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John Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clackamas-County, Oregon
Our Model Tree links this John Olsen across the 1920, 1930 and 1940 US Censuses in Clackamas-County, Oregon (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 3-person household.
Age 58
b. ~1882
Male
Head
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clackamas-County, Oregon |
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Oswego city |
| 1935 Residence (County) | Clackamas |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Lawyer |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 42 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Occupation | Lawyer |
| Township / Ward | Oswego City |
| Est. Birth Year | ~1882 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Olsen | Spouse | — | 57 | ~1883 |
| John Olsen | Son | — | 22 | ~1918 |
| John Olsen | Head | — | 58 | ~1882 |
Census Appearances
1920
Multnomah, Oregon
Head, age 38
Multnomah, Oregon · implied b. ~1882 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1906 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Lawyer |
| Industry | General Practice |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Denmark |
| Year of Naturalization | 1915 |
| Birthplace (normalized) | denmark |
1930
Multnomah, Oregon
Head, age 47
Multnomah, Oregon · implied b. ~1883
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | Naturalized |
| Year of Immigration | 1899 |
| Age at First Marriage | 30 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Lawyer |
| Industry | Private practice |
| Class of Worker | O |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | R |
| Home Value / Rent | 30.00 |
| Veteran | No |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
Clackamas-County, Oregon
Head, age 58
Clackamas-County, Oregon · implied b. ~1882 — 3 household members
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Oswego city |
| 1935 Residence (County) | Clackamas |
| Naturalization Status | Naturalized |
| Occupation | Lawyer |
| Industry | Private Practice |
| Class of Worker | OA |
| Hours Worked | 42 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| 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 58 · b. ~1882 · Oregon
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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 — Clackamas-County, Oregon
Open full size
1940 US Federal Census — Clackamas-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03355-00471)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ivy Ivy | 32 | Wife | — | Massachusetts |
| 2 | Louise Ivy | 14 | Daughter | — | Oregon |
| 3 | Blanche L. Ivy | 12 | Daughter | — | Oregon |
| 4 | Alfred M. Mcmillan | 32 | Head | Teacher | Oregon |
| 5 | Gloria H. Mcmillan | 26 | Wife | — | Oregon |
| 6 | Sharon G. Mcmillan | 2 | Daughter | — | Oregon |
| 7 | Warren W. Bufford | 39 | Head | Back-Tier | Wisconsin |
| 8 | Emma Bufford | 31 | Wife | Housekeeper | North Dakota |
| 9 | Woodard A. Bufford | 11 | Son | — | North Dakota |
| 10 | Esther Lund | 55 | Head | Social Worker | Michigan |
| 11 | John Olsen THIS PERSON | 58 | Head | Lawyer | Denmark |
| 12 | Margaret M. Olsen | 57 | Wife | — | Oregon |
| 13 | John Olsen | 22 | Son | Mechanic | Oregon |
| 14 | Harmon A. Marshall | 43 | Head | Publisher | South Dakota |
| 15 | Vina E. Marshall | 40 | Wife | — | South Dakota |
| 16 | Donald A. Marshall | 17 | Son | — | South Dakota |
| 17 | Charles A. Marshall | 13 | Son | — | South Dakota |
| 18 | Harmon A. Marshall | 11 | Son | — | South Dakota |
| 19 | Frank M. Jones | 45 | Head | — | Kansas |
| 20 | Laura M. Jones | 75 | Mother | — | West Virginia |
| 21 | Ernest J. Duis | 48 | Head | City Recorder And General Superintendent | Nebraska |
| 22 | Alice G. Duis | 50 | Wife | — | Nebraska |
| 23 | Gertrude E. Duis | 19 | Daughter | Bookkeeper | Illinois |
| 24 | Harlo R. Vose | 34 | Head | Gardener | Michigan |
| 25 | Sybil D. D. Vose | 31 | Wife | — | Oregon |
| 26 | Barbara A. Vose | 7 | Daughter | — | Oregon |
| 27 | Ezra A. Tudor | 64 | Head | — | Ohio |
| 28 | Bessie M. Tudor | 53 | Wife | — | Oregon |
| 29 | Charles B. Miller | 78 | Father-in-law | — | Oregon |
| 30 | Carl L. Stanley | 61 | Head | Dentist | South Dakota |
| 31 | May E. Stanley | 52 | Wife | — | Illinois |
| 32 | Augusta B. Baker | 68 | Head | — | Missouri |
| 33 | Lyle A. Baker | 36 | Son | Laborer | Oregon |
| 34 | Herman H. Baker | 28 | Son | Truck Driver | Oregon |
| 35 | Katherine Baker | 25 | Daughter | — | Oregon |
| 36 | Thomas E. Hughes | 60 | Head | — | Iowa |
| 37 | Alice E. Hughes | 61 | Wife | — | Oregon |
| 38 | Charles H. Mcfarran | 54 | Head | Laborer | Washington |
| 39 | Olive G. Mcfarran | 35 | Daughter | Waitress | Washington |
| 40 | Helen P. Mcfarran | 15 | Grand-daughter | — | Oregon |
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)