How many William Kirk census records do you have?

We have 3445 US Census records for William Kirk, from 1900 to 1950, across 50 states and DC.

What's in a William Kirk census record?

You'll see William'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 William Kirk'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 William Kirk census records free?

Yes. All William Kirk 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 William Kirk?

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

How do I find William Kirk 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 William Kirk?

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.

William Kirk — US Census Records & Model Tree

We found 3445 free census records for William Kirk across 6 census years (1900–1950), in 50 states and DC and 926 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

William Kirk Census Records by State & County

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Showing of 3445 records for William Kirk US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1920	William Kirk		St Mary, Louisiana	Louisiana	Employee	Son
1920	William H Kirk		Juniata, Pennsylvania	Pennsylvania	—	Son
1940	William Kirk	45	Lee-County, Illinois	Illinois	Farmer	Head
1940	William H. Jr. Kirk	24	Clinton-County, Missouri	Missouri	—	Son
1930	William B. Kirk		Franklin, Georgia	Georgia	Farming	Head
1940	William D. Kirk	62	Lancaster-County, South Carolina	South Carolina	Farmer	Head
1930	William J. Kirk		Wilson, Kansas	Missouri	Barber	Head
1940	William Kirk	67	Union-County, New Jersey	England	—	Head
1940	William W. Kirk	78	Montgomery-County, Illinois	Illinois	—	Head
1940	William O. Kirk	60	Frederick-County, Virginia	Virginia	Laborer	Head
1940	William V. Kirk	25	Tipton-County, Tennessee	Tennessee	Farmer	Head
1930	William T. Kirk		Lee, Virginia	Virginia	Farmer	Head
1940	William H. Kirk	52	Clinton-County, Missouri	Missouri	Farmer	Head
1910	William F. Kirk		Columbiana, Ohio	Ohio	Insurance	Head
1930	William C. Kirk		Multnomah, Oregon	Mississippi	Laborer	Head
1940	William J. Kirk	57	Lancaster-County, Pennsylvania	Pennsylvania	Farmer	Head
1940	William D. Kirk	44	Washington-County, Arkansas	Arkansas	Farmer	Head
1940	William E Kirk	75	Jefferson-County, Ohio	Ohio	Farmer	Head
1930	William P Kirk		Andrew, Missouri	Missouri	—	Son
1910	William Kirk		Pepin, Wisconsin	Wisconsin	—	Son
1930	William Kirk		Allegheny, Pennsylvania	Pennsylvania	None	Son
1920	William Kirk		Allegheny, Pennsylvania	Pennsylvania	—	Son
1940	William Kirk	24	Blount-County, Tennessee	Alabama	Aluminum Mfg.	Son
1940	William J. Kirk	15	Clinton-County, Indiana	Indiana	—	Son
1910	William J Kirk		Grant, Wisconsin	Wisconsin	Driller	Head
1930	William J Kirk		Montgomery, Illinois	Illinois	Bee-Keeper	Son
1920	William H Kirk		Montgomery, Pennsylvania	Pennsylvania	Bookkeeper	Head
1910	William T. Kirk		Sutter, California	California	Laborer	Son
1910	William M Kirk		Cabarrus, North Carolina	North Carolina	Slasher Man	Head
1930	William E. Kirk		Cortland, New York	New York	Farmer	Head

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About William Kirk US Census Records & Model Tree

We've indexed 3445 free, proprietary US Census records for William Kirk across 1900–1950, covering 50 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, 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 William 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 3445 US Census records for William Kirk, from 1900 to 1950, across 50 states and DC.
: You'll see William'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 William Kirk'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 William Kirk 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 William Kirk records from the 1900 through 1950 US Federal Census, across 50 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.