OJ
Olga Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lasalle-County, Illinois
Our Model Tree links this Olga Johnson across the 1920, 1930 and 1940 US Censuses in Lasalle-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 3-person household.
Age 48
b. ~1892
Female
Spouse
Born: Norway
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lasalle-County, Illinois |
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Sheridan Village |
| 1935 Residence (County) | LaSalle |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 5 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
| Township / Ward | Sheridan Village |
| Est. Birth Year | ~1892 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Olga | Age | Birth yr |
|---|---|---|---|---|
| Ben Johnson | Head | — | 51 | ~1889 |
| Olga Johnson | Spouse | — | 48 | ~1892 |
| Gilbert Johnson | Son | — | 20 | ~1920 |
Census Appearances
1920
La Salle, …
Spouse, age 28
La Salle, Illinois · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Norway |
| Year of Immigration | 1907 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1930
La Salle, …
Other, age 38
La Salle, Illinois · implied b. ~1892 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Norway |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Age at First Marriage | 25 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Norwegian |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1940
Lasalle-County, Illinois
Spouse, age 48
Lasalle-County, Illinois · implied b. ~1892 — 3 household members
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Sheridan Village |
| 1935 Residence (County) | LaSalle |
| Naturalization Status | Naturalized |
| Hours Worked | 5 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Olga Johnson
Spouse · 1940 · age 48 · b. ~1892 · 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 — Lasalle-County, Illinois
Open full size
1940 US Federal Census — Lasalle-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00833-00842)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Irene Pearson | 23 | Wife | — | Illinois |
| 42 | Annie Ugland | 62 | Head | — | Illinois |
| 43 | George L. Snyder | 56 | Head | Policeman | Illinois |
| 44 | Lucy Snyder | 51 | Wife | — | Illinois |
| 45 | La Verne Snyder | 19 | Son | New Worker | Illinois |
| 46 | George Snyder | 13 | Son | — | Illinois |
| 47 | Oscar Ferguson | 38 | Head | Carpenter | Kentucky |
| 48 | Mabel Ferguson | 32 | Wife | — | Illinois |
| 49 | Thomas Ferguson | 14 | Son | — | Illinois |
| 50 | Mildred Ferguson | 12 | Daughter | — | Illinois |
| 51 | Wayne Ferguson | 11 | Son | — | Illinois |
| 52 | Jackie Ferguson | 8 | Son | — | Illinois |
| 53 | Ross Ferguson | 6 | Daughter | — | Illinois |
| 54 | Joyce Ferguson | 4 | Daughter | — | Illinois |
| 55 | Ben Johnson | 51 | Head | Contractor | Norway |
| 56 | Olga Johnson THIS PERSON | 48 | Wife | — | Norway |
| 57 | Gilbert Johnson | 20 | Son | Carpenter | Illinois |
| 58 | John Kaiser | 51 | Head | Contractor | Oklahoma |
| 59 | Ruth Kaiser | 47 | Wife | — | Illinois |
| 60 | Dorothy Kaiser | 25 | Daughter | Beauty Operator | Oklahoma |
| 61 | Marilyn Kaiser | 19 | Daughter | Telephone Operator | Illinois |
| 62 | John Kaiser | 12 | Son | — | Illinois |
| 63 | Gene Kaiser | 11 | Son | — | Illinois |
| 64 | William Coteur | 62 | Head | Cemetery Supt. | Illinois |
| 65 | Mattie Coteur | 57 | Wife | — | Illinois |
| 66 | Frederick Coteur | 30 | Son | Salesman | Illinois |
| 67 | William Coteur | 26 | Son | Farm Hand | Illinois |
| 68 | Darwin Rohrer | 37 | Head | Farm Hand | Illinois |
| 69 | Della Rohrer | 34 | Wife | — | Illinois |
| 70 | Kenneth Rohrer | 9 | Son | — | Illinois |
| 71 | Darilyn Rohrer | 6 | Daughter | — | Illinois |
| 72 | Kenneth Mulvaney | 25 | Head | Salesman | Illinois |
| 73 | Blanche Mulvaney | 24 | Wife | — | Illinois |
| 74 | Minne Knight | 70 | Head | — | Illinois |
| 75 | Ross Wakeley | 22 | Head | Laborer | Illinois |
| 76 | Ruth Wakeley | 18 | Wife | — | Illinois |
| 77 | Douglas Wakeley | 12 | Son | — | Illinois |
| 78 | Clarence Tomlin | 45 | Head | Laborer | Illinois |
| 79 | Laura Tomlin | 46 | Wife | — | Illinois |
| 80 | Dale Tomlin | 19 | Son | Salesman | Illinois |
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)