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Robert Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Larson across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
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 | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Zeigler |
| 1935 Residence (County) | Franklin |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Est. Birth Year | ~1925 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Mary Larson | Daughter | — | 21 | ~1919 |
| Harvey Curry | Other | — | 27 | ~1913 |
| Joseph Larson | Son | — | 13 | ~1927 |
| Lucille Larson | Daughter | — | 19 | ~1921 |
| Esther Larson | Spouse | — | 37 | ~1903 |
| Dan Curry | Other | — | 22 | ~1918 |
| Stewart Larson | Son | — | 18 | ~1922 |
| Robert Larson | Son | — | 15 | ~1925 |
| Joseph Larson | Head | — | 44 | ~1896 |
| Clara Curry | Other | — | 69 | ~1871 |
Census Appearances
1930
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 15
Cook-County, Illinois · implied b. ~1925 — 10 household members
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Zeigler |
| 1935 Residence (County) | Franklin |
| Class of Worker | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Illinois |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Larson
Son · 1940 · age 15 · b. ~1925 · Illinois
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Sibling
Stewart Larson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Larson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Larson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Larson
Sibling · 1940 · age 19
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
40 people indexed on this census page (nara:1940:m-t0627-00932-00557)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Foy, John Cook | 14 | Son | — | Illinois |
| 42 | Joseph H. Larson | 44 | Head | Watchman | England |
| 43 | Esther M. Larson | 37 | Wife | — | Sweden |
| 44 | Mary E. Larson | 21 | Daughter | Supply Clerk | Illinois |
| 45 | Lucille J. Larson | 19 | Daughter | Labeler | Illinois |
| 46 | Stewart L. Larson | 18 | Son | — | Illinois |
| 47 | Robert Larson THIS PERSON | 15 | Son | — | Illinois |
| 48 | Joseph Jr. Larson | 13 | Son | — | Illinois |
| 49 | Clara S. Curry | 69 | Mother-in-law | — | Illinois |
| 50 | Harvey G. Curry | 27 | Brother-in-law | Practical Nurse | England |
| 51 | Dan E. Curry | 22 | Brother-in-law | Apprentice | Ohio |
| 52 | Roy Matthews | 50 | Head | Plumber | Kansas |
| 53 | Susan Matthews | 48 | Wife | — | Illinois |
| 54 | Shirley Matthews | 14 | Daughter | — | Illinois |
| 55 | Minnie Matthews | 82 | Mother | — | Germany |
| 56 | Bertha Hills | 42 | Head | Maid | South Dakota |
| 57 | Mary L. Hills | 16 | Daughter | — | Tennessee |
| 58 | Della C. Hills | 15 | Daughter | — | Tennessee |
| 59 | Walter E. Hills | 13 | Son | — | Illinois |
| 60 | Arthur Hills | 8 | Son | — | Illinois |
| 61 | Henry Mullery | 66 | Head | Repairman | Germany |
| 62 | Dora Mullery | 63 | Wife | — | Germany |
| 63 | Otto Buckman | 31 | Roomer | Credit Clerk | Illinois |
| 64 | Mayme Moore | 38 | Roomer | Clerk | Illinois |
| 65 | Katherine Tement | 62 | Head | — | Austria |
| 66 | Bernard Tement | 30 | Son | Truck Driver | Illinois |
| 67 | Mary Scully | 65 | Sister | — | Ireland |
| 68 | George Cooper | 57 | Head | Foreman | Illinois |
| 69 | Maid Cooper | 56 | Wife | — | Sweden |
| 70 | Celina Fessler | 50 | Head | — | Illinois |
| 71 | Frank Heiner | 41 | Brother | Painter | Illinois |
| 72 | Theresa Heiner | 37 | Sister | — | Illinois |
| 73 | Patrick Carey | 64 | Head | Body Builder | Ireland |
| 74 | Julia Carey | 50 | Wife | — | Ireland |
| 75 | Patrick Carey | 26 | Son | Sales Clerk | Illinois |
| 76 | Dennis Carey | 24 | Son | Clerk | Illinois |
| 77 | Eileen Carey | 23 | Daughter | — | Illinois |
| 78 | Josephine Carey | 20 | Daughter | — | Illinois |
| 79 | Daniel Carey | 17 | Son | Barber Shop | Illinois |
| 80 | Lloyd Querenberg | 47 | Head | Auditor | Kentucky |
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)