JH
John Hendrickson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cowlitz-County, Washington
Our Model Tree links this John Hendrickson across the 1920, 1930 and 1940 US Censuses in Cowlitz-County, Washington (XGBoost, ~Confirmed), with identified parents Nels & Mary — first a head (b.~1902), then head of a 7-person household.
Age 38
b. ~1902
Male
Head
Born: Oregon
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cowlitz-County, Washington |
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Oregon |
| 1935 Residence (City) | Longview Rural |
| 1935 Residence (County) | Cowlitz |
| Additional Details | |
| Occupation | Longshoreman |
| Industry | Stevedoring |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Longshoreman |
| Township / Ward | Longview Rural |
| Est. Birth Year | ~1902 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elmer Hendrickson | Son | — | 11 | ~1929 |
| John Hendrickson | Head | — | 38 | ~1902 |
| Bessie Hendrickson | Daughter | — | 7 | ~1933 |
| Robert Hendrickson | Son | — | 7 | ~1933 |
| Ray Hendrickson | Son | — | 16 | ~1924 |
| Matilda Hendrickson | Spouse | — | 35 | ~1905 |
| Elsie Hendrickson | Daughter | — | 15 | ~1925 |
Census Appearances
1920
Cowlitz, Washington
Son, age 17
Cowlitz, Washington · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Fisherman |
| Industry | Columbia River |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1930
Cowlitz, Washington
Head, age 28
Cowlitz, Washington · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Oregon |
| Age at First Marriage | 21 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | Gen Farming |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Veteran | No |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Cowlitz-County, Washington
Head, age 38
Cowlitz-County, Washington · implied b. ~1902 — 7 household members
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Oregon |
| 1935 Residence (City) | Longview Rural |
| 1935 Residence (County) | Cowlitz |
| Occupation | Longshoreman |
| Industry | Stevedoring |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | No 6 |
| 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 John Hendrickson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Nels Hendrickson (~0.92 confidence) and mother Mary Hendrickson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Nels Hendrickson
b. ~1857
Source father
● Household
· direct · ~0.92
Mother
Mary Hendrickson
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hendrickson
Head · 1940 · age 38 · b. ~1902 · Washington
★ 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 — Cowlitz-County, Washington
Open full size
1940 US Federal Census — Cowlitz-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04336-00799)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Andrew Koski | 81 | Head | — | Finland |
| 2 | Josephine Koski | 64 | Wife | — | Finland |
| 3 | Hugo Koski | 49 | Son | — | Minnesota |
| 4 | Rudolph Pauilainen | 31 | Head | Farm Laborer | Oregon |
| 5 | Aili Pauilainen | 29 | Wife | — | Washington |
| 6 | Esther Pauilainen | 7 | Daughter | — | Washington |
| 7 | Ernest Pauilainen | 5 | Son | — | Washington |
| 8 | Elinor Pauilainen | 1 | Daughter | — | Washington |
| 9 | Edgar Zohner | 47 | Head | Farmer | Missouri |
| 10 | Clara Zohner | 46 | Wife | — | Ohio |
| 11 | Oscar Hendrickson | 34 | Head | Farmer | Oregon |
| 12 | Margaret Hendrickson | 36 | Wife | — | Finland |
| 13 | Melvin Hendrickson | 10 | Son | — | Washington |
| 14 | Arnold Hendrickson | 5 | Son | — | Washington |
| 15 | Bernice Hendrickson | 4 | Daughter | — | Washington |
| 16 | Kela Hendrickson | 83 | Head | — | Norway |
| 17 | Martin Hendrickson | 47 | Son | Fisherman | Oregon |
| 18 | Elsie Hendrickson | 27 | Daughter | — | Oregon |
| 19 | John Hendrickson THIS PERSON | 38 | Head | Longshoreman | Oregon |
| 20 | Matilda Hendrickson | 35 | Wife | — | Oregon |
| 21 | Ray Edward Hendrickson | 16 | Son | — | Oregon |
| 22 | Elsie Juanita Hendrickson | 15 | Daughter | — | Oregon |
| 23 | Elmer D Hendrickson | 11 | Son | — | Washington |
| 24 | Robert W Hendrickson | 7 | Son | — | Washington |
| 25 | Bessie E Hendrickson | 7 | Daughter | — | Washington |
| 26 | Thomas Coleburn | 45 | Head | Longshoreman | Oregon |
| 27 | Lucy Coleburn | 39 | Wife | — | Oregon |
| 28 | Warren Coleburn | 19 | Son | — | Washington |
| 29 | Delvin Coleburn | 16 | Son | — | Washington |
| 30 | Emil Carlson | 41 | Head | Fisherman | Finland |
| 31 | Esther Carlson | 33 | Wife | — | Rhode Island |
| 32 | Richard Carlson | 14 | Son | — | Oregon |
| 33 | Doris Jean Carlson | 7 | Daughter | — | Washington |
| 34 | Henry Kauppila | 81 | Head | Fisherman | Finland |
| 35 | Ben Risley | 47 | Head | Fisherman | Texas |
| 36 | Melville Everett Risley | 39 | Nephew | Locomotive Fireman | Oregon |
| 37 | May Risley | 37 | Wife | — | Washington |
| 38 | Beverly Risley | 15 | Daughter | — | Oregon |
| 39 | Barbara Risley | 5 | Daughter | — | Washington |
| 40 | Ernest Anderson | 44 | Head | Farmer | Washington |
Pedigree Summary
John
Gen 1 · 2 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)