RP
Richard Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Richard Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Rose — first a son (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Male
Son
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | tool & die maker apprentice |
| Industry | tool & die mfg |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Tool & Die Maker Apprentice |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1910 |
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 Richard | Age | Birth yr |
|---|---|---|---|---|
| James Peterson | Son | — | 31 | ~1909 |
| Richard Peterson | Son | — | 30 | ~1910 |
| Frank Barrett | Other | — | 52 | ~1888 |
| Helen Peterson | Other | — | 26 | ~1914 |
| Rose Peterson | Head | — | 61 | ~1879 |
Census Appearances
1920
Cook, Illinois
Son, age 8
Cook, Illinois · implied b. ~1912 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 19
Cook, Illinois · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Richard |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Pattern maker |
| Industry | Wood shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 30
Cook-County, Illinois · implied b. ~1910 — 5 household members
| Surname | Peterson |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | tool & die maker apprentice |
| Industry | tool & die mfg |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | H-1 |
| 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 Richard Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Rose Peterson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Rose Peterson
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Richard Peterson
Son · 1940 · age 30 · b. ~1910 · Illinois
★ You are viewing this record
Sibling
James Peterson
Sibling · 1940 · age 31
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-t0627-00989-00864)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Carter | 51 | Head | — | Illinois |
| 42 | Ruth Carter | 23 | Daughter | Check Writer | Minnesota |
| 43 | Florence Carter | 20 | Daughter | Order Taker | Minnesota |
| 44 | Harold Carter | 18 | Son | — | Minnesota |
| 45 | Charles Gaber | 35 | Head | Typist | Poland |
| 46 | Lottie Gaber | 25 | Wife | — | Illinois |
| 47 | Susan Gaber | 2 | Daughter | — | Illinois |
| 48 | John Wagner | 60 | In-law | Buffer & Polisher | Germany |
| 49 | Wladyslaw Borowicz | 57 | Head | Grocery Proprietor | Russia |
| 50 | Johanna Borowicz | 55 | Wife | — | Poland |
| 51 | John Pisch | 80 | Head | — | Germany |
| 52 | Wilhelmina Pisch | 73 | Wife | — | Germany |
| 53 | Frank Piehl | 52 | Head | Assembler | Illinois |
| 54 | Louise Piehl | 50 | Wife | — | Illinois |
| 55 | Norman Piehl | 21 | Son | Assembler | Illinois |
| 56 | Frank Jr. Piehl | 13 | Son | — | Illinois |
| 57 | Wilhelm Ott | 82 | In-law | — | Germany |
| 58 | Rose Peterson | 61 | Head | — | Illinois |
| 59 | James Peterson | 31 | Son | Bill Clerk | Illinois |
| 60 | Richard Peterson THIS PERSON | 30 | Son | Tool & Die Maker Apprentice | Illinois |
| 61 | Helen Peterson | 26 | Daughter-in-law | — | Illinois |
| 62 | Frank Barrett | 52 | Lodger | Beauty Operator | Illinois |
| 63 | Edith Schneider | 52 | Head | Clerk | Illinois |
| 64 | Albertina Anderson | 62 | Head | — | Illinois |
| 65 | Dorothy Carpenter | 32 | Daughter | — | Illinois |
| 66 | Leane Carpenter | 4 | Daughter | — | Illinois |
| 67 | Minnie Weichbrodt | 66 | Head | — | Illinois |
| 68 | Florence Weichbrodt | 42 | Daughter | Carton Filler | Illinois |
| 69 | Carolyn Weichbrodt | 41 | Daughter | — | Illinois |
| 70 | Norman Weichbrodt | 29 | Son | Punch Press Operator | Illinois |
| 71 | Myrtle Mastbaer | 13 | Friend | — | Illinois |
| 72 | Georgina Thorson | 83 | Head | — | Norway |
| 73 | Robert Hall | 39 | Head | Ticket Agent | Indiana |
| 74 | Dorothy Hall | 38 | Wife | — | Colorado |
| 75 | Mary Hall | 17 | Daughter | — | Colorado |
| 76 | Robert Jr. Hall | 15 | Son | — | Illinois |
| 77 | William Hall | 13 | Son | — | Illinois |
| 78 | James Hall | 12 | Son | — | Illinois |
| 79 | Elizabeth Hall | 5 | Daughter | — | Illinois |
| 80 | Dorothy Hall | 7 | Daughter | — | Illinois |
Pedigree Summary
Richard + 1 sibling
Gen 1 · 1 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)