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John Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Multnomah-County, Oregon
Our Model Tree links this John Olsen across the 1930 and 1940 US Censuses in Multnomah-County, Oregon (XGBoost, ~Confirmed) — first a son (b.~1916), then head of a 11-person household.
Age 24
b. ~1916
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Multnomah-County, Oregon |
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Riverdale Precinct 434 |
| 1935 Residence (County) | Multnomah |
| Additional Details | |
| Occupation | gardener |
| Industry | private home |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Gardener |
| Township / Ward | Riverdale Precinct 434 |
| Est. Birth Year | ~1916 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| J Olsen | Head | — | 57 | ~1883 |
| Ruth Olsen | Daughter | — | 17 | ~1923 |
| John Olsen | Son | — | 24 | ~1916 |
| Elliot Olsen | Son | — | 26 | ~1914 |
| Tommy Olsen | Son | — | 11 | ~1929 |
| Dan Olsen | Son | — | 13 | ~1927 |
| Edna Kent | Other | — | 44 | ~1896 |
| David Olsen | Son | — | 9 | ~1931 |
| Clayton Olsen | Son | — | 29 | ~1911 |
| Bruce Olsen | Son | — | 15 | ~1925 |
| Nancy Olsen | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Multnomah, Oregon
Son, age 14
Multnomah, Oregon · implied b. ~1916 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Norway |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Multnomah-County, Oregon
Son, age 24
Multnomah-County, Oregon · implied b. ~1916 — 11 household members
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Riverdale Precinct 434 |
| 1935 Residence (County) | Multnomah |
| Occupation | gardener |
| Industry | private home |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Olsen
Son · 1940 · age 24 · b. ~1916 · Oregon
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Sibling
Nancy Olsen
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Olsen
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Tommy Olsen
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clayton Olsen
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Olsen
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bruce Olsen
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dan Olsen
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elliot Olsen
Sibling · 1940 · age 26
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 — Multnomah-County, Oregon
Open full size
1940 US Federal Census — Multnomah-County, Oregon
Page Contents
33 people indexed on this census page (nara:1940:m-t0627-03377-00586)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alex Martin | 54 | Head | Overhead Door | England |
| 42 | Helena Martin | 48 | Wife | — | Scotland |
| 43 | Macgregor Martin | 19 | Son | — | Oregon |
| 44 | E. Charles Rawlinson | 40 | Head | Public Accountant | England |
| 45 | Dorothea Rawlinson | 42 | Wife | — | England |
| 46 | Peter Rawlinson | 12 | Son | — | Oregon |
| 47 | M. Rosemary Rawlinson | 10 | Daughter | — | Oregon |
| 48 | John Rawlinson | 7 | Son | — | Oregon |
| 49 | J. Fred Olsen | 57 | Head | Supt. Landscape | Norway |
| 50 | Clayton Olsen | 29 | Son | Gardener | California |
| 51 | Elliot Olsen | 26 | Son | Credit Mgr. | Wisconsin |
| 52 | John Olsen THIS PERSON | 24 | Son | Gardener | Wisconsin |
| 53 | Ruth Olsen | 17 | Daughter | — | Portland |
| 54 | Bruce Olsen | 15 | Son | — | Portland |
| 55 | Dan Olsen | 13 | Son | — | Oregon |
| 56 | Tommy Olsen | 11 | Son | — | Portland |
| 57 | David Olsen | 9 | Son | — | Portland |
| 58 | Nancy Olsen | 7 | Daughter | — | Portland |
| 59 | Edna Kent | 44 | Servant | Housekeeper | Wisconsin |
| 60 | L. James Conlley | 60 | Head | Attorney | Illinois |
| 61 | E. Jane Conlley | 57 | Wife | — | Minnesota |
| 62 | Elizabeth Conlley | 18 | Daughter | — | Oregon |
| 63 | Harriet Conlley | 18 | Daughter | — | Oregon |
| 64 | Helen Leonard | 47 | Sister-in-law | Director | California |
| 65 | Jean Le Gall | 17 | Servant | Servant | Washington |
| 66 | J. Mortimer Hartwell | 54 | Head | Manager | Rhode Island |
| 67 | Barbara Hartwell | 47 | Wife | — | Oregon |
| 68 | Victoria Hartwell | 19 | Daughter | — | Oregon |
| 69 | Jane Hartwell | 15 | Daughter | — | Oregon |
| 70 | Thomas Hartwell | 12 | Son | — | Oregon |
| 71 | Mortimer Hartwell | 12 | Son | — | Oregon |
| 72 | J. Haines Bartlett | 76 | Father-in-law | — | New Hampshire |
| 73 | Viola Bickel | 17 | Servant | Maid | 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)