WC
William Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this William Carlson across the 1920, 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Edith — first a head (b.~1899), then head of a 5-person household.
Age 41
b. ~1899
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Lockport City |
| 1935 Residence (County) | Will |
| Additional Details | |
| Occupation | Switchman |
| Industry | Steam Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1680 |
| Highest Grade | Hs 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Switchman |
| Township / Ward | Lockport City |
| Est. Birth Year | ~1899 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Irma Carlson | Spouse | — | 41 | ~1899 |
| Howard Carlson | Son | — | 19 | ~1921 |
| Robert Carlson | Son | — | 14 | ~1926 |
| William Carlson | Head | — | 41 | ~1899 |
| Earl Carlson | Son | — | 18 | ~1922 |
Census Appearances
1920
Will, Illinois
Son, age 20
Will, Illinois · implied b. ~1900 — 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 | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Clerk |
| Industry | Standard Oil |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Head, age 31
Will, Illinois · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| Year of Immigration | 1906 |
| Age at First Marriage | 21 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Switchman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Head, age 41
Will-County, Illinois · implied b. ~1899 — 5 household members
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Lockport City |
| 1935 Residence (County) | Will |
| Occupation | Switchman |
| Industry | Steam Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1680 |
| Highest Grade | Hs 8 |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Carlson (~0.92 confidence) and mother Edith Carlson (~0.60 confidence) and mother Hulda Carlson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.81
Father
Charles Carlson
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Edith Carlson
b. ~1892
Source mother
● Household
· direct · ~0.6
Mother
Hulda Carlson
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Carlson
Head · 1940 · age 41 · b. ~1899 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00909-00335)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Therese Glavin | 14 | Daughter | — | Illinois |
| 42 | William Glavin | 11 | Son | — | Illinois |
| 43 | Thomas Glavin | 9 | Son | — | Illinois |
| 44 | Margaret Glavin | 5 | Daughter | — | Illinois |
| 45 | Michael Keough | 59 | Head | Boiler Maker | Illinois |
| 46 | Katherine Keough | 57 | Wife | — | Illinois |
| 47 | David Eichhorn | 28 | Head | Stillman | Illinois |
| 48 | Ruth Eichhorn | 25 | Wife | — | Illinois |
| 49 | Rachael Eichhorn | 7 | Daughter | — | Illinois |
| 50 | Janet Eichhorn | 3 | Daughter | — | Illinois |
| 51 | George Smith Peters | 24 | Lodger | Laborer | Illinois |
| 52 | Ferdinand Blessing | 23 | Head | Laborer | Illinois |
| 53 | Shirley Blessing | 20 | Wife | Bookkeeper | Illinois |
| 54 | Frank Blessing | 23 | Brother | Blacksmith Helper | Illinois |
| 55 | Ernest Heckman | 52 | Head | Fireman | England |
| 56 | John H. Heckman | 21 | Son | Helper | Illinois |
| 57 | Donald Heckman | 18 | Son | — | Illinois |
| 58 | Evelyn Heckman | 15 | Daughter | — | Illinois |
| 59 | Elizabeth Deem | 76 | Mother-in-law | — | Pennsylvania |
| 61 | Walter Geist | 28 | Head | Printer | Illinois |
| 62 | Dorothy Geist | 25 | Wife | — | Ohio |
| 63 | Bradley Geist | 4 | Son | — | Illinois |
| 64 | Ferne Geist | 2 | Daughter | — | Illinois |
| 66 | Albert Burton | 49 | Head | Laborer | Illinois |
| 67 | Mary Burton | 51 | Wife | — | Rhode Island |
| 68 | George Fair | 36 | Head | Foreman | Illinois |
| 69 | Inez Fair | 32 | Wife | Typist | Iowa |
| 70 | William Carlson THIS PERSON | 41 | Head | Switchman | Illinois |
| 71 | Irma Carlson | 41 | Wife | — | Illinois |
| 72 | Howard Carlson | 19 | Son | New Worker | Illinois |
| 73 | Earl Carlson | 18 | Son | — | Illinois |
| 74 | Robert Carlson | 14 | Son | — | Illinois |
| 75 | James M. Nelson | 47 | Head | Loader Man | Iowa |
| 76 | Elizabeth Nelson | 45 | Wife | — | Kentucky |
| 77 | Edith Nelson | 16 | Daughter | Maid | Indiana |
| 78 | James Nelson | 11 | Son | — | Illinois |
| 79 | Marie Nelson | 7 | Daughter | — | Illinois |
| 80 | Emma Nelson | 5 | Daughter | — | Illinois |
Pedigree Summary
William
Gen 1 · 3 parents
~0.81
Max depth 4 (1900–1950 window)
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)