DJ
David Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Clackamas-County, Oregon
Our Model Tree links this David Johnson across the 1920, 1930 and 1940 US Censuses in Clackamas-County, Oregon (XGBoost, ~Confirmed), with identified parents Alfred & Clifford — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clackamas-County, Oregon |
| Surname | Johnson |
| Given Name | David C |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Oswego |
| 1935 Residence (County) | Clackamas |
| Additional Details | |
| Occupation | deck hand |
| Industry | freight boat |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1020 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Deck Hand |
| Township / Ward | Oswego |
| Est. Birth Year | ~1919 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Virginia Johnson | Daughter | — | 16 | ~1924 |
| Clifford Johnson | Head | — | 48 | ~1892 |
| Mariel Buffum | Other | — | 46 | ~1894 |
| James Johnson | Son | — | 12 | ~1928 |
| David Johnson | Son | — | 21 | ~1919 |
| Etta Johnson | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Clackamas, Oregon
Son, age 1
Clackamas, Oregon · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Oregon |
| Mother's Birthplace | California |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1930
Clackamas, Oregon
Son, age 12
Clackamas, Oregon · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | David C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Oregon |
| Mother's Birthplace | California |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Clackamas-County, Oregon
Son, age 21
Clackamas-County, Oregon · implied b. ~1919 — 6 household members
| Surname | Johnson |
| Given Name | David C |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Oswego |
| 1935 Residence (County) | Clackamas |
| Occupation | deck hand |
| Industry | freight boat |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1020 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 David Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alfred Johnson (~0.92 confidence) and father Clifford Johnson (~0.92 confidence) and mother Ella Johnson (~0.92 confidence) and mother Etta Johnson (~0.92 confidence) and father Clifford Johnson (~0.92 confidence) and mother Elsa Johnson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alfred Johnson
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Clifford Johnson
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Ella Johnson
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Etta Johnson
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Clifford Johnson
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Elsa Johnson
b. ~1900
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Johnson
Son · 1940 · age 21 · b. ~1919 · Oregon
★ You are viewing this record
Sibling
James Johnson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Johnson
Sibling · 1940 · age 16
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 — 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-t0627-03355-00482)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Luella Wirty | 66 | wife | — | Michigan |
| 42 | Edwin A Pinkham | 32 | head | Teacher | Maine |
| 43 | Marjorie S Pinkham | 32 | wife | Teacher | Missouri |
| 44 | David L Pinkham | 1 | son | — | Oregon |
| 45 | Thomas R Knight | 72 | head | Laborer | Ohio |
| 46 | Minnie L Knight | 63 | wife | — | Oregon |
| 47 | Anola J Howell | 89 | father-in-law | — | Kentucky |
| 48 | Lydie Lytle | 27 | daughter | Milliner | Oregon |
| 49 | Iona M Thomas | 82 | head | — | Oregon |
| 50 | David K Dalzell | 53 | head | Electrician | Michigan |
| 51 | Kathryn T Dalzell | 53 | wife | — | New York |
| 52 | Cathleen M Dalzell | 15 | daughter | — | Oregon |
| 53 | H. J. Fox | 50 | head | Foreman | Ohio |
| 54 | Thomas J Fox | 23 | nephew | Clinker | Oregon |
| 55 | Edna Fogarty | 40 | housekeeper | Housekeeper | Washington |
| 56 | Clifford Johnson | 48 | head | Truck Driver | Oregon |
| 57 | Etta A Johnson | 48 | wife | — | California |
| 58 | David C Johnson THIS PERSON | 21 | son | Deck Hand | Oregon |
| 59 | Virginia Johnson | 16 | daughter | Housekeeper | Oregon |
| 60 | James W Johnson | 12 | son | — | Oregon |
| 61 | Mariel Buffum | 46 | lodger | Domestic | Oregon |
| 62 | Edgar J Coate | 54 | head | Farm Work | Pennsylvania |
| 63 | Jack O'Connell | 51 | head | Truck Work | New York |
| 64 | Pat L Farmer | 46 | head | Stone Mason | Missouri |
| 65 | Clara J Farmer | 43 | wife | Cook | Missouri |
| 66 | Ruth C Farmer | 19 | daughter | — | Oregon |
| 67 | Nadine A Farmer | 17 | daughter | — | Oregon |
| 68 | Glennis Farmer | 5 | daughter | — | Oregon |
| 69 | Clarence L Ekholm | 52 | head | Order Clerk | Minnesota |
| 70 | Alma I Ekholm | 47 | wife | — | Oregon |
| 71 | Roy E Pyke | 36 | head | Laborer | Michigan |
| 72 | Alida Pyke | 36 | wife | — | Texas |
| 73 | John J O'Brien | 31 | head | Construction | Free State |
| 74 | Fred J Bent | 35 | head | Shipping Clerk | Michigan |
| 75 | Eva M Bent | 34 | wife | Charwoman | Ohio |
| 76 | Richard Bent | 10 | son | Deliveries | Oregon |
| 77 | Robert Bent | 11 | son | — | Oregon |
| 78 | Chas. L Clenefelter | 51 | head | Inspector | Oregon |
| 79 | Mary A Clenefelter | 44 | wife | — | Oregon |
| 80 | Clarence W Dietrich | 36 | head | Sheet Metal Work | Washington |
Pedigree Summary
David + 2 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
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)