CS
Carl Swanson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Illinois
Our Model Tree links this Carl Swanson across the 1920, 1930 and 1940 US Censuses in Knox-County, Illinois (XGBoost, ~Confirmed), with identified parents Hulda & Fred — first a head (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Illinois |
| Surname | Swanson |
| Given Name | Carl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Ontario Twp |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | Ontario Twp |
| Est. Birth Year | ~1900 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Carl | Age | Birth yr |
|---|---|---|---|---|
| Carl Swanson | Head | — | 40 | ~1900 |
| Bertha Swanson | Spouse | — | 39 | ~1901 |
| Una Swanson | Daughter | — | 7 | ~1933 |
Census Appearances
1920
Knox, Illinois
Son, age 20
Knox, Illinois · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Carl H. |
| 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 | Machinist |
| Industry | R Road Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Knox, Illinois
Other, age 31
Knox, Illinois · implied b. ~1899 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Carl O |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| Year of Immigration | 1906 |
| Age at First Marriage | 26 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Car Carpenter |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Knox-County, Illinois
Head, age 40
Knox-County, Illinois · implied b. ~1900 — 3 household members
| Surname | Swanson |
| Given Name | Carl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Ontario Twp |
| 1935 Residence (County) | Knox |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| 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 Carl Swanson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Hulda Swanson (~0.92 confidence) and father Fred Swanson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Hulda Swanson
b. ~1868
Source mother
● Household
· direct · ~0.92
Father
Fred Swanson
b. ~1873
Source father
● Household
· direct · ~0.92
This person
Anchor record
Carl Swanson
Head · 1940 · age 40 · b. ~1900 · 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 — Knox-County, Illinois
Open full size
1940 US Federal Census — Knox-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00827-00246)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lester Edwards | 24 | Son | Laborer | Illinois |
| 42 | Henry Welch | 69 | Head | Farmer | Illinois |
| 43 | Lucy Welch | 64 | Wife | — | Illinois |
| 44 | Florence Welch | 33 | Daughter | Post Mistress | Illinois |
| 45 | Henry O'Brien | 57 | Hired Hand | Laborer | Illinois |
| 46 | Carl Swanson THIS PERSON | 40 | Head | Farmer | Illinois |
| 47 | Bertha Swanson | 39 | Wife | — | Illinois |
| 48 | Una Swanson | 7 | Daughter | — | Illinois |
| 49 | Edd Rosenberg | 63 | Head | Farmer | Illinois |
| 50 | Helga Rosenberg | 52 | Wife | — | Sweden |
| 51 | Donalene Rosenberg | 28 | Daughter | Teacher | Illinois |
| 52 | Betty Ann Rosenberg | 15 | Daughter | — | Illinois |
| 53 | James Stewart | 32 | Hired Hand | Laborer | Illinois |
| 54 | James O'Connor | 61 | Head | Farmer | Kansas |
| 55 | Mable O'Connor | 52 | Wife | — | Illinois |
| 56 | Katherine O'Connor | 25 | Daughter | — | Illinois |
| 57 | Peggy O'Connor | 13 | Daughter | — | Illinois |
| 58 | Billy O'Connor | 10 | Son | — | Illinois |
| 59 | Martin Olson | 30 | Head | Farmer | Illinois |
| 60 | Anna Olson | 69 | Mother | — | Illinois |
| 61 | Seigfred Eden | 30 | Hired Hand | Laborer | Illinois |
| 62 | Melvin Olson | 44 | Head | Farmer | Illinois |
| 63 | Florence Olson | 43 | Wife | — | Illinois |
| 64 | Lillian Olson | 16 | Daughter | — | Illinois |
| 65 | Leonard Olson | 13 | Son | — | Illinois |
| 66 | Lula May Olson | 7 | Daughter | — | Illinois |
| 67 | Bald Wadsider | 35 | Hired Hand | Laborer | Illinois |
| 68 | Frank Rosenberg | 67 | Head | — | Illinois |
| 69 | Billie Rosenberg | 65 | Wife | — | Illinois |
| 70 | Carl Nelson | 44 | Son-in-law | Farmer | Sweden |
| 71 | Laura Nelson | 41 | Daughter | — | Illinois |
| 72 | Jeanette Nelson | 9 | Granddaughter | — | Illinois |
| 73 | Dale Murray | 19 | Hired Hand | Laborer | Illinois |
| 74 | Gust Nelson | 42 | Head | Farmer | Sweden |
| 75 | Carrie Nelson | 49 | Wife | — | Illinois |
| 76 | Gus Johnson | 19 | Hired Hand | Laborer | Illinois |
| 77 | Walt Reynolds | 35 | Head | Farmer | Illinois |
| 78 | Adelaide Reynolds | 32 | Wife | — | Illinois |
| 79 | Valerie Reynolds | 8 | Daughter | — | Illinois |
| 80 | Marlyn Reynolds | 4 | Son | — | Illinois |
Pedigree Summary
Carl
Gen 1 · 2 parents
~0.92
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)