AL
Arthur Larson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Arthur Larson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Anders & Andrew — first a head (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larson |
| Given Name | Arthur O |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Machine shop foreman |
| Industry | Machine shop farm implements |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Machine Shop Foreman |
| Township / Ward | Garden Homes |
| 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 Arthur | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Larson | Daughter | — | 7 | ~1933 |
| Jenna Larson | Spouse | — | 33 | ~1907 |
| Arthur Larson | Head | — | 40 | ~1900 |
Census Appearances
1920
Cook, Illinois
Son, age 19
Cook, Illinois · implied b. ~1901 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Sweden |
| Year of Immigration | 1901 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Apprentice |
| Industry | Machinist |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Year of Naturalization | 1906 |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Son, age 30
Cook, Illinois · implied b. ~1900 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Arthur E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Machinist |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Veteran | No |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Head, age 40
Cook-County, Illinois · implied b. ~1900 — 3 household members
| Surname | Larson |
| Given Name | Arthur O |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Machine shop foreman |
| Industry | Machine shop farm implements |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Larson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Anders Larson (~0.92 confidence) and father Andrew Larsen (~0.92 confidence) and mother Ammy Larson (~0.92 confidence) and mother Emma Larsen (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Anders Larson
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Andrew Larsen
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Ammy Larson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Emma Larsen
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Arthur Larson
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00790-00292)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jacob O Smith | 53 | Head | Laborer | Netherlands |
| 42 | Grace Smith | 53 | Wife | — | Illinois |
| 43 | Herman Miedema | 20 | Step-son | Laborer | Illinois |
| 44 | Samuel Miedema | 19 | Step-son | Farm Laborer | Illinois |
| 45 | Louis Miedema | 16 | Step-son | New Worker | Illinois |
| 46 | Henry Miedema | 14 | Step-son | — | Illinois |
| 47 | Fred O Potter | 49 | Head | Building Contractor | Minnesota |
| 48 | Lillian Potter | 45 | Wife | — | Minnesota |
| 49 | Lorraine Potter | 12 | Daughter | — | Illinois |
| 50 | Eric O Foster | 41 | Head | Carpenter | Sweden |
| 51 | Cecila Foster | 36 | Wife | — | Illinois |
| 52 | Charlene Foster | 11 | Daughter | — | Illinois |
| 53 | Richard Foster | 4 | Son | — | Illinois |
| 54 | Anna Peterson | 74 | Mother-in-law | — | Sweden |
| 55 | Arthur O Larson THIS PERSON | 40 | Head | Machine Shop Foreman | Sweden |
| 56 | Jenna Larson | 33 | Wife | — | Illinois |
| 57 | Dorothy Larson | 7 | Daughter | — | Illinois |
| 58 | Thys Dykstra | 47 | Head | Timekeeper | Illinois |
| 59 | Margaret O Dykstra | 46 | Wife | — | Indiana |
| 60 | Allan Dykstra | 15 | Son | — | Minnesota |
| 61 | Frank O Lenihan | 42 | Head | Stationary Fireman | So. Dakota |
| 62 | Louise Lenihan | 35 | Wife | — | Illinois |
| 63 | Marilyn Lenihan | 6 | Daughter | — | Illinois |
| 64 | Joseph Petro | 63 | Head | Car (R.R.) Maintenance | Czechoslovakia |
| 65 | Barbara Petro | 56 | Wife | — | Czechoslovakia |
| 66 | Frank O Petro | 33 | Son | Painter | Pennsylvania |
| 67 | Anthony Petro | 31 | Son | Mailing Clerk | Pennsylvania |
| 68 | Victor Petro | 26 | Son | Clerk | Illinois |
| 69 | Margaret Petro | 22 | Daughter | Clerk - Order Checker | Illinois |
| 70 | Johanna Petro | 19 | Daughter | Clerk - Order Checker | Illinois |
| 71 | Stephen Petro | 17 | Son | — | Illinois |
| 72 | Anna Petro | 14 | Daughter | — | Illinois |
| 73 | Andrew Petro | 12 | Son | — | Illinois |
| 74 | Samuel Boerema | 49 | Head | Farmer | Netherlands |
| 75 | Susan O Boerema | 49 | Wife | — | Netherlands |
| 76 | Harriett Boerema | 20 | Daughter | Stenographer | Illinois |
| 77 | Theodore Boerema | 19 | Son | Farm Laborer | Illinois |
| 78 | Mildred Boerema | 17 | Daughter | — | Illinois |
| 79 | Melvin Boerema | 13 | Son | — | Illinois |
| 80 | Jessie Anema | 74 | Mother-in-law | — | Netherlands |
Pedigree Summary
Arthur
Gen 1 · 4 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)