JJ
John Jacobson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · King-County, Washington
Our Model Tree links this John Jacobson across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 7-person household.
Age 57
b. ~1883
Male
Head
Born: Norway
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Jacobson |
| Given Name | John O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Precinct Vashon |
| 1935 Residence (County) | King |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Grader Operator |
| Industry | Co Road Work |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
| Occupation | Grader Operator |
| Township / Ward | Precinct Vashon |
| Est. Birth Year | ~1883 |
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 |
|---|---|---|---|---|
| John Jacobson | Head | — | 57 | ~1883 |
| Julius Jacobson | Son | — | 27 | ~1913 |
| Garfield Jacobson | Son | — | 19 | ~1921 |
| Ida Jacobson | Daughter | — | 22 | ~1918 |
| Otto Jacobson | Son | — | 21 | ~1919 |
| Gustave Jacobson | Son | — | 24 | ~1916 |
| Gudrun Jacobson | Spouse | — | 52 | ~1888 |
Census Appearances
1920
King, Washington
Other, age 35
King, Washington · implied b. ~1885 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Norway |
| Year of Immigration | 1902 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Fireman |
| Industry | Steam Ship |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1930
King, Washington
Head, age 48
King, Washington · implied b. ~1882 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Norway |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 31 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | O |
| Home Value / Rent | 3500 |
| Radio Set | No |
| Veteran | Yes |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1940
King-County, Washington
Head, age 57
King-County, Washington · implied b. ~1883 — 7 household members
| Surname | Jacobson |
| Given Name | John O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Precinct Vashon |
| 1935 Residence (County) | King |
| Naturalization Status | Naturalized |
| Occupation | Grader Operator |
| Industry | Co Road Work |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
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 Jacobson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Jacobson
Head · 1940 · age 57 · b. ~1883 · 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 — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04346-00804)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frederica D. Boyer | 69 | Head | Nurse | Wisconsin |
| 2 | Bingham Baxter | 81 | Head | — | Ohio |
| 3 | Sena Johnson | 53 | Head | Housekeeper | Norway |
| 4 | Francis Johnson | 55 | Boarder | — | Illinois |
| 5 | Rasmus H. Vick | 54 | Boarder | — | Norway |
| 6 | Mike Dozor | 45 | Boarder | — | Poland |
| 7 | Joseph D. Smith | 73 | Boarder | — | Pennsylvania |
| 8 | John Rye | 78 | Boarder | — | Norway |
| 9 | Ureams A. Carruthers | 85 | Boarder | — | Ohio |
| 10 | Norman P. Swain | 63 | Boarder | — | Ohio |
| 11 | Robert J. Gordon | 72 | Boarder | — | New York |
| 12 | Charles M. Ehealy | 67 | Boarder | — | Wisconsin |
| 13 | John Bjorlo | 53 | Boarder | — | Norway |
| 14 | Edward Jarvinen | 25 | Servant | Cooks Helper | Washington |
| 15 | Ray Du Bois | 60 | Boarder | — | Michigan |
| 16 | William Resterman | 73 | Boarder | — | Ohio |
| 17 | Walter Chapman | 62 | Boarder | — | Nebraska |
| 18 | Charles A. Minser | 54 | Boarder | — | Oregon |
| 19 | James R. Winston | 82 | Boarder | — | Oregon |
| 20 | Homer G. Dean | 81 | Boarder | — | Ohio |
| 21 | Carl Larson | 62 | Boarder | — | Norway |
| 22 | Ernest Lumberg | 57 | Boarder | — | Sweden |
| 23 | Mode Hulenk | 64 | Boarder | — | Iowa |
| 24 | George W. Pinel | 82 | Boarder | — | Canada |
| 25 | James Burton | 68 | Boarder | — | Iowa |
| 26 | Alonzo Ogle | 78 | Boarder | — | Oregon |
| 27 | O. G. Molend | 57 | Hired Man | Laborer | Norway |
| 28 | Jack Collier | 44 | Head | Civil Engineer | Montana |
| 29 | Mabel A. Collier | 37 | Wife | Seamstress | Montana |
| 30 | Constance R. Collier | 13 | Daughter | — | Washington |
| 31 | Geraldine L. Collier | 11 | Daughter | — | Washington |
| 32 | Gregory G. Collier | 5 | Son | — | Washington |
| 33 | Charles J. Walters | 76 | Head | Building Contractor | Illinois |
| 34 | John O. Jacobson THIS PERSON | 57 | Head | Grader Operator | Norway |
| 35 | Gudrun Jacobson | 52 | Wife | — | Norway |
| 36 | Julius A. Jacobson | 27 | Son | — | North Dakota |
| 37 | Gustave A. Jacobson | 24 | Son | — | North Dakota |
| 38 | Ida J. Jacobson | 22 | Daughter | — | North Dakota |
| 39 | Otto J. Jacobson | 21 | Son | — | North Dakota |
| 40 | Garfield S. Jacobson | 19 | Son | Carpenter | North Dakota |
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)