JP
John Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1894), then head of a 7-person household.
Age 46
b. ~1894
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Steel worker |
| Industry | mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 900 |
| Highest Grade | H-5 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Steel Worker |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1894 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Ruby Peterson | Daughter | — | 18 | ~1922 |
| Audrey Peterson | Daughter | — | 14 | ~1926 |
| John Peterson | Head | — | 46 | ~1894 |
| Ralph Peterson | Son | — | 23 | ~1917 |
| Warren Peterson | Son | — | 16 | ~1924 |
| Don Peterson | Son | — | 10 | ~1930 |
| Alice Peterson | Spouse | — | 34 | ~1906 |
Census Appearances
1920
Cook, Illinois
Head, age 26
Cook, Illinois · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Laborer |
| Industry | Steel Mills |
| Class of Worker | W W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Cook, Illinois
Head, age 36
Cook, Illinois · implied b. ~1894 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 22 |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Sweden |
| Occupation | Machinist |
| Industry | Steel Mills |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 65 |
| Radio Set | R |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Cook-County, Illinois
Head, age 46
Cook-County, Illinois · implied b. ~1894 — 7 household members
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Steel worker |
| Industry | mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 900 |
| Highest Grade | H-5 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Peterson
Head · 1940 · age 46 · b. ~1894 · 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-t0627-00942-00177)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Peterson THIS PERSON | 46 | Head | Steel Worker | Wisconsin |
| 42 | Alice Peterson | 34 | Wife | — | Wisconsin |
| 43 | Ralph Peterson | 23 | Son | Steel Worker | Illinois |
| 44 | Ruby Peterson | 18 | Daughter | — | Illinois |
| 45 | Warren Peterson | 16 | Son | — | Illinois |
| 46 | Audrey Peterson | 14 | Daughter | — | Illinois |
| 47 | Don Peterson | 10 | Son | — | Illinois |
| 48 | Harold Peterson | 41 | Head | Layer Out | Illinois |
| 49 | Mabel Peterson | 45 | Wife | Laborer | Illinois |
| 50 | Elmer Peterson | 48 | Brother | — | Illinois |
| 51 | Gilbert Dahl | 26 | Nephew | Rammer | Illinois |
| 52 | Edith Larsen | 38 | Sister | Stenographer | Illinois |
| 53 | Marjorie Larsen | 16 | Niece | — | Illinois |
| 54 | Jerry Ernini | 67 | Head | Watchman | Ohio |
| 55 | Ella Ernini | 60 | Wife | — | Ohio |
| 56 | Theodore Ernini | 22 | Son | Laborer | Ohio |
| 57 | John E. Ericson | 43 | Head | Carpenter | Sweden |
| 58 | Hanna Ericson | 45 | Wife | — | Sweden |
| 59 | Richard Ericson | 20 | Son | Laborer | Illinois |
| 60 | Dorothy Ericson | 18 | Daughter | — | Illinois |
| 61 | Albert Ericson | 16 | Son | — | Illinois |
| 62 | Frank F. Dietz | 45 | Head | Mechanic | Illinois |
| 63 | Clara Dietz | 43 | Wife | — | Illinois |
| 64 | Dorothy Dietz | 17 | Daughter | — | Illinois |
| 65 | Frank Jr. Dietz | 15 | Son | — | Illinois |
| 66 | Mary E. Smith | 45 | Head | — | Illinois |
| 67 | Ruth Smith | 17 | Daughter | — | Illinois |
| 68 | Ada Smith | 15 | Daughter | — | Illinois |
| 69 | Nicholas Bieger | 34 | Head | Malster | Illinois |
| 70 | Mae Bieger | 33 | Wife | — | Illinois |
| 71 | Mary Ann Bieger | 10 | Daughter | — | Illinois |
| 72 | Rosemary Bieger | 8 | Daughter | — | Illinois |
| 73 | Delores Bieger | 6 | Daughter | — | Illinois |
| 74 | Nicholas Jr. Bieger | 3 | Son | — | Illinois |
| 75 | Bernard Jung | 57 | Head | Machinist | Austria |
| 76 | Theresa Jung | 54 | Wife | — | Austria |
| 77 | Theresa Jung | 18 | Daughter | Filing Clerk | Illinois |
| 78 | John Sobek | 27 | Head | Loader | Pennsylvania |
| 79 | Anna Sobek | 26 | Wife | — | Illinois |
| 80 | John Jr. Sobek | 1 | Son | — | Illinois |
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)