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Jacob Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Iron-County, Wisconsin
Our Model Tree links this Jacob Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Iron-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 5-person household.
Age 70
b. ~1870
Male
Head
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Iron-County, Wisconsin |
| Surname | Johnson |
| Given Name | Jacob B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Town of Oma |
| 1935 Residence (County) | Iron |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | Town Of Oma |
| Est. Birth Year | ~1870 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Jacob | Age | Birth yr |
|---|---|---|---|---|
| Marie Johnson | Spouse | — | 63 | ~1877 |
| Jacob Johnson | Head | — | 70 | ~1870 |
| Fran Johnson | Son | — | 24 | ~1916 |
| Arne Johnson | Son | — | 19 | ~1921 |
| Toivo Johnson | Son | — | 22 | ~1918 |
Census Appearances
1910
Kings, New …
Head, age 40
Kings, New York · implied b. ~1870 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Jacob |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Finland |
| Years Married | 17 |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Carpenter Supt |
| Industry | Carpenter Shop |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1920
Luce, Michigan
Head, age 49
Luce, Michigan · implied b. ~1871
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Johnson |
| Given Name | Jacob |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Widowed |
| Birthplace | Finland |
| Year of Immigration | 1890 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Farmer |
| Industry | Home Farm |
| Class of Worker | OA |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Finnish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Finland |
| Year of Naturalization | 1893 |
| Birthplace (normalized) | finland |
1930
Iron, Wisconsin
Head, age 59
Iron, Wisconsin · implied b. ~1871 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Jacob |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Age at First Marriage | 27 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Farmer |
| Industry | Dairy |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Home Owned/Rented | O |
| Home Value / Rent | 1100 |
| Veteran | No |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Iron-County, Wisconsin
Head, age 70
Iron-County, Wisconsin · implied b. ~1870 — 5 household members
| Surname | Johnson |
| Given Name | Jacob B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Town of Oma |
| 1935 Residence (County) | Iron |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Jacob Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 4 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Jacob Johnson
Head · 1940 · age 70 · b. ~1870 · Wisconsin
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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 — Iron-County, Wisconsin
Open full size
1940 US Federal Census — Iron-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04484-00267)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Saari | 24 | Head | Truck-Driver | Wisconsin |
| 42 | Anne Saari | 24 | Wife | — | Wisconsin |
| 43 | Joyce Saari | 0 | Daughter | — | Wisconsin |
| 44 | Peter Haapa | 61 | Head | — | Finland |
| 45 | Lydia Haapa | 30 | Daughter | — | Wisconsin |
| 46 | Sylvia Haapa | 26 | Daughter | — | Wisconsin |
| 47 | Victor Haapa | 24 | Son | Hookman Yardman | Wisconsin |
| 48 | Matt Sorvari | 65 | Head | — | Finland |
| 49 | Sanni Sorvari | 64 | Wife | — | Finland |
| 50 | Eli Sorvari | 40 | Head | Truck-Driver | Finland |
| 51 | Lillian Sorvari | 38 | Wife | — | Wisconsin |
| 52 | Harold Sorvari | 16 | Son | — | Wisconsin |
| 53 | Ruth Sorvari | 10 | Daughter | — | Wisconsin |
| 54 | Thomas Sorvari | 7 | Son | — | Wisconsin |
| 55 | Robert Sorvari | 3 | Son | — | Wisconsin |
| 56 | Paul Yuntunen | 45 | Head | Bus Driver | Finland |
| 57 | Sophie Yuntunen | 36 | Wife | — | Michigan |
| 58 | Kenneth Yuntunen | 15 | Son | — | Michigan |
| 59 | Betty Ann Yuntunen | 4 | Daughter | — | Michigan |
| 60 | Theodore Yuntunen | 1 | Son | — | Michigan |
| 61 | Jacob B. Johnson THIS PERSON | 70 | Head | — | Finland |
| 62 | Marie J. Johnson | 63 | Wife | — | Finland |
| 63 | Fran Johnson | 24 | Son | Sawyer | Wisconsin |
| 64 | Toivo Johnson | 22 | Son | Sawyer | Wisconsin |
| 65 | Arne Johnson | 19 | Son | Laborer | Wisconsin |
| 66 | Charles Siirila | 57 | Head | Sawyer | Finland |
| 67 | Sanni Siirila | 57 | Wife | — | Finland |
| 68 | John T. Siirila | 20 | Son | Laborer | Wisconsin |
| 69 | Sylvia Siirila | 19 | Daughter | Assistant Teacher | Wisconsin |
| 70 | Vienna Siirila | 16 | Daughter | — | Wisconsin |
| 71 | Herman Hill | 62 | Head | — | Finland |
| 72 | Jacob Haapa | 67 | Head | — | Finland |
| 73 | Nick Laho | 68 | Head | — | Finland |
| 74 | Amanda Laho | 58 | Wife | — | Finland |
| 75 | Eila Laho | 18 | Daughter | Assistant | Wisconsin |
| 76 | Violet Laho | 16 | Daughter | — | Wisconsin |
| 77 | Frank Maki | 57 | Head | Repair Man | Finland |
| 78 | Urho Hintsa | 57 | Head | Cutting Wood | Finland |
| 79 | George De Marth | 28 | Head | Teamster | Wisconsin |
| 80 | Marie De Marth | 28 | Wife | — | Wisconsin |
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)