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John Lang — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Lang across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lang |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | New worker |
| Class of Worker | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | New Worker |
| Township / Ward | Chicago |
| Est. Birth Year | ~1922 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Regina Lang | Daughter | — | 13 | ~1927 |
| Margaret Lang | Daughter | — | 20 | ~1920 |
| Mary Lang | Daughter | — | 15 | ~1925 |
| Delores Lang | Daughter | — | 7 | ~1933 |
| Elizabeth Lang | Daughter | — | 17 | ~1923 |
| Linda Lang | Daughter | — | 9 | ~1931 |
| Frank Lang | Head | — | 47 | ~1893 |
| Joseph Lang | Son | — | 11 | ~1929 |
| John Lang | Son | — | 18 | ~1922 |
| Elizabeth Lang | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Cook, Illinois
Son, age 8
Cook, Illinois · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lang |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Cook-County, Illinois
Son, age 18
Cook-County, Illinois · implied b. ~1922 — 10 household members
| Surname | Lang |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | New worker |
| Class of Worker | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 John Lang across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Lang
Son · 1940 · age 18 · b. ~1922 · Illinois
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Sibling
Elizabeth Lang
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Linda Lang
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Lang
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Lang
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Lang
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regina Lang
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delores Lang
Sibling · 1940 · age 7
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-t0627-01008-00036)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Steve Salvato | 58 | Head | Digger | Italy |
| 42 | Mary Salvato | 48 | Wife | — | Louisiana |
| 43 | Tony Salvato | 16 | Son | — | Illinois |
| 44 | Ignatius Fuchs | 40 | Head | Laborer | Hungary |
| 45 | Antoinette Fuchs | 39 | Wife | — | Wisconsin |
| 46 | George Fuchs | 17 | Son | Millwright | Illinois |
| 47 | Florence Fuchs | 15 | Daughter | — | Illinois |
| 48 | Marie Fuchs | 11 | Daughter | — | Illinois |
| 49 | Bobby Fuchs | 4 | Daughter | — | Illinois |
| 50 | Frank Niewodowski | 43 | Head | Coal And Express Man | Poland |
| 51 | Virginia Niewodowski | 42 | Wife | — | Poland |
| 52 | Harry Niewodowski | 22 | Son | Assembler | Illinois |
| 53 | Clara Howarka | 44 | Head | Saleslady | Bohemia |
| 54 | Betty Frank | 41 | Head | Sales Girl | Iowa |
| 55 | Herbert Frank | 16 | Son | — | Illinois |
| 56 | Frank Lang | 47 | Head | Laborer | Russia |
| 57 | Elizabeth Lang | 40 | Wife | — | Russia |
| 58 | Margaret Lang | 20 | Daughter | Clerk | Colorado |
| 59 | John Lang THIS PERSON | 18 | Son | New Worker | Colorado |
| 60 | Elizabeth Lang | 17 | Daughter | — | Colorado |
| 61 | Mary Lang | 15 | Daughter | — | Illinois |
| 62 | Regina Lang | 13 | Daughter | — | Illinois |
| 63 | Joseph Lang | 11 | Son | — | Illinois |
| 64 | Linda Lang | 9 | Daughter | — | Illinois |
| 65 | Delores Lang | 7 | Daughter | — | Illinois |
| 66 | Martin Schranz | 50 | Head | Cabinet Maker | Austria |
| 67 | Rose Schranz | 46 | Wife | — | Austria |
| 68 | Emily Schranz | 19 | Daughter | Countergirl | Austria |
| 69 | Anna Schranz | 17 | Daughter | Clerk | Austria |
| 70 | Rose Schranz | 16 | Daughter | — | Illinois |
| 71 | Joseph Schranz | 14 | Son | — | Illinois |
| 72 | Martin Schranz | 12 | Son | — | Illinois |
| 73 | Dorothy Schranz | 8 | Daughter | — | Illinois |
| 74 | Dominick Mecchetti | 56 | Head | Finisher | Italy |
| 75 | Mary Mecchetti | 49 | Wife | — | Italy |
| 76 | Amelia Mecchetti | 18 | Daughter | — | Illinois |
| 77 | Ernest Mecchetti | 16 | Son | — | Illinois |
| 78 | Aide Censotti | 45 | Head | — | Italy |
| 79 | Anna Censotti | 3 | Daughter | — | Illinois |
| 80 | Emil Kalas | 48 | Head | Millwright | Russia |
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)