JB
John Berg — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Berg across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Anna — first a head (b.~1895), then head of a 3-person household.
Age 45
b. ~1895
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Berg |
| Given Name | John D |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | tool & die maker |
| Industry | mfg. auto parts |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2360 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Tool & Die Maker |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1895 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Alice Berg | Spouse | — | 40 | ~1900 |
| Robert Berg | Son | — | 13 | ~1927 |
| John Berg | Head | — | 45 | ~1895 |
Census Appearances
1920
Cook, Illinois
Son, age 27
Cook, Illinois · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Berg |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Sweden |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Head, age 35
Cook, Illinois · implied b. ~1895 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Berg |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1917 |
| Age at First Marriage | 29 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Tool Maker |
| Industry | Auto accessories |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Value / Rent | 8000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Head, age 45
Cook-County, Illinois · implied b. ~1895 — 3 household members
| Surname | Berg |
| Given Name | John D |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | tool & die maker |
| Industry | mfg. auto parts |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2360 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| 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 John Berg across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Berg (~0.92 confidence) and mother Anna Berg (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Berg
b. ~1846
Source father
● Household
· direct · ~0.92
Mother
Anna Berg
b. ~1866
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Berg
Head · 1940 · age 45 · b. ~1895 · 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
39 people indexed on this census page (nara:1940:m-t0627-00999-00400)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mildred A Broling | 36 | wife | 0 | Kentucky |
| 42 | Margaret Broling | 10 | daughter | — | Illinois |
| 43 | Frederick Broling | 4 | son | — | Illinois |
| 44 | John D Berg THIS PERSON | 45 | head | Tool & Die Maker | Sweden |
| 45 | Alice Berg | 40 | wife | 0 | Illinois |
| 46 | Robert Berg | 13 | son | — | Illinois |
| 47 | Louis Koutas | 39 | head | Prop. Of Restaurant | Greece |
| 48 | Ada D Koutas | 37 | wife | 0 | Oklahoma |
| 49 | Helen A Koutas | 16 | daughter | 0 | Oklahoma |
| 50 | Mary Lou Koutas | 6 | daughter | — | Illinois |
| 51 | John Rassello | 65 | head | Brick-Layer | Italy |
| 52 | Teresa D Rassello | 49 | wife | 0 | Italy |
| 53 | Nino J Rassello | 25 | son | Lawyer | Illinois |
| 55 | Einar Boasman | 47 | head | Tool Maker | Sweden |
| 56 | Nora E Boasman | 48 | wife | 0 | Illinois |
| 57 | Warren Boasman | 14 | son | Apprentice Tool Maker | Illinois |
| 58 | June Boasman | 12 | daughter | — | Illinois |
| 59 | Louis D Dekanic | 51 | head | Wood Pattern Maker | Hungary |
| 60 | Margaret Dekanic | 41 | wife | Dress Maker | Hungary |
| 61 | Margaret Jr Dekanic | 20 | daughter | Stenographer | Illinois |
| 62 | Alice Dekanic | 13 | daughter | — | Illinois |
| 63 | Cynthia D Koff | 64 | head | 0 | Michigan |
| 64 | Charles Koff | 50 | son | Bank-Teller | Illinois |
| 65 | Harry A Koff | 31 | son | Advertising Clerk | Illinois |
| 66 | Samuel D Cicero | 50 | head | Fruit Peddler | Italy |
| 67 | Rose Cicero | 43 | wife | 0 | Italy |
| 68 | Sam Jr Cicero | 21 | son | Truck Driver | Illinois |
| 69 | Charles Cicero | 18 | son | Chauffeur | Illinois |
| 70 | Rose Jr Cicero | 19 | daughter | Beauty Operator | Illinois |
| 71 | Philip Pruitt | 27 | head | School-Bus Chauffeur | Illinois |
| 72 | Esther D Pruitt | 25 | wife | 0 | Illinois |
| 73 | Arlene Pruitt | 3 | daughter | — | Illinois |
| 74 | Felix Wodkiewicz | 39 | head | Metal Polisher | Wisconsin |
| 75 | Agnes D Wodkiewicz | 38 | wife | 0 | Wisconsin |
| 76 | Gabrielle Wodkiewicz | 15 | daughter | 0 | Illinois |
| 77 | Alice Wodkiewicz | 14 | daughter | 0 | Illinois |
| 78 | Lorraine Wodkiewicz | 12 | daughter | — | Illinois |
| 79 | Felix Jr Wodkiewicz | 9 | son | — | Illinois |
| 80 | Gilbert Wodkiewicz | 21 | nephew | Cooper | Wisconsin |
Pedigree Summary
John
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)