexed 2953 free, proprietary US Census records for James Irwin across 1900–1950, covering 49 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, 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 James 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 2953 US Census records for James Irwin, from 1900 to 1950, across 49 states and DC.
: You'll see James'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 James Irwin'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 James Irwin 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 James Irwin records from the 1900 through 1950 US Federal Census, across 49 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.