OJ
Olga Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Olga Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 5-person household.
Age 49
b. ~1891
Female
Spouse
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1891 |
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 Olga | Age | Birth yr |
|---|---|---|---|---|
| Carl Johnson | Head | — | 49 | ~1891 |
| Olga Johnson | Spouse | — | 49 | ~1891 |
| Ruth Johnson | Daughter | — | 21 | ~1919 |
| Florence Johnson | Daughter | — | 22 | ~1918 |
| Ellis Hillstone | Other | — | 37 | ~1903 |
Census Appearances
1910
Cook, Illinois
Other, age 17
Cook, Illinois · implied b. ~1893 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Sweden |
| Children Born | 1909 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Servant |
| Industry | Private Family |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1920
Cook, Illinois
Other, age 28
Cook, Illinois · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Boarder |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Sweden |
| Year of Immigration | 1910 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Trained Nurse |
| Industry | City |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Year of Naturalization | 1914 |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Other, age 39
Cook, Illinois · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1913 |
| Age at First Marriage | 25 |
| 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 49
Cook-County, Illinois · implied b. ~1891 — 5 household members
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Olga Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Olga Johnson
Spouse · 1940 · age 49 · b. ~1891 · Illinois
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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-t0627-00942-00672)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arlene Wynne | 6 | Daughter | — | Illinois |
| 2 | William Hanekamp | 55 | Brother-in-law | Bookkeeper | Germany |
| 3 | Alfred Quarantani | 45 | Head | Forge Shop Foreman | Italy |
| 4 | Beda Quarantani | 47 | Wife | — | Illinois |
| 5 | William Quarantani | 20 | Son | Laborer | Illinois |
| 6 | Virginia Quarantani | 18 | Daughter | — | Illinois |
| 7 | John Johnson | 48 | Head | Car Inspector | Sweden |
| 8 | Gunhild Johnson | 44 | Wife | — | Sweden |
| 9 | Berger Johnson | 22 | Son | Laborer | Illinois |
| 10 | Walter Johnson | 22 | Son | Salesman | Illinois |
| 11 | Einar Johnson | 31 | Head | Grinder | Sweden |
| 12 | Gladys Johnson | 30 | Wife | — | Illinois |
| 13 | Carl Johnson | 49 | Head | Carpenter | Sweden |
| 14 | Olga Johnson THIS PERSON | 49 | Wife | — | Sweden |
| 15 | Florence Johnson | 22 | Daughter | General Office | Illinois |
| 16 | Ruth Johnson | 21 | Daughter | Masseur | Illinois |
| 17 | Ellis Hillstone | 37 | Lodger | Janitor | Sweden |
| 18 | Ferdinand Kuehl | 74 | Head | — | Wisconsin |
| 19 | Anna Kuehl | 67 | Wife | — | Germany |
| 20 | Norman Kuehl | 44 | Son | — | Illinois |
| 21 | John O'Brien | 30 | Head | Shipping Clerk | Ohio |
| 22 | Mildred O'Brien | 30 | Wife | — | Illinois |
| 23 | Richard O'Brien | 7 | Son | — | Illinois |
| 24 | William Ehwer | 48 | Head | Barber | Illinois |
| 25 | Helen Ehwer | 36 | Wife | — | Illinois |
| 26 | Irma Mager | 15 | Step-daughter | — | Illinois |
| 27 | George Holmquist | 45 | Head | Leverman | Illinois |
| 28 | Eunice Holmquist | 42 | Wife | — | Minnesota |
| 29 | Clarence Gerard | 23 | Son | Fireman | Illinois |
| 30 | Warren Gerard | 18 | Son | Asst | Illinois |
| 31 | Joyce Gerard | 13 | Daughter | — | Illinois |
| 32 | Michael Salvatore | 39 | Head | Chemist | France |
| 33 | Marie Salvatore | 40 | Wife | — | Illinois |
| 34 | Robert Salvatore | 15 | Son | — | Illinois |
| 35 | Lorraine Salvatore | 12 | Daughter | — | Illinois |
| 36 | Otto Thal | 51 | Head | — | Illinois |
| 37 | Elizabeth Thal | 51 | Wife | — | Illinois |
| 38 | Robert Thal | 26 | Son | Scaleman | Illinois |
| 39 | Richard Thal | 13 | Son | — | Illinois |
| 40 | Gunnar Ericson | 50 | Head | — | Sweden |
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)