How many John Connolly census records do you have?

We have 5453 US Census records for John Connolly, from 1900 to 1950, across 49 states, DC, and 2 territories.

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

Yes. All John Connolly 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 Connolly?

We have John Connolly records from the 1900 through 1950 US Federal Census, across 49 states, DC, and 2 territories. Use the year and state filters to narrow your results.

How do I find John Connolly 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 Connolly?

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 Connolly — US Census Records & Model Tree

We found 5453 free census records for John Connolly across 6 census years (1900–1950), in 49 states, DC, and 2 territories and 434 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Connolly 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 5453 records for John Connolly US Census, ranked by Model Tree richness

No records match your filters.

Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Connolly	22	Polk-County, Iowa	Iowa	—	Son
1940	John Connolly	38	Philadelphia-County, Pennsylvania	Penna	Helper	Son
1930	John Connolly		Philadelphia, Pennsylvania	Pennsylvania	Mechanic	Son
1940	John Connolly	34	Douglas-County, Nebraska	Nebraska	Printing	Head
1940	John Jr. Connolly	35	Oklahoma-County, Oklahoma	Oklahoma	Justice Of Peace	Head
1940	John J Connolly	31	Jefferson-County, Kentucky	Kentucky	Time Keeper	Head
1940	John P Connolly	26	Jackson-County, Iowa	Iowa	Farmer	Son
1940	John Connolly	39	Providence-County, Rhode Island	Rhode Island	Truck Driver	Head
1940	John Jr. Connolly	49	Polk-County, Iowa	Iowa	Lawyer	Head
1910	John Connolly		Crawford, Ohio	Ireland	Foreman	Head
1920	John Connolly		Kings, New York	Ireland	Machinist	Head
1940	John Connolly	44	Monroe-County, New York	Scotland	Paper Drier Machine	Head
1930	John Connolly		Bronx, New York	Ireland	Policeman	Head
1930	John Connolly		Will, Illinois	Nebraska	Farm Operator	Head
1920	John Connolly		Lincoln, Nebraska	Ireland	Farmer	Head
1940	John Connolly	72	Norfolk-County, Massachusetts	Ireland	—	Head
1930	John Connolly		Queens, New York	Ireland	Therapist	Head
1940	John H. Connolly	49	Providence-County, Rhode Island	Rhode Island	Textile Finisher	Head
1930	John J. Connolly		Jefferson, Kentucky	Kentucky	Physician	Head
1930	John J Connolly		Providence, Rhode Island	Rhode Island	Retired	Head
1940	John Connolly	50	Middlesex-County, Massachusetts	Ireland	Laborer	Head
1920	John Connolly		Middlesex, Massachusetts	Ireland	Laborer	Head
1920	John Connolly		Hudson, New Jersey	Ireland	Fireman	Head
1920	John Connolly		New York, New York	Ireland	Iron Worker	Head
1920	John Connolly		New York, New York	Ireland	Inspector	Head
1910	John Connolly		Kings, New York	Ireland	Watchman	Head
1930	John Connolly		New Castle, Delaware	Delaware	—	Son
1930	John Connolly		Suffolk, Massachusetts	Massachusetts	—	Son
1920	John M. Connolly		Rensselaer, New York	Ireland	Superintendent	Head
1940	John E. Connolly	24	Hillsborough-County, New Hampshire	New Hampshire	—	Son

Load More John Connolly Census Records

About John Connolly US Census Records & Model Tree

We've indexed 5453 free, proprietary US Census records for John Connolly across 1900–1950, covering 49 states, DC, and 2 territories: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, 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, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, 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 5453 US Census records for John Connolly, from 1900 to 1950, across 49 states, DC, and 2 territories.
: 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 Connolly'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 Connolly 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 Connolly records from the 1900 through 1950 US Federal Census, across 49 states, DC, and 2 territories. 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 Connolly US Census Records

James Connolly Mary Connolly

All Connolly census records →

Browse More Surnames

Collier Collins Conley Connell Connelly Conner Connor Connors Conrad Conroy Conway Cook

← Back to US Census Records