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Louis Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Louis Larson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1863), then head of a 5-person household.
Age 77
b. ~1863
Male
Head
Born: Norway
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larson |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
| Township / Ward | Chicago |
| Est. Birth Year | ~1863 |
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 Louis | Age | Birth yr |
|---|---|---|---|---|
| Mary Larson | Spouse | — | 77 | ~1863 |
| Louis Larson | Head | — | 77 | ~1863 |
| William Garney | Other | — | 69 | ~1871 |
| George Garney | Other | — | 75 | ~1865 |
| Catherine Larson | Daughter | — | 42 | ~1898 |
Census Appearances
1920
Cook, Illinois
Head, age 57
Cook, Illinois · implied b. ~1863 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Norway |
| Year of Immigration | 1887 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Manager |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | R |
| Birth Country | Norway |
| Year of Naturalization | 1892 |
| Birthplace (normalized) | norway |
1930
Cook, Illinois
Head, age 67
Cook, Illinois · implied b. ~1863 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Norway |
| Naturalization Status | Naturalized |
| Year of Immigration | 1882 |
| Age at First Marriage | 21 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | O |
| Home Value / Rent | 15000 |
| Radio Set | R |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1940
Cook-County, Illinois
Head, age 77
Cook-County, Illinois · implied b. ~1863 — 5 household members
| Surname | Larson |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 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 Louis Larson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Louis Larson
Head · 1940 · age 77 · b. ~1863 · 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-t0627-00994-00772)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Margaret Bryant | 82 | Mother | — | Canada |
| 42 | Alva E. Stewart | 55 | Cousin | Structural Eng | Illinois |
| 43 | Robert Pacelli | 44 | Head | Project Accountant | Illinois |
| 44 | Lena Pacelli | 45 | Wife | — | Illinois |
| 45 | Lorraine Pacelli | 15 | Daughter | — | Illinois |
| 46 | John Foley | 44 | Head | Police Officer | Illinois |
| 47 | Mary Foley | 21 | Wife | Public School Teacher | Illinois |
| 48 | John Foley | 21 | Son | Bill Delivery | Illinois |
| 49 | Carl Wold | 50 | Head | Painter & Decorator | Norway |
| 50 | Sophia Wold | 45 | Wife | — | Norway |
| 51 | Carl Jr. Wold | 24 | Son | Truck Driver | Illinois |
| 52 | Joseph Moorhead | 70 | Head | Bookbinding | Illinois |
| 53 | Anne C. Moorhead | 64 | Wife | — | Illinois |
| 54 | Alice L. Moorhead | 30 | Daughter | Clerk | Illinois |
| 55 | Timothy Hannafan | 49 | Head | Inspector | Iowa |
| 56 | Louise Hannafan | 45 | Wife | — | Iowa |
| 57 | Margaret Hannafan | 21 | Daughter | Clerical Worker | Illinois |
| 58 | William Hannafan | 16 | Son | — | Illinois |
| 59 | Patricia Hannafan | 14 | Daughter | — | Illinois |
| 60 | Joseph M. Ichiarone | 39 | Head | Physician & Surgeon | New York |
| 61 | Rose Ichiarone | 37 | Wife | — | Illinois |
| 62 | Geraldine Ichiarone | 9 | Daughter | — | Illinois |
| 63 | Beverley Ichiarone | 3 | Daughter | — | Illinois |
| 64 | Stella Koch | 21 | Housekeeper | Housekeeper | Illinois |
| 65 | Robert M. O'Connor | 35 | Head | Pay-Master | Illinois |
| 66 | Helen O'Connor | 32 | Wife | — | Illinois |
| 67 | Robert M. O'Connor | 9 | Son | — | Illinois |
| 68 | Mary Louise O'Connor | 3 | Daughter | — | Illinois |
| 69 | Martha Martin | 68 | Mother-Law | — | Ireland (North) |
| 70 | Leo Page | 41 | Head | Pipeman | Illinois |
| 71 | Walter Page | 36 | Brother | Policeman | Illinois |
| 72 | Bernadette Page | 35 | Sister-Law | — | Illinois |
| 73 | Virginia Page | 13 | Niece | — | Illinois |
| 74 | Thomas M. Page | 39 | Cousin | Laborer | Ireland |
| 75 | Louis Larson THIS PERSON | 77 | Head | — | Norway |
| 76 | Mary Larson | 77 | Wife | — | Michigan |
| 77 | Catherine Larson | 42 | Daughter | — | Michigan |
| 78 | George Garney | 75 | Brother-Law | — | Michigan |
| 79 | William Garney | 69 | Brother-Law | Maintenance Man | Michigan |
| 80 | Irwin Cohen | 49 | Head | Salesman | New York |
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)