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John Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Flathead-County, Montana
Our Model Tree links this John Decker across the 1930 and 1940 US Censuses in Flathead-County, Montana (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 6-person household.
Age 51
b. ~1889
Male
Head
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Flathead-County, Montana |
| Surname | Decker |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Jocko Twp |
| 1935 Residence (County) | Flathead |
| Additional Details | |
| Occupation | Logger |
| Industry | Logging |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 908 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Logger |
| Township / Ward | Jocko Twp |
| Est. Birth Year | ~1889 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Donald Decker | Son | — | 14 | ~1926 |
| Joan Decker | Daughter | — | 7 | ~1933 |
| John Decker | Head | — | 51 | ~1889 |
| Ruth Decker | Spouse | — | 45 | ~1895 |
| Helen Decker | Daughter | — | 20 | ~1920 |
| John Decker | Son | — | 4 | ~1936 |
Census Appearances
1930
Flathead, Montana
Head, age 41
Flathead, Montana · implied b. ~1889 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | John A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 22 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Laborer |
| Industry | Woods |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 3 |
| Veteran | No |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Flathead-County, Montana
Head, age 51
Flathead-County, Montana · implied b. ~1889 — 6 household members
| Surname | Decker |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Jocko Twp |
| 1935 Residence (County) | Flathead |
| Occupation | Logger |
| Industry | Logging |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 908 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Decker across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Decker
Head · 1940 · age 51 · b. ~1889 · Montana
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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 — Flathead-County, Montana
Open full size
1940 US Federal Census — Flathead-County, Montana
Page Contents
30 people indexed on this census page (nara:1940:m-t0627-02219-00189)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert S. Radabah | 31 | son | Farmer | Montana |
| 2 | John A. Decker THIS PERSON | 51 | Head | Logger | Missouri |
| 3 | Ruth N. Decker | 45 | Wife | — | Mississippi |
| 4 | Helen Decker | 20 | daughter | Housemaid | Montana |
| 5 | Donald Decker | 14 | son | — | Montana |
| 6 | Joan Decker | 7 | daughter | — | Montana |
| 7 | John A. Jr. Decker | 4 | son | — | Montana |
| 8 | Mabel L. Phillips | 40 | Head | — | Minnesota |
| 9 | Sylvia H. Phillips | 19 | daughter | — | Minnesota |
| 10 | David V. Phillips | 18 | son | Helper | Minnesota |
| 11 | Ethel A. Phillips | 16 | daughter | — | Minnesota |
| 12 | Ruth G. Phillips | 14 | daughter | — | Montana |
| 13 | Warren L. Phillips | 13 | son | — | Montana |
| 14 | Carol M. Phillips | 11 | daughter | — | Montana |
| 15 | Emily A. Phillips | 9 | daughter | — | Montana |
| 16 | William Otto | 40 | Head | Stump Farm | So Dakota |
| 17 | Mary Otto | 28 | wife | — | Minnesota |
| 18 | Elmer R. Beeman | 34 | Head | Farmer | Montana |
| 19 | Hilda B. Beeman | 33 | wife | — | Montana |
| 20 | Barbara Jean Beeman | 8 | daughter | — | Montana |
| 21 | Paul Amundson | 43 | Head | Farmer | Minnesota |
| 22 | Eva M. Amundson | 30 | wife | — | Minnesota |
| 23 | Louise Amundson | 8 | daughter | — | Montana |
| 24 | Henry V. Amundson | 3 | son | — | Montana |
| 25 | Frank E. Lull | 44 | Head | Farmer | Minnesota |
| 26 | Opal F. Lull | 33 | wife | — | Montana |
| 27 | Eugene H. Lull | 16 | son | Farm Laborer | Montana |
| 28 | Arlene B. Lull | 15 | daughter | Helper On Farm | Montana |
| 29 | Delores L. Lull | 4 | daughter | — | Montana |
| 30 | Chris Hans Nelson | 47 | hired help | Laborer | Wisc |
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)