GJ
Grace Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Grace Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Inga & David — first a daughter (b.~1915), then head of a 2-person household.
Age 25
b. ~1915
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | stenographer |
| Industry | finance corp. |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 236 |
| Highest Grade | S 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Stenographer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1915 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Grace | Age | Birth yr |
|---|---|---|---|---|
| Grace Johnson | Daughter | — | 25 | ~1915 |
| Inga Johnson | Head | — | 66 | ~1874 |
Census Appearances
1920
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 14
Cook, Illinois · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 25
Cook-County, Illinois · implied b. ~1915 — 2 household members
| Surname | Johnson |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | stenographer |
| Industry | finance corp. |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 236 |
| Highest Grade | S 8 |
| 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 Grace Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Inga Johnson (~0.92 confidence) and father David Johnson (~0.92 confidence) and mother Emily Johnson (~0.92 confidence) and father John Johnson (~0.92 confidence) and mother Hazel Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Inga Johnson
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
David Johnson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Emily Johnson
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
John Johnson
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Hazel Johnson
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Grace Johnson
Daughter · 1940 · age 25 · b. ~1915 · 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
39 people indexed on this census page (nara:1940:m-t0627-01016-00431)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Andersen | 71 | Head | — | Sweden |
| 42 | Hazel Andersen | 35 | Daughter | Homework | Illinois |
| 43 | Lauchie Mckinnon | 54 | Head | Painter | Canada-English |
| 44 | Barbara Mckinnon | 40 | Wife | — | Newfoundland |
| 45 | Michael Rausch | 41 | Head | Conductor | New York |
| 46 | Beatrice Rausch | 37 | Wife | — | Irish Free State |
| 47 | John Rausch | 15 | Son | — | Illinois |
| 48 | Jean Rausch | 11 | Daughter | — | Illinois |
| 49 | James Rausch | 9 | Son | — | Illinois |
| 50 | Dorothy Wagner | 34 | Head | Beauty Operator | Illinois |
| 51 | Howard Wagner | 34 | Husband | Yardman | Illinois |
| 52 | Kenneth Wagner | 9 | Son | — | Illinois |
| 53 | Louise Sinkovitz | 21 | Lodger | General Office Work | Illinois |
| 54 | Rose Sinkovitz | 17 | Lodger | — | Illinois |
| 55 | Pete Florian | 41 | Head | Janitor | Rumania |
| 56 | Katherine Florian | 37 | Wife | — | Rumania |
| 57 | George Florian | 16 | Son | — | Illinois |
| 58 | Dolores Florian | 10 | Daughter | — | Illinois |
| 59 | Peter Wagner | 40 | Head | Cook | Germany |
| 60 | Margaret Wagner | 36 | Wife | — | Germany |
| 61 | John Wagner | 14 | Son | — | Illinois |
| 62 | Emmet Torg | 50 | Head | Proprietor | Michigan |
| 63 | Florence Torg | 46 | Wife | — | Illinois |
| 64 | John Lange | 40 | Head | Tool + Die Maker | Germany |
| 65 | Gertrude Lange | 39 | Wife | Monogrammer | Germany |
| 66 | Margaret Lange | 4 | Daughter | — | Illinois |
| 67 | William R. Parvin | 77 | Head | — | Pennsylvania |
| 68 | Gertrude Parvin | 76 | Wife | — | New Jersey |
| 70 | Inga Johnson | 66 | Head | — | Norway |
| 71 | Grace Johnson THIS PERSON | 25 | Daughter | Stenographer | Illinois |
| 72 | William Hill | 55 | Head | Problem Fitter | Indiana |
| 73 | Barbara Hill | 55 | Wife | — | Germany |
| 74 | John Hill | 12 | Son | — | Illinois |
| 75 | William Jr. Hill | 11 | Son | — | Illinois |
| 76 | James Ramseth | 19 | Nephew | — | Illinois |
| 77 | Levern Ramseth | 15 | Nephew | — | Illinois |
| 78 | Frank Pazera | 26 | Head | Shipping Clerk | Illinois |
| 79 | Jean Pazera | 26 | Wife | Clerk-Service | Virginia |
| 80 | John Pazera | 4 | Son | — | Illinois |
Pedigree Summary
Grace
Gen 1 · 5 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)