RL
Robert Larson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Larson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Esther — first a son (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Drafter |
| Industry | Steel Firm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Drafter |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1909 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Larson | Son | — | 31 | ~1909 |
| Gustaf Larson | Son | — | 33 | ~1907 |
| Esther Larson | Head | — | 62 | ~1878 |
| Violet Larson | Daughter | — | 29 | ~1911 |
Census Appearances
1920
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 22
Cook, Illinois · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Office Clerk |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 31
Cook-County, Illinois · implied b. ~1909 — 4 household members
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Drafter |
| Industry | Steel Firm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 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 Robert Larson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Larson (~0.92 confidence) and mother Esther Larson (~0.92 confidence) and mother Esther Larson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Larson
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Esther Larson
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Esther Larson
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Larson
Son · 1940 · age 31 · b. ~1909 · Illinois
★ You are viewing this record
Sibling
Gustaf Larson
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Larson
Sibling · 1940 · age 29
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
39 people indexed on this census page (nara:1940:m-t0627-00958-00202)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Esther Larson | 62 | Head | — | Sweden |
| 2 | Gustaf Larson | 33 | Son | Accounting | Illinois |
| 3 | Robert Larson THIS PERSON | 31 | Son | Drafter | Illinois |
| 4 | Violet Larson | 29 | Daughter | Stenographer | Illinois |
| 5 | Victor Larson | 73 | Head | — | Sweden |
| 6 | Stanley Larson | 30 | Son | — | Illinois |
| 7 | Helen Fuller | 70 | Head | — | New York |
| 8 | Albert Theis | 35 | Lodger | Mechanic | Illinois |
| 9 | Bertha Monteen | 29 | Lodger | Saleslady | Sweden |
| 10 | Martin Collins | 42 | Head | — | Ireland |
| 11 | Andrew Collins | 32 | Son | Detective | Illinois |
| 12 | Mary Collins | 31 | Daughter | Teacher | Illinois |
| 13 | Edward Murphy | 48 | Head | Meat Checker | Illinois |
| 14 | Florence Murphy | 44 | Wife | — | Illinois |
| 15 | John Murphy | 22 | Son | Secretary | Illinois |
| 16 | Mary Rose Murphy | 20 | Daughter | Receptionist | Illinois |
| 17 | James Murphy | 16 | Son | — | Illinois |
| 18 | William Murphy | 13 | Son | — | Illinois |
| 19 | Jack Murphy | 9 | Son | — | Illinois |
| 20 | Janette Munroe | 50 | Head | — | Illinois |
| 21 | Eileen Munroe | 16 | Daughter | — | Illinois |
| 22 | Deloris Munroe | 12 | Daughter | — | Illinois |
| 23 | Thomas Cussen | 33 | Son-in-law | Train Elevator | Illinois |
| 24 | Dorothy Cussen | 28 | Daughter | — | Illinois |
| 25 | John Phelan | 63 | Head | — | Ireland |
| 26 | Marie Phelan | 37 | Daughter | Stenographer | Illinois |
| 27 | Margaret Schubak | 39 | Daughter | — | Illinois |
| 28 | Adelle Schubak | 12 | Grand-dau | — | Illinois |
| 29 | John Schubak | 10 | Grand-son | — | Illinois |
| 30 | Leroy Blackburn | 61 | Head | Building Contractor | Ohio |
| 31 | Rose Blackburn | 63 | Wife | — | Ireland |
| 32 | John H. Burke | 44 | Head | Calendar | Illinois |
| 33 | Gertrude Burke | 41 | Wife | — | Illinois |
| 34 | Gertrude Burke | 18 | Daughter | — | Illinois |
| 35 | Betty Ann Burke | 17 | Daughter | — | Illinois |
| 36 | Eileen Burke | 15 | Daughter | — | Illinois |
| 37 | Joan Burke | 10 | Daughter | — | Illinois |
| 38 | August Ely | 66 | Father-in-law | Painting | Maryland |
| 39 | Gertrude Ely | 61 | Mother-in-law | — | Illinois |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 3 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)