AC
Arthur Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Illinois
Our Model Tree links this Arthur Carlson across the 1920, 1930 and 1940 US Censuses in Knox-County, Illinois (XGBoost, ~Confirmed), with identified parents Alfred & Lena — first a head (b.~1888), then head of a 4-person household.
Age 52
b. ~1888
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Illinois |
| Surname | Carlson |
| Given Name | Arthur S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Henderson Twp. |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 75 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farming |
| Township / Ward | Henderson Twp |
| Est. Birth Year | ~1888 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Arthur | Age | Birth yr |
|---|---|---|---|---|
| Elsie Carlson | Spouse | — | 49 | ~1891 |
| Mary Carlson | Daughter | — | 21 | ~1919 |
| Violet Carlson | Daughter | — | 19 | ~1921 |
| Arthur Carlson | Head | — | 52 | ~1888 |
Census Appearances
1920
Knox, Illinois
Son, age 32
Knox, Illinois · implied b. ~1888 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farming |
| Industry | at Home |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Knox, Illinois
Head, age 43
Knox, Illinois · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Arthur S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 30 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Knox-County, Illinois
Head, age 52
Knox-County, Illinois · implied b. ~1888 — 4 household members
| Surname | Carlson |
| Given Name | Arthur S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Henderson Twp. |
| 1935 Residence (County) | Knox |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 75 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 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 Arthur Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alfred Carlson (~0.92 confidence) and mother Lena Carlson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alfred Carlson
b. ~1840
Source father
● Household
· direct · ~0.92
Mother
Lena Carlson
b. ~1852
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Arthur Carlson
Head · 1940 · age 52 · b. ~1888 · 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-t0627-00827-00034)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Peterson | 72 | Husband | — | Sweden |
| 2 | Laurence Peterson | 12 | Son | — | Illinois |
| 3 | Elias Wadhms | Wadhams | 79 | Father | — | Sweden |
| 4 | W. R. Kempur | Kemper | 43 | Head | Farming | Illinois |
| 5 | Verna Kempur | Kemper | 40 | Wife | — | Illinois |
| 6 | Mary Kempur | Kemper | 20 | Daughter | — | Illinois |
| 7 | Lyle Kempur | Kemper | 16 | Son | — | Illinois |
| 8 | Belva Kempur | Kemper | 14 | Daughter | — | Illinois |
| 9 | Robert Kempur | Kemper | 4 | Son | — | Illinois |
| 10 | Edward Humes | 62 | Head | Farming | Illinois |
| 11 | Hattie Humes | 51 | Wife | — | Illinois |
| 12 | Ruby Swanson | 28 | Daughter | — | Illinois |
| 13 | Carl Swanson | 32 | Son-in-law | Farm Hand | Sweden |
| 14 | Mary Ann Swanson | 2 | Grand-daughter | — | Illinois |
| 15 | Dorothy Humes | 23 | Daughter | — | Illinois |
| 16 | Dale Humes | 14 | Son | — | Illinois |
| 17 | Geneva Humes | 12 | Daughter | — | Illinois |
| 18 | Stanley Campbell | 47 | Head | Farming | Illinois |
| 19 | Francis Campbell | 45 | Wife | — | Missouri |
| 20 | Frank Hult | 58 | Landlord | — | Illinois |
| 21 | Fred Rosine | 38 | Head | Farming | Illinois |
| 22 | Emma Nelson | 82 | Head | — | Sweden |
| 23 | Edward Nelson | 52 | Son | Farming | Illinois |
| 24 | Rosa Nelson | 46 | Daughter | — | Illinois |
| 25 | Frank S. Henderson | 48 | Head | Farming | Sweden |
| 26 | Ray Henderson | 21 | Son | — | Nebraska |
| 27 | James Henderson | 15 | Son | — | Nebraska |
| 28 | Lorraine Henderson | 12 | Daughter | — | Nebraska |
| 29 | Jack Henderson | 9 | Son | — | Nebraska |
| 30 | Ingegard Widstrom | 32 | Sister-in-law | — | Sweden |
| 31 | Elmer Johnson | 48 | Head | Farming | Illinois |
| 32 | Carolina Johnson | 82 | Mother | — | Illinois |
| 33 | Arthur S. Carlson THIS PERSON | 52 | Head | Farming | Illinois |
| 34 | Elsie Carlson | 49 | Wife | — | Illinois |
| 35 | Violet Ab Carlson | 19 | Daughter | Housekeeper | Illinois |
| 36 | Mary Ab Carlson | 21 | Daughter | — | Illinois |
| 37 | Albert Carlson | 66 | Head | — | Illinois |
| 38 | John C. Nelson | 57 | Head | Farming | Illinois |
| 39 | Selma Nelson | 53 | Wife | — | Illinois |
| 40 | Vincent Ab Nelson | 20 | Son | — | Illinois |
Pedigree Summary
Arthur
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)