How many John Donnelly census records do you have?

We have 7046 US Census records for John Donnelly, from 1900 to 1950, across 49 states, DC, and 1 territory.

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

Yes. All John Donnelly 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 Donnelly?

We have John Donnelly records from the 1900 through 1950 US Federal Census, across 49 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find John Donnelly 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 Donnelly?

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 Donnelly — US Census Records & Model Tree

We found 7046 free census records for John Donnelly across 6 census years (1900–1950), in 49 states, DC, and 1 territory and 673 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Donnelly Census Records by State & County

Records per state:

Census Record Search

First Name

Middle Name

Last Name (Required)

Census Year

State

Birth Year

Year Range

Birthplace

Age From

Age To

Exact match: Name Location Year

Alternate First Names (comma-separated)

Alternate Last Names (comma-separated)

County

Sex

Marital Status

Race

Relationship to Head

Occupation

Census Page ID

Family Members (in same household)

Search Records

Showing of 7046 records for John Donnelly US Census, ranked by Model Tree richness

No records match your filters.

Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John J. Donnelly	24	Charleston-County, South Carolina	South Carolina	Machinist Helper	Son
1940	John F. Donnelly	28	Cuyahoga-County, Ohio	Ohio	40	Head
1930	John E. Donnelly		Genesee, Michigan	Michigan	None	Son
1930	John T. Donnelly		Essex, New Jersey	New Jersey	Chauffeur	Son
1940	John Donnelly	40	Kings-County, New York	Ireland	Lineman	Head
1940	John B. Donnelly	27	Ottawa-County, Michigan	Michigan	Manager	Son
1940	John P. Donnelly	21	Jefferson-County, Kentucky	Kentucky	Clerk	Head
1930	John Donnelly		Bronx, New York	New York	Pat.	Son
1910	John Donnelly		Kings, New York	Ireland	Truck Driver	Head
1940	John J Donnelly	57	Kings-County, New York	Ireland	Laborer	Head
1930	John J Donnelly		Philadelphia, Pennsylvania	Ireland	Watchman	Head
1930	John H. Donnelly		Union, New Jersey	England	—	Head
1920	John J. Donnelly		New York, New York	Ireland	Deliveryman	Head
1940	John Donnelly	60	Marion-County, Indiana	Canada	—	Head
1920	John Donnelly		Providence, Rhode Island	Rhode Island	Machinist	Head
1930	John Donnelly		Philadelphia, Pennsylvania	Ireland	Painter	Head
1940	John Donnelly	55	Summit-County, Ohio	Scotland	Link Man	Head
1930	John J. Donnelly		Essex, Massachusetts	England	Laster	Head
1940	John Donnelly	68	Lancaster-County, Pennsylvania	Pennsylvania	Truck Driver	Head
1940	John Donnelly	46	New-York-County, New York	Ireland	Laborer	Head
1920	John C. Donnelly		Kings, New York	Ireland	Superintendent	Head
1940	John J. Donnelly	87	Fayette-County, Pennsylvania	New York	—	Head
1940	John Jr. Donnelly	21	Bronx-County, New York	New Jersey	Messenger	Son
1910	John Donnelly		Sonoma, California	Ireland	Engineer	Head
1920	John Jr. Donnelly		Essex, Massachusetts	Massachusetts	Dresser Tender	Son
1940	John Donnelly	18	Suffolk-County, Massachusetts	Massachusetts	Laborer	Son
1940	John Donnelly	12	Allegheny-County, Pennsylvania	Pennsylvania	—	Son
1940	John Donnelly	14	Will-County, Illinois	Illinois	—	Son
1910	John C Donnelly		Worcester, Massachusetts	England	Machinist	Head
1920	John Donnelly		Hudson, New Jersey	New Jersey	—	Son

Load More John Donnelly Census Records

About John Donnelly US Census Records & Model Tree

We've indexed 7046 free, proprietary US Census records for John Donnelly across 1900–1950, covering 49 states, DC, and 1 territory: Alabama, Alaska, 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, Puerto Rico, 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 7046 US Census records for John Donnelly, from 1900 to 1950, across 49 states, DC, and 1 territory.
: 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 Donnelly'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 Donnelly 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 Donnelly records from the 1900 through 1950 US Federal Census, across 49 states, DC, and 1 territory. 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 Donnelly US Census Records

James Donnelly Margaret Donnelly Mary Donnelly Thomas Donnelly William Donnelly

All Donnelly census records →

Browse More Surnames

Dillon Dixon Doherty Dolan Donahue Donaldson Donohue Donovan Dooley Doran Dorsey Dougherty

← Back to US Census Records