How many William Simpson census records do you have?

We have 11899 US Census records for William Simpson, from 1900 to 1950, across 50 states, DC, and 1 territory.

What's in a William Simpson 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 Simpson'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 Simpson census records free?

Yes. All William Simpson 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 Simpson?

We have William Simpson 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 William Simpson 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 Simpson?

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 Simpson — US Census Records & Model Tree

We found 11899 free census records for William Simpson across 6 census years (1900–1950), in 50 states, DC, and 1 territory and 1800 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

William Simpson 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 11899 records for William Simpson US Census, ranked by Model Tree richness

No records match your filters.

Year	Name	Age	Location	Birthplace	Occupation	Relation
1930	William Simpson		Anne Arundel, Maryland	Maryland	—	Son
1930	William Simpson		Leslie, Kentucky	Kentucky	Laborer	Son
1940	William (Ab) Simpson	21	Jefferson-County, Ohio	Ohio	—	Son
1910	William T Simpson		York, South Carolina	South Carolina	Laborer	Son
1930	William Simpson		New York, New York	New York	Clerk	Son
1940	William Simpson	22	Washington-County, Vermont	Vermont	Bank Grinder	Son
1930	William Simpson		Philadelphia, Pennsylvania	Pennsylvania	—	Son
1930	William V. Simpson		Ramsey, Minnesota	Minnesota	—	Son
1920	William Simpson		Davidson, Tennessee	Tennessee	Commercial Traveler	Son
1930	William Simpson		Tuscaloosa, Alabama	Alabama	Farmer	Head
1930	William Simpson		Jones, Mississippi	Mississippi	Loader	Son
1930	William Simpson		Nowata, Oklahoma	Kansas	Merchant	Head
1940	William Simpson	39	Wilson-County, North Carolina	North Carolina	Farmer	Head
1940	William Jr Simpson	42	Bronx-County, New York	New York	Dorman	Son
1930	William J. Simpson		Franklin, Ohio	Ohio	Electrician	Son
1930	William P. Simpson		Kay, Oklahoma	Kansas	Laborer	Son
1910	William J Simpson		Fulton, Georgia	Georgia	Farming	Head
1940	William J. Simpson	61	Tipton-County, Tennessee	Mississippi	—	Head
1920	William Simpson		Union, North Carolina	North Carolina	Farmer	Head
1940	William M. Simpson	57	Anne-Arundel-County, Maryland	North Carolina	Supervisor	Head
1920	William Simpson		Cumberland, North Carolina	North Carolina	Farmer	Head
1910	William W Simpson		Riley, Kansas	New York	Farmer	Head
1930	William S Simpson		Chester, South Carolina	South Carolina	Secretary	Head
1930	William S. Simpson		Polk, Iowa	Iowa	Farmer	Head
1930	William E Simpson		Haskell, Oklahoma	Arkansas	Track Foreman	Head
1940	William J. Simpson	55	Pueblo-County, Colorado	Missouri	Electrician	Head
1930	William Simpson		St Francois, Missouri	Missouri	Machinist	Head
1930	William G. Simpson		Trego, Kansas	Indiana	Farmer	Head
1940	William Simpson	72	Columbiana-County, Ohio	England	—	Head
1920	William M Simpson		Pasquotank, North Carolina	North Carolina	Farmer	Head

Load More William Simpson Census Records

About William Simpson US Census Records & Model Tree

We've indexed 11899 free, proprietary US Census records for William Simpson 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 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 11899 US Census records for William Simpson, from 1900 to 1950, across 50 states, DC, and 1 territory.
: 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 Simpson'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 Simpson 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 Simpson 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 Simpson US Census Records

Alice Simpson Annie Simpson Charles Simpson Elizabeth Simpson Frank Simpson George Simpson James Simpson John Simpson Margaret Simpson Mary Simpson Robert Simpson Thomas Simpson

All Simpson census records →

Browse More Surnames

Short Silva Simmons Simms Simon Simons Sims Skinner Slater Sloan Small Smith

← Back to US Census Records