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William Carlson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this William Carlson across the 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | South Moline Twp. |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | South Moline Twp |
| Est. Birth Year | ~1926 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Ella Carlson | Daughter | — | 19 | ~1921 |
| William Carlson | Son | — | 14 | ~1926 |
| Ruth Carlson | Daughter | — | 18 | ~1922 |
| Dale Carlson | Son | — | 7 | ~1933 |
| John Carlson | Head | — | 64 | ~1876 |
| Eleonora Carlson | Spouse | — | 51 | ~1889 |
| Danny Carlson | Son | — | 12 | ~1928 |
| Robert Carlson | Son | — | 21 | ~1919 |
Census Appearances
1930
Rock Island, …
Son, age 4
Rock Island, Illinois · implied b. ~1926 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Son, age 14
Rock-Island-County, Illinois · implied b. ~1926 — 8 household members
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | South Moline Twp. |
| 1935 Residence (County) | Rock Island |
| Class of Worker | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links William Carlson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Carlson
Son · 1940 · age 14 · b. ~1926 · Illinois
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Sibling
Dale Carlson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Carlson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ella Carlson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Carlson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Danny Carlson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00877-00624)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Phyllis Blitgen | 6 | daughter | — | Minnesota |
| 2 | Lucille Blitgen | 5 | daughter | — | Minnesota |
| 3 | Anthony Vanchau | 53 | Head | Farmer | Lithuania |
| 4 | Amelia Vanchau | 52 | Wife | — | Lithuania |
| 5 | Albert Vanchau | 25 | Son | Laborer | Illinois |
| 6 | John Carlson | 64 | Head | Farmer | Sweden |
| 7 | Eleonora Carlson | 51 | Wife | — | Illinois |
| 8 | Robert Carlson | 21 | Son | Farm Hand | Illinois |
| 9 | Ella Carlson | 19 | Daughter | Housework | Illinois |
| 10 | Ruth Carlson | 18 | Daughter | — | Illinois |
| 11 | William Carlson THIS PERSON | 14 | Son | — | Illinois |
| 12 | Danny Carlson | 12 | Son | — | Illinois |
| 13 | Dale Carlson | 7 | Son | — | Illinois |
| 14 | Leslie Willard | 43 | Head | Farmer | Illinois |
| 15 | Pearl Willard | 33 | Wife | — | Illinois |
| 16 | Shirley Willard | 15 | Daughter | — | Illinois |
| 17 | Evelyn Willard | 13 | Daughter | — | Illinois |
| 18 | Barbara Willard | 9 | Daughter | — | Illinois |
| 19 | David Willard | 1 | Son | — | Illinois |
| 20 | Fred Bevan | 17 | Lodger | New Worker | Iowa |
| 21 | Willard Lanning | 27 | Head | Laborer | Illinois |
| 22 | Bernice Lanning | 17 | Wife | — | Illinois |
| 23 | Delford Werning | 26 | Head | Laborer | Illinois |
| 24 | Clarice Werning | 21 | Wife | Beauty Operator | Illinois |
| 25 | Gerald Shirley | 29 | Head | Laborer | Illinois |
| 26 | Della Shirley | 28 | Wife | Cashier | Illinois |
| 27 | Ruth Keel | 24 | Lodger | Maid | Illinois |
| 28 | Albert Coussens | 37 | Head | Laborer | Belgium |
| 29 | Elizabeth Coussens | 36 | Wife | — | Belgium |
| 30 | Lawrence Coussens | 13 | Son | — | Illinois |
| 31 | Julius Tanghe | 64 | Head | Laborer | Belgium |
| 32 | Theresa Tanghe | 58 | Wife | — | Belgium |
| 33 | Duane Whitlow | 28 | Head | Laborer | Iowa |
| 34 | Ester Whitlow | 23 | Wife | — | Iowa |
| 35 | Theodore Hamston | 46 | Head | Laborer | Iowa |
| 36 | Madaline Hamston | 26 | Wife | — | Iowa |
| 37 | Phyllis Hamston | 7 | Daughter | — | Iowa |
| 38 | Thelma Hamston | 2 | Daughter | — | Iowa |
| 39 | John Mckenna | 32 | Head | Laborer | Illinois |
| 40 | Dorothy Mckenna | 23 | Wife | — | Illinois |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)