AP
Agnes Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Agnes Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1896), then head of a 6-person household.
Age 44
b. ~1896
Female
Spouse
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Agnes |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Township / Ward | Chicago |
| Est. Birth Year | ~1896 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Agnes | Age | Birth yr |
|---|---|---|---|---|
| Ingrid Peterson | Daughter | — | 10 | ~1930 |
| Roy Peterson | Son | — | 23 | ~1917 |
| Agnes Peterson | Spouse | — | 44 | ~1896 |
| Oscar Peterson | Head | — | 45 | ~1895 |
| Frank Peterson | Son | — | 17 | ~1923 |
| Brita Peterson | Daughter | — | 21 | ~1919 |
Census Appearances
1920
Cook, Illinois
Spouse, age 27
Cook, Illinois · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Agnes |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1910 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Spouse, age 35
Cook, Illinois · implied b. ~1895 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Agnes |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1913 |
| Age at First Marriage | 22 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Spouse, age 44
Cook-County, Illinois · implied b. ~1896 — 6 household members
| Surname | Peterson |
| Given Name | Agnes |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Alien |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| 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 Agnes Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Agnes Peterson
Spouse · 1940 · age 44 · b. ~1896 · 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-t0627-01015-00192)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Inex Turnkvist | 64 | Mother-in-law | — | Sweden |
| 42 | Anthony Burski | 41 | Head | Die Maker | Illinois |
| 43 | Laura Burski | 38 | Wife | — | Illinois |
| 44 | Albert Horn | 14 | Son | — | Illinois |
| 45 | Lawritz Petersen | 38 | Head | Janitor | Norway |
| 46 | Agnes Petersen | 42 | Wife | — | Illinois |
| 47 | Minnie Stark | 62 | Head | — | Sweden |
| 48 | Edna Stark | 39 | Daughter | Office Girl | Illinois |
| 49 | John Hudec | 28 | Head | Decorator | Illinois |
| 50 | Lucille Hudec | 23 | Wife | — | Illinois |
| 51 | Ben Liltequist | 32 | Head | Stationary Engineer | Sweden |
| 52 | Elsie Liltequist | 28 | Wife | — | Sweden |
| 53 | Herbert Liltequist | 8 | Son | — | Illinois |
| 54 | Charles O'Connor | 62 | Head | — | Illinois |
| 55 | Maude O'Connor | 67 | Wife | — | Kentucky |
| 56 | Henry Dana | 37 | Step-son | — | Illinois |
| 57 | Oscar Peterson | 45 | Head | Painter | Sweden |
| 58 | Agnes Peterson THIS PERSON | 44 | Wife | — | Sweden |
| 59 | Roy Peterson | 23 | Son | Salesman | Sweden |
| 60 | Brita Peterson | 21 | Daughter | Saleswoman | Sweden |
| 61 | Frank Peterson | 17 | Son | — | Sweden |
| 62 | Ingrid Peterson | 10 | Daughter | — | Illinois |
| 63 | David Thayer | 55 | Head | Conductor | Wisconsin |
| 64 | Eva Thayer | 46 | Wife | — | Wisconsin |
| 65 | Ruth Thayer | 21 | Daughter | Secretary | Illinois |
| 66 | Helen Thayer | 19 | Daughter | House Worker | Illinois |
| 67 | Margie Thayer | 16 | Daughter | — | Illinois |
| 68 | Charles Thayer | 14 | Son | — | Illinois |
| 69 | Charles Jaquith | 76 | Uncle | — | Wisconsin |
| 70 | David Laplant | 56 | Head | — | Canada |
| 71 | Mamie Laplant | 56 | Wife | — | Illinois |
| 72 | Genevieve Laplant | 26 | Daughter | Proof Reader | Illinois |
| 73 | David Jr Laplant | 24 | Son | Sales Clerk | Illinois |
| 74 | Walter Magnuson | 48 | Head | Yard Man | Sweden |
| 75 | Gertrude Magnuson | 44 | Wife | — | Norway |
| 76 | Raymond Magnuson | 22 | Son | — | Illinois |
| 77 | Irene Magnuson | 14 | Daughter | — | Illinois |
| 78 | Walter Jr Magnuson | 7 | Son | — | Illinois |
| 79 | William Hepp | 57 | Head | Stationary Engineer | Illinois |
| 80 | Anna Hepp | 54 | Wife | — | Germany |
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)