How many John Hahn census records do you have?

We have 2876 US Census records for John Hahn, from 1900 to 1950, across 49 states and DC.

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

Yes. All John Hahn 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 Hahn?

We have John Hahn 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 Hahn 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 Hahn?

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 Hahn — US Census Records & Model Tree

We found 2876 free census records for John Hahn across 6 census years (1900–1950), in 49 states and DC and 630 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Hahn 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 2876 records for John Hahn US Census, ranked by Model Tree richness

No records match your filters.

Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	John Jr. Hahn		Ripley, Indiana	Indiana	Laborer	Son
1940	John Hahn	68	Saginaw-County, Michigan	Michigan	Farmer	Head
1940	John Hahn	15	Frederick-County, Maryland	Maryland	Clerk	Son
1910	John Hahn		Allegheny, Pennsylvania	Germany	Salesman	Head
1910	John Hahn		Baltimore, Maryland	Maryland	Engineer	Head
1910	John Hahn		Baltimore, Maryland	Maryland	—	Son
1920	John Hahn		New Castle, Delaware	Delaware	None	Son
1940	John Hahn	40	Lake-County, South Dakota	Illinois	Farmer	Head
1920	John Hahn		Livingston, Illinois	Germany	Farmer	Head
1910	John Hahn		Saginaw, Michigan	Michigan	Farmer	Head
1910	John Hahn		Milwaukee, Wisconsin	Wisconsin	Slather	Son
1900	John Hahn	41	New York, New York	Germany	Janitor	Head
1930	John H Hahn		Clinton, Iowa	Iowa	Farmer	Head
1930	John F. Hahn		Lake, Indiana	Poland	Laborer	Head
1940	John W. Hahn	27	Marshall-County, West Virginia	West Virginia	Enameler	Son
1920	John Hahn		Posey, Indiana	Indiana	Farmer	Head
1940	John L. Hahn	41	Washington-County, Maryland	Maryland	General Work	Head
1910	John Hahn		Defiance, Ohio	Ohio	Laborer	Son
1940	John Hahn	37	Sedgwick-County, Kansas	Kansas	Farmer	Head
1930	John Hahn		Multnomah, Oregon	Oregon	Garbage Man	Son
1940	John Hahn	23	Essex-County, New Jersey	New Jersey	Sprayer	Son
1940	John Hahn	63	Marshall-County, Illinois	Illinois	Farmer	Head
1940	John Hahn	39	Larimer-County, Colorado	Nebraska	Farmer	Head
1930	John H. Hahn		Sibley, Minnesota	Minnesota	Farmer	Head
1930	John Hahn		Jefferson, Kentucky	Kentucky	Laborer	Son
1940	John A Hahn	53	Multnomah-County, Oregon	Russia	Carpenter	Head
1910	John B Hahn		Philadelphia, Pennsylvania	Maryland	Barber	Head
1930	John Hahn		Keith, Nebraska	Germany	Farmer	Head
1940	John Hahn	58	Ozaukee-County, Wisconsin	Wisconsin	Farming	Head
1940	John Hahn	60	Orleans-County, Louisiana	Louisiana	Watchman	Head

Load More John Hahn Census Records

About John Hahn US Census Records & Model Tree

We've indexed 2876 free, proprietary US Census records for John Hahn 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, 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, 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 2876 US Census records for John Hahn, 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 Hahn'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 Hahn 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 Hahn 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.

Other Hahn US Census Records

William Hahn

All Hahn census records →

Browse More Surnames

Gunn Gustafson Guthrie Haas Hagan Haggerty Haines Hale Haley Hall Hamilton Hammond

← Back to US Census Records