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 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Lars & Amanda — first a head (b.~1894), then head of a 4-person household.
Age 46
b. ~1894
Male
Head
Born: Illinois
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Walter B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Divorced |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Laborer |
| Industry | Construction |
| Class of Worker | GW |
| Hours Worked | 3 |
| Income (1939) | 1171 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Walter | Age | Birth yr |
|---|---|---|---|---|
| Charley Peterson | Other | — | 77 | ~1863 |
| Lattie Peterson | Other | — | 75 | ~1865 |
| Walter Peterson | Head | — | 46 | ~1894 |
| Roland Peterson | Son | — | 14 | ~1926 |
Census Appearances
1910
Cook, Illinois
Son, age 15
Cook, Illinois · implied b. ~1895 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Swed. Swedish |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Son, age 25
Cook, Illinois · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Sweden |
| Occupation | Supperman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 36
Cook, Illinois · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Real Estate Subdivision |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 46
Cook-County, Illinois · implied b. ~1894 — 4 household members
| Surname | Peterson |
| Given Name | Walter B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Divorced |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Laborer |
| Industry | Construction |
| Class of Worker | GW |
| Hours Worked | 3 |
| Income (1939) | 1171 |
| Highest Grade | Hs 4 |
| 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 Walter Peterson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lars Peterson (~0.92 confidence) and mother Amanda Peterson (~0.92 confidence) and mother Amanda Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lars Peterson
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Amanda Peterson
b. ~1863
Source mother
● Household
· direct · ~0.92
Mother
Amanda Peterson
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Walter 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-t0627-01001-00295)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter B. Peterson THIS PERSON | 46 | Head | Laborer | Illinois |
| 2 | Roland I. Peterson | 14 | Son | — | Illinois |
| 3 | Charley Peterson | 77 | Father | — | Sweden |
| 4 | Lattie Peterson | 75 | Mother | — | Sweden |
| 5 | Marie Carlstedt | 42 | Head | — | Illinois |
| 6 | Audrey Carlstedt | 15 | Daughter | Stenographer | Illinois |
| 7 | August Carlstedt | 73 | Father | Metalworker | Germany |
| 8 | Eric Hedberg | 58 | Head | Office Clerk | Sweden |
| 9 | Hanna Hedberg | 59 | Wife | — | Illinois |
| 10 | Paul Hedberg | 27 | Son | — | Illinois |
| 11 | Donald Sargent | 37 | Head | Salesman | Illinois |
| 12 | Helen Sargent | 35 | Wife | — | Illinois |
| 13 | Kathleen Sargent | 4 | Daughter | — | Illinois |
| 14 | Myra Collier | 26 | Housekeeper | Housekeeper | Michigan |
| 15 | Bertha Etansky | 68 | Head | — | Sweden |
| 16 | Elsie Etansky | 43 | Daughter | Operator Comptroller | Illinois |
| 17 | John Marcumese | 25 | Roomer | — | New York |
| 18 | Axel Lundberg | 58 | Head | Machinist | Sweden |
| 19 | Ellen Lundberg | 56 | Wife | — | Sweden |
| 20 | Bertha Peterson | 47 | Head | — | Sweden |
| 21 | Mamie Peterson | 43 | Sister | — | Illinois |
| 22 | Naomi Peterson | 41 | Sister | Stenographer | Illinois |
| 23 | Herman Waitz | 44 | Head | Furrier | Illinois |
| 24 | Marsha Waitz | 28 | Wife | — | Illinois |
| 25 | Kenneth Waitz | 15 | Son | — | Illinois |
| 26 | Jerome Waitz | 15 | Son | — | Illinois |
| 27 | Anna Myka | 20 | Housekeeper | Housekeeper | Illinois |
| 28 | Nathan H. Goldman | 39 | Head | Salesman | Minnesota |
| 29 | Tillie Goldman | 36 | Wife | — | Illinois |
| 30 | Rubina Goldman | 11 | Daughter | — | Illinois |
| 31 | Clara Levow | 64 | Mother-in-law | — | Russia |
| 32 | Christine Lehertz | 22 | Maid | Maid | North Dakota |
| 33 | Harry Einhorn | 57 | Head | Tailor | Austria |
| 34 | David Einhorn | 30 | Son | Salesman | Illinois |
| 35 | Geraldine Einhorn | 24 | Daughter | Bookkeeper | Illinois |
| 36 | Teresa Einhorn | 22 | Daughter | Bookkeeper | Illinois |
| 37 | Grace Einhorn | 20 | Daughter | Stenographer | Illinois |
| 38 | Axel Johnson | 68 | Head | Janitor | Sweden |
| 39 | Selma Johnson | 62 | Wife | — | Sweden |
| 40 | Clara Johnson | 32 | Daughter | Stenographer | Illinois |
Pedigree Summary
Walter
Gen 1 · 3 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)