WP
Walter Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Walter Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Anna & Anna — first a son (b.~1906), then head of a 5-person household.
Age 34
b. ~1906
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Roofer |
| Industry | Roofing Cont. |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1200 |
| Highest Grade | H 3 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Roofer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1906 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Walter | Age | Birth yr |
|---|---|---|---|---|
| Olga Peterson | Spouse | — | 51 | ~1889 |
| Shirley Peterson | Daughter | — | 18 | ~1922 |
| Louise Peterson | Daughter | — | 26 | ~1914 |
| Walter Peterson | Son | — | 34 | ~1906 |
| Charles Peterson | Head | — | 59 | ~1881 |
Census Appearances
1920
Cook, Illinois
Son, age 13
Cook, Illinois · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 23
Cook, Illinois · implied b. ~1907 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Printer |
| Industry | Publishing Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 34
Cook-County, Illinois · implied b. ~1906 — 5 household members
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Roofer |
| Industry | Roofing Cont. |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1200 |
| Highest Grade | H 3 |
| 1935 Residence | Same House |
| 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 Walter Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Anna Peterson (~0.92 confidence) and mother Anna Peterson (~0.92 confidence) and father Albin Peterson (~0.92 confidence) and father Charles Peterson (~0.92 confidence) and mother Olga Peterson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Anna Peterson
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Anna Peterson
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
Albin Peterson
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Charles Peterson
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Olga Peterson
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Walter Peterson
Son · 1940 · age 34 · b. ~1906 · Illinois
★ You are viewing this record
Sibling
Shirley Peterson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Peterson
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-t0627-00987-00048)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Kish | 40 | Head | Milkman | Illinois |
| 42 | Margaret Kish | 37 | Wife | — | Illinois |
| 43 | Charles Kish | 15 | Son | — | Illinois |
| 44 | Robert Kish | 13 | Son | — | Illinois |
| 45 | Raymond Kish | 11 | Son | — | Illinois |
| 46 | Michael Hinz | 81 | Head | — | Germany |
| 47 | Mary Hinz | 83 | Wife | — | Germany |
| 48 | Mary Erickson | 61 | Head | — | Finland |
| 49 | Sjodine Erickson | 61 | Cousin | — | Illinois |
| 50 | Marie Meyers | 43 | Head | — | Illinois |
| 51 | William Meyers | 22 | Son | Assembler | Illinois |
| 52 | Dolly Meyers | 24 | Daughter | Thread Winder | Illinois |
| 53 | Charles Hacker | 44 | Head | Mailman | Illinois |
| 54 | Olga Hacker | 38 | Wife | — | Illinois |
| 55 | Eleanor Hacker | 18 | Daughter | Milliner | Illinois |
| 56 | Lorraine Hacker | 16 | Daughter | — | Illinois |
| 57 | Lillian Gacke | 22 | Daughter | Assembler | Wisconsin |
| 58 | Thomas Gacke | 19 | Son | Trucker | Wisconsin |
| 59 | Casimer Broza | 59 | Head | Cutter | Germany |
| 60 | Augusta Broza | 58 | Wife | — | Germany |
| 61 | Mary Broza | 30 | Daughter | Ironer | Pennsylvania |
| 62 | George Mclean | 40 | Head | Drill | Wisconsin |
| 63 | Ruth Mclean | 41 | Wife | Office Clerk | Illinois |
| 64 | George Almquist | 51 | Brother in law | Watchman | Sweden |
| 65 | Charles Peterson | 59 | Head | Roofing | Norway |
| 66 | Olga Peterson | 51 | Wife | — | Illinois |
| 67 | Walter Peterson THIS PERSON | 34 | Son | Roofer | Illinois |
| 68 | Louise Peterson | 26 | Daughter | — | Illinois |
| 69 | Shirley Peterson | 18 | Daughter | Stenographer | Illinois |
| 70 | Albert Jenkins | 39 | Head | Upholsterer | England |
| 71 | Margaret Jenkins | 34 | Wife | — | Scotland |
| 72 | Margaret Jenkins | 13 | Daughter | — | Illinois |
| 73 | Robert Jenkins | 12 | Son | — | Illinois |
| 74 | Catherine Jenkins | 11 | Daughter | — | Illinois |
| 75 | Elvie Jenkins | 5 | Daughter | — | Illinois |
| 76 | Albert Jenkins | 2 | Son | — | Illinois |
| 77 | William Rothmann | 50 | Head | Janitor | Illinois |
| 78 | Anna Rothmann | 46 | Wife | — | Illinois |
| 79 | Thomas Rothmann | 20 | Son | Solder | Illinois |
| 80 | Violet Rothmann | 17 | Daughter | — | Illinois |
Pedigree Summary
Walter + 2 siblings
Gen 1 · 5 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)