How many John Welsh census records do you have?

We have 4919 US Census records for John Welsh, from 1900 to 1950, across 49 states and DC.

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

Yes. All John Welsh 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 Welsh?

We have John Welsh 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 John Welsh 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 Welsh?

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 Welsh — US Census Records & Model Tree

We found 4919 free census records for John Welsh across 6 census years (1900–1950), in 49 states and DC and 818 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Welsh Census Records by State & County

Records per state:

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Showing of 4919 records for John Welsh US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	John E Welsh		Baltimore, Maryland	Maryland	—	Son
1930	John Welsh		Eddy, North Dakota	North Dakota	—	Son
1910	John R Welsh		Clinton, Missouri	Pennsylvania	Janitor	Head
1930	John Welsh		Essex, New Jersey	New Jersey	None	Son
1930	John J. Welsh		Essex, Massachusetts	Massachusetts	—	Son
1900	John M. Welsh	45	Suwannee, Florida	Georgia	Farmer	Head
1910	John J. Welsh		New York, New York	Canada	—	Son
1940	John Welsh	31	Hudson-County, New Jersey	Scotland	Mixer	Son
1940	John Jr Welsh	17	Westchester-County, New York	New York	—	Son
1930	John B Welsh		Henrico, Virginia	Pennsylvania	Attorney	Head
1940	John Welsh	54	Hudson-County, New Jersey	Scotland	Machinist	Head
1940	John Welsh	21	Morris-County, New Jersey	New Jersey	Clerk	Son
1900	John Welsh	6	Laramie, Wyoming	Colorado	At School	Son
1930	John J. Welsh		Westchester, New York	New Jersey	Postman	Head
1940	John W. Welsh	10	Kings-County, New York	New York	—	Son
1930	John Welsh		St Clair, Illinois	Missouri	Laborer	Head
1940	John G. Welsh	16	Suffolk-County, Massachusetts	Massachusetts	—	Son
1940	John, Jr Welsh	14	Allegheny-County, Pennsylvania	Pennsylvania	—	Son
1940	John Jr. Welsh	14	St.-Louis-City-County, Missouri	Missouri	—	Son
1930	John Welsh		Philadelphia, Pennsylvania	Penna	Chauffer	Son
1940	John P. Welsh	45	Essex-County, Massachusetts	Massachusetts	Postmaster	Head
1940	John P. Welsh	47	Tuscarawas-County, Ohio	PENNSYLVANIA	Salesman	Head
1940	John J. Welsh	42	Cattaraugus-County, New York	Ireland	Pumper	Head
1930	John Jr Welsh		Delaware, Pennsylvania	Pennsylvania	—	Son
1940	John H. Welsh	36	Maricopa-County, Arizona	Arizona	Proprietor	Head
1900	John C Welsh	30	Camden, New Jersey	Pennsylvania	Moulder	Head
1940	John Welsh	61	Decatur-County, Indiana	Indiana	—	Head
1930	John Welsh		Allegheny, Pennsylvania	Irish Free State	—	Head
1930	John Jr. Welsh		Kings, New York	New York	—	Son
1940	John P. Welsh	34	Philadelphia-County, Pennsylvania	Pennsylvania	Lawyer	Head

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About John Welsh US Census Records & Model Tree

We've indexed 4919 free, proprietary US Census records for John Welsh across 1900–1950, covering 49 states and DC: Alabama, 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 4919 US Census records for John Welsh, from 1900 to 1950, across 49 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 Welsh'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 Welsh 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 Welsh 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.

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