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John Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Olsen across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1894), then head of a 4-person household.
Age 46
b. ~1894
Male
Head
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Mill Lumber |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2236 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Occupation | Carpenter |
| Township / Ward | Chicago |
| Est. Birth Year | ~1894 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Lillie Olsen | Daughter | — | 12 | ~1928 |
| Paul Olsen | Son | — | 14 | ~1926 |
| Ellen Olsen | Spouse | — | 47 | ~1893 |
| John Olsen | Head | — | 46 | ~1894 |
Census Appearances
1920
Cook, Illinois
Head, age 25
Cook, Illinois · implied b. ~1895 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1910 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Millwright |
| Industry | Foundry Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | R |
| Birth Country | Denmark |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | denmark |
1930
Cook, Illinois
Head, age 40
Cook, Illinois · implied b. ~1890 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | John O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | Naturalized |
| Year of Immigration | 1908 |
| Age at First Marriage | 24 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Tool Maker |
| Industry | Printing Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | O |
| Home Value / Rent | 8000 |
| Radio Set | R |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
Cook-County, Illinois
Head, age 46
Cook-County, Illinois · implied b. ~1894 — 4 household members
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Carpenter |
| Industry | Mill Lumber |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2236 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
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 John Olsen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Olsen
Head · 1940 · age 46 · b. ~1894 · 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-t0627-00993-00398)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Wanielista | 66 | Head | — | Poland |
| 42 | Amelia Wanielista | 54 | Wife | Hand Sewer | Poland |
| 43 | John Wanielista | 34 | Son | Loader | Illinois |
| 44 | Clara Prange | 53 | Head | — | Illinois |
| 45 | Loraine Prange | 32 | Daughter | Secretary | Illinois |
| 46 | Wilbur Prange | 27 | Son | Bank Clerk | Illinois |
| 47 | Frank Riedel | 43 | Head | Asst. Mgr. Dept. | W. Virginia |
| 48 | Virginia Riedel | 35 | Wife | — | W. Virginia |
| 49 | Alga Riedel | 15 | Daughter | — | W. Virginia |
| 50 | Dorothy Riedel | 12 | Daughter | — | Illinois |
| 51 | Margaret Riedel | 11 | Daughter | — | Illinois |
| 52 | Frank Jr. Riedel | 8 | Son | — | Illinois |
| 53 | Mary Louise Riedel | 7 | Daughter | — | Illinois |
| 54 | Barbara Ann Riedel | 1 | Daughter | — | Illinois |
| 56 | Constance M. Glenn | 57 | Head | Housework | Illinois |
| 57 | Edward Glenn | 30 | Son | General Work | Illinois |
| 58 | Paul G. Glenn | 22 | Son | Body Man | Illinois |
| 59 | Ralph J. Glenn | 18 | Son | Office Boy | Illinois |
| 60 | Emma Nearity | 51 | Head | — | Illinois |
| 61 | John Olsen THIS PERSON | 46 | Head | Carpenter | Denmark |
| 62 | Ellen Olsen | 47 | Wife | — | Denmark |
| 63 | Paul Olsen | 14 | Son | — | Nebraska |
| 64 | Lillie Olsen | 12 | Daughter | — | Illinois |
| 65 | Chris P. Andreasen | 49 | Head | Store Repairman | Illinois |
| 66 | Hilda Andreasen | 44 | Wife | — | Pennsylvania |
| 67 | Helen Andreasen | 17 | Daughter | Telephone Operator | Illinois |
| 68 | Charles Jones | 62 | Head | Handyman | New York |
| 69 | Hannah Jones | 62 | Wife | — | Norway |
| 70 | Joseph Hodes | 32 | Head | Sheet Metal | W. Virginia |
| 71 | Mary Hodes | 26 | Wife | — | Illinois |
| 72 | Fred Nagel | 29 | Head | Ins. Agent | Illinois |
| 73 | Bessie R. Nagel | 29 | Wife | — | Wisconsin |
| 74 | Roman Szcytowski | 53 | Head | Baker | Poland |
| 75 | Helen Szcytowski | 52 | Wife | — | Poland |
| 76 | Isabella Szcytowski | 26 | Daughter | Steno-Bookkeeper | Illinois |
| 77 | Celia Szcytowski | 21 | Daughter | Office Clerk | Illinois |
| 78 | Kasimir Stankoski | 69 | Boarder | Factory Worker | Poland |
| 79 | Arthur Pick | 34 | Head | Postal Clerk | Illinois |
| 80 | Julia Pick | 39 | Wife | — | 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)