How many John Mcmillan census records do you have?

We have 3176 US Census records for John Mcmillan, from 1900 to 1950, across 49 states, DC, and 1 territory.

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

Yes. All John Mcmillan 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 Mcmillan?

We have John Mcmillan 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 Mcmillan 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 Mcmillan?

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 Mcmillan — US Census Records & Model Tree

We found 3176 free census records for John Mcmillan across 6 census years (1900–1950), in 49 states, DC, and 1 territory and 919 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

John Mcmillan Census Records by State & County

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Showing of 3176 records for John Mcmillan US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	John Mcmillan	38	Cumberland-County, North Carolina	North Carolina	Laborer	Head
1920	John Mcmillan		Sumter, Alabama	Alabama	Laborer	Son
1920	John Mcmillan		Mercer, New Jersey	Scotland	Tool Maker	Son
1920	John Mcmillan		Kings, New York	Scotland	Machinist	Son
1930	John Mcmillan		Attala, Mississippi	Mississippi	Laborer	Son
1940	John Mcmillan	35	Yavapai-County, Arizona	Arizona	Hoisting Engine	Head
1940	John Jr. Mcmillan	22	Jones-County, Mississippi	Mississippi	Farmer	Head
1930	John H. Mcmillan		Rooks, Kansas	Kansas	—	Son
1930	John Mcmillan		Wilcox, Alabama	Alabama	Farmer	Head
1940	John C. @ Mcmillan	49	Jones-County, Mississippi	Mississippi	Farmer	Head
1940	John Mcmillan	31	Wilcox-County, Georgia	Georgia	Farmer	Head
1920	John L. Mcmillan		Alleghany, North Carolina	North Carolina	Farmer	Head
1940	John Mcmillan	58	Newton-County, Indiana	Ohio	Farmer	Head
1920	John Mcmillan		Kane, Illinois	New York	Merchant	Head
1940	John Mcmillan	66	Chippewa-County, Michigan	Michigan	—	Head
1940	John Mcmillan	74	Shelby-County, Illinois	Ohio	—	Head
1940	John D. Mcmillan	15	Scotland-County, North Carolina	North Carolina	S	Son
1930	John H Mcmillan		Irwin, Georgia	Georgia	Farmer	Son
1940	John Mcmillan	38	Mercer-County, New Jersey	South Carolina	Government Highway Work	Head
1940	John R. Jr. Mcmillan	17	Genesee-County, Michigan	Michigan	—	Son
1910	John T Mcmillan		Gwinnett, Georgia	Georgia	Farmer	Head
1940	John Mcmillan	13	Robeson-County, North Carolina	North Carolina	—	Son
1900	John Mcmillan	52	Saginaw, Michigan	Canada	Farmer	Head
1910	John Mcmillan		Cumberland, North Carolina	North Carolina	Farm Laborer	Son
1940	John J Mcmillan	49	Orangeburg-County, South Carolina	South Carolina	Farmer	Head
1940	John Jr. Mcmillan	16	Wilcox-County, Alabama	Alabama	Farm Worker	Son
1940	John Mcmillan	17	Cook-County, Illinois	Illinois	New Worker	Son
1940	John Mcmillan	40	Robeson-County, North Carolina	North Carolina	Laborer	Head
1910	John M Mcmillan		Cumberland, North Carolina	North Carolina	Farmer	Head
1920	John Mcmillan		Bladen, North Carolina	North Carolina	Farmer	Head

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About John Mcmillan US Census Records & Model Tree

We've indexed 3176 free, proprietary US Census records for John Mcmillan across 1900–1950, covering 49 states, DC, and 1 territory: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, 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 3176 US Census records for John Mcmillan, 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 Mcmillan'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 Mcmillan 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 Mcmillan 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.

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