How many John Hamilton census records do you have?

We have 16407 US Census records for John Hamilton, from 1900 to 1950, across 50 states, DC, and 1 territory.

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

Yes. All John Hamilton 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 Hamilton?

We have John Hamilton records from the 1900 through 1950 US Federal Census, across 50 states, DC, and 1 territory. Use the year and state filters to narrow your results.

How do I find John Hamilton 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 Hamilton?

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 Hamilton — US Census Records & Model Tree

We found 16407 free census records for John Hamilton across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 2115 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Hamilton Census Records by State & County

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Showing of 16407 records for John Hamilton US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Hamilton	34	Linn-County, Iowa	Iowa	Laborer	Head
1920	John Hamilton		Union, North Carolina	North Carolina	—	Son
1920	John Hamilton		Nevada, Arkansas	Arkansas	Laborer	Son
1940	John Hamilton	39	Worcester-County, Massachusetts	Maine	Mechanic	Head
1940	John Hamilton	39	Baltimore-City-County, Maryland	Maryland	Chief Engineer	Head
1930	John Jr Hamilton		Leavenworth, Kansas	Kansas	Upholsterer	Son
1930	John Hamilton		Calhoun, West Virginia	West Virginia	Proprietor	Son
1920	John A Hamilton		Decatur, Iowa	Illinois	Farmer	Son
1940	John H Hamilton	28	Peoria-County, Illinois	Illinois	Driver Salesman	Head
1940	John Hamilton	37	Summit-County, Ohio	Scotland	Salesman	Head
1930	John C Hamilton		Bexar, Texas	New Mexico	Clerk	Son
1940	John S. Hamilton	40	Passaic-County, New Jersey	Scotland	Machinist	Head
1940	John W. Hamilton	23	Story-County, Iowa	Iowa	Mechanic	Head
1940	John Hamilton	28	Clinton-County, Illinois	Illinois	Fireman	Head
1940	John Hamilton	22	Cuyahoga-County, Ohio	Ohio	Usher	Son
1940	John Hamilton	30	Middlesex-County, Massachusetts	Massachusetts	Lumper	Head
1940	John S. Hamilton	40	Coles-County, Illinois	Illinois	Farming	Son
1940	John H. Hamilton	30	Broome-County, New York	New York	Laborer	Head
1930	John H. Hamilton		Rockingham, New Hampshire	Scotland	Carpenter	Head
1940	John O. Hamilton	82	Fremont-County, Colorado	Iowa	—	Head
1940	John D. Hamilton	47	Pierce-County, Washington	West Virginia	Owner & Mgr	Head
1920	John Hamilton		Westmoreland, Pennsylvania	Pennsylvania	Farmer	Head
1910	John F Hamilton		Marion, West Virginia	West Virginia	Retail Merchant	Head
1940	John H Hamilton	42	Philadelphia-County, Pennsylvania	Pennsylvania	Real Estate	Head
1940	John Hamilton	36	Caroline-County, Maryland	Maryland	Farm Hand	Head
1940	John D Hamilton	58	Harlan-County, Nebraska	Iowa	Dentist	Head
1940	John A Hamilton	67	Lewis-County, Kentucky	Kentucky	Farmer	Head
1940	John E. Hamilton	56	Adams-County, Illinois	Indiana	Farmer	Head
1920	John Hamilton		Jefferson, Ohio	Ireland	Laborer	Head
1920	John H. Hamilton		Washington, Pennsylvania	Pennsylvania	Farmer	Head

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About John Hamilton US Census Records & Model Tree

We've indexed 16407 free, proprietary US Census records for John Hamilton across 1900–1950, covering 50 states, DC, and 1 territory: 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, 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 16407 US Census records for John Hamilton, from 1900 to 1950, across 50 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 Hamilton'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 Hamilton 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 Hamilton records from the 1900 through 1950 US Federal Census, across 50 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 Hamilton US Census Records

Alice Hamilton Anna Hamilton Annie Hamilton Charles Hamilton Edward Hamilton Elizabeth Hamilton Frank Hamilton George Hamilton Harry Hamilton Helen Hamilton Henry Hamilton James Hamilton Joseph Hamilton Margaret Hamilton Mary Hamilton Robert Hamilton Ruth Hamilton Sarah Hamilton Thomas Hamilton William Hamilton

All Hamilton census records →

Browse More Surnames

Haggerty Hahn Haines Hale Haley Hall Hammond Hampton Hancock Hand Hanley Hanna

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