How many John Dugan census records do you have?

We have 4271 US Census records for John Dugan, from 1900 to 1950, across 48 states and DC.

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

Yes. All John Dugan 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 Dugan?

We have John Dugan records from the 1900 through 1950 US Federal Census, across 48 states and DC. Use the year and state filters to narrow your results.

How do I find John Dugan 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 Dugan?

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 Dugan — US Census Records & Model Tree

We found 4271 free census records for John Dugan across 6 census years (1900–1950), in 48 states and DC and 614 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Dugan Census Records by State & County

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Showing of 4271 records for John Dugan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	John F. Dugan		Providence, Rhode Island	Rhode Island	Weaver	Son
1930	John Dugan		Philadelphia, Pennsylvania	Ireland	—	Head
1930	John Dugan		New York, New York	Ireland	Manager	Head
1910	John Dugan		New York, New York	New York	—	Head
1940	John Dugan	59	Washington-County, Pennsylvania	Italy	Owner	Head
1930	John Dugan		Philadelphia, Pennsylvania	Ireland	Carpenter	Head
1920	John Dugan		New York, New York	Ireland	Roaster	Head
1930	John Dugan		Monmouth, New Jersey	New Jersey	Labor	Head
1930	John Dugan		New York, New York	New York	—	Son
1940	John Dugan	28	Queens-County, New York	New York	Salesman	Son
1940	John Jr. Dugan	13	Garland-County, Arkansas	Arkansas	—	Son
1920	John Dugan		Niagara, New York	New York	—	Son
1910	John Dugan		Strafford, New Hampshire	Ireland	Watchman	Head
1930	John Dugan		Philadelphia, Pennsylvania	Pennsylvania	—	Son
1940	John Dugan	16	Camden-County, New Jersey	New Jersey	—	Son
1930	John A. Dugan		Marin, California	California	—	Son
1930	John E. Dugan		Montgomery, Pennsylvania	Pennsylvania	Carder	Son
1920	John Dugan		Allegheny, Pennsylvania	Pennsylvania	Laborer	Son
1920	John Dugan		Kings, New York	New York	—	Son
1940	John Dugan	19	Bucks-County, Pennsylvania	Pennsylvania	New Worker	Son
1930	John Jr. Dugan		Kings, New York	New York	Clerk	Son
1940	John J. Dugan	37	Sedgwick-County, Kansas	Kansas	Farmer	Head
1940	John J. Dugan	22	Marion-County, Indiana	Indiana	Grocery Warehouse	Son
1900	John Dugan	39	New York, New York	Ireland	Teamster	Head
1920	John Dugan		Allegheny, Pennsylvania	Pennsylvania	None	Son
1910	John Dugan		Kings, New York	Ireland	Laborer	Head
1930	John Dugan		Onondaga, New York	New York	—	Son
1930	John Dugan		Middlesex, New Jersey	New Jersey	—	Son
1910	John Dugan		Montour, Pennsylvania	Ireland	—	Head
1930	John Dugan		New York, New York	New York	—	Son

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About John Dugan US Census Records & Model Tree

We've indexed 4271 free, proprietary US Census records for John Dugan across 1900–1950, covering 48 states and DC: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, 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 4271 US Census records for John Dugan, from 1900 to 1950, across 48 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 Dugan'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 Dugan 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 Dugan records from the 1900 through 1950 US Federal Census, across 48 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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