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Arthur Foster — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Arthur Foster across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Claude & Lila — first a son (b.~1920), then head of a 7-person household.
Age 20
b. ~1920
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Foster |
| Given Name | Arthur J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 0 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1920 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Arthur | Age | Birth yr |
|---|---|---|---|---|
| Arthur Foster | Son | — | 20 | ~1920 |
| Helen Foster | Daughter | — | 31 | ~1909 |
| Claude Foster | Son | — | 28 | ~1912 |
| Ruth Foster | Daughter | — | 26 | ~1914 |
| Lila Foster | Spouse | — | 62 | ~1878 |
| Claude Foster | Head | — | 64 | ~1876 |
| R Foster | Son | — | 23 | ~1917 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Arthur |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 10
Cook, Illinois · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Arthur |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 20
Cook-County, Illinois · implied b. ~1920 — 7 household members
| Surname | Foster |
| Given Name | Arthur J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 0 |
| 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 Arthur Foster across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Claude Foster (~0.92 confidence) and mother Lila Foster (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Claude Foster
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Lila Foster
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Arthur Foster
Son · 1940 · age 20 · b. ~1920 · Illinois
★ You are viewing this record
Sibling
Helen Foster
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Claude Foster
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
R Foster
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Foster
Sibling · 1940 · age 26
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 — 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-t0627-00988-00381)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Szymanski | 93 | Father-in-law | — | Illinois |
| 42 | Frank Szymanski | 63 | Brother-in-law | Moulder'S Helper | Poland |
| 43 | Michael Mchugh | 59 | Head | Bench Hand | England |
| 44 | Honora T. Mchugh | 55 | Wife | Janitress | Irish Free State |
| 45 | Martin W. Mchugh | 16 | Son | — | Illinois |
| 46 | Carl W. Kelch | 63 | Head | Laborer | Germany |
| 47 | Anna J. Kelch | 65 | Wife | — | Germany |
| 48 | Joseph Wauters | 43 | Head | Marble Cutter | Belgium |
| 49 | Alphonsine Wauters | 40 | Wife | — | Belgium |
| 50 | Pascal Wauters | 20 | Son | Addressograph Operator | Belgium |
| 51 | Josephine Wauters | 12 | Daughter | — | Illinois |
| 52 | Russ Henderson | 59 | Head | Janitor | Oklahoma |
| 53 | Flora Henderson | 49 | Wife | — | Ohio |
| 54 | Reinhardt Mangke | 51 | Head | Canvas Sewer | Illinois |
| 55 | Mamie Mangke | 45 | Wife | — | Illinois |
| 56 | John Ivancic | 11 | Nephew | — | Illinois |
| 57 | Paul Gorski | 50 | Head | Crane Operator | Poland |
| 58 | Bernice Gorski | 36 | Wife | — | Poland |
| 59 | George Gorski | 25 | Son | Packer | Pennsylvania |
| 60 | Claude Foster | 64 | Head | Dock Superintendent | Illinois |
| 61 | Lila Foster | 62 | Wife | — | Illinois |
| 62 | Helen M. Foster | 31 | Daughter | Bookkeeper | Illinois |
| 63 | Claude J. Foster | 28 | Son | Audit Clerk | Illinois |
| 64 | Ruth G. Foster | 26 | Daughter | Stenographer | Illinois |
| 65 | R. Richard Foster | 23 | Son | Steel Salesman | Illinois |
| 66 | Arthur J. Foster THIS PERSON | 20 | Son | — | Illinois |
| 67 | Samuel Yelin | 30 | Head | Attorney | Illinois |
| 68 | Matilda Yelin | 28 | Wife | Attorney | Illinois |
| 69 | Ronald N. Yelin | 2 | Son | — | Illinois |
| 70 | Henry O. Sobieck | 32 | Head | Dealer | Michigan |
| 71 | Wanita Sobieck | 26 | Wife | — | Michigan |
| 72 | Henry Jr. Sobieck | 10 | Son | — | Michigan |
| 73 | Fred Sobieck | 9 | Son | — | Michigan |
| 74 | Joan Sobieck | 8 | Daughter | — | Michigan |
| 75 | Donald E. Sobieck | 5 | Son | — | Illinois |
| 76 | Annette E. Sobieck | 2 | Daughter | — | Michigan |
| 77 | James R. Sobieck | 1 | Son | — | Illinois |
| 78 | Alex Swirago | 46 | Head | Second Cook | Lithuania |
| 79 | Helen Swirago | 32 | Wife | Dressmaker | Poland |
| 80 | Theodore Swirago | 19 | Son | All-Around Boy | Illinois |
Related Census Records
Pedigree Summary
Arthur + 4 siblings
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)