MJ
Martin Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bayfield-County, Wisconsin
Our Model Tree links this Martin Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Bayfield-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 5-person household.
Age 66
b. ~1874
Male
Head
Born: Norway
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Bayfield-County, Wisconsin |
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Kelly Township |
| 1935 Residence (County) | Bayfield |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 80 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
| Occupation | Farming |
| Township / Ward | Kelly Township |
| Est. Birth Year | ~1874 |
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 Martin | Age | Birth yr |
|---|---|---|---|---|
| Martin Johnson | Head | — | 66 | ~1874 |
| Telmer Johnson | Son | — | 20 | ~1920 |
| Ralph Johnson | Son | — | 22 | ~1918 |
| Leif Johnson | Son | — | 24 | ~1916 |
| Lena Johnson | Spouse | — | 59 | ~1881 |
Census Appearances
1910
Marathon, Wisconsin
Head, age 37
Marathon, Wisconsin · implied b. ~1873 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Norway |
| Years Married | 9 |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | General Farm |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1920
Bayfield, Wisconsin
Head, age 46
Bayfield, Wisconsin · implied b. ~1874 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Norway |
| Year of Immigration | 1892 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Norway |
| Year of Naturalization | 1903 |
| Birthplace (normalized) | norway |
1930
Bayfield, Wisconsin
Head, age 56
Bayfield, Wisconsin · implied b. ~1874 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Norway |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Age at First Marriage | 24 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Mill Laborer |
| Industry | Lumber Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | O |
| Home Value / Rent | 4700 |
| Veteran | No |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1940
Bayfield-County, Wisconsin
Head, age 66
Bayfield-County, Wisconsin · implied b. ~1874 — 5 household members
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Kelly Township |
| 1935 Residence (County) | Bayfield |
| Naturalization Status | Naturalized |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 80 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Martin Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Martin Johnson
Head · 1940 · age 66 · b. ~1874 · 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 — Bayfield-County, Wisconsin
Open full size
1940 US Federal Census — Bayfield-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04458-00249)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter Strauman | 20 | son | Farm Hand | Wisconsin |
| 42 | Einar Heim | 35 | Head | Farming | Norway |
| 43 | Ray Larson | 27 | Head | Farming | Wisconsin |
| 44 | Reinhart Larson | 68 | Father | — | Sweden |
| 45 | Oliver Nelson | 57 | Lodger | Farm Hand | Norway |
| 46 | John Olson | 43 | Head | Time Keeper | Wisconsin |
| 47 | Christina Olson | 46 | Wife | — | Wisconsin |
| 48 | Evelyn Olson | 15 | Daughter | — | Wisconsin |
| 49 | Wilfred Olson | 14 | Son | — | Wisconsin |
| 50 | Elvera Olson | 7 | Daughter | — | Wisconsin |
| 51 | William Newman | 42 | Head | Carpenter | Wisconsin |
| 52 | Jane Newman | 37 | Wife | — | Michigan |
| 53 | Sheila Newman | 12 | Daughter | — | Wisconsin |
| 54 | Lois Newman | 8 | Daughter | — | Wisconsin |
| 55 | Ronald Newman | 5 | Son | — | Wisconsin |
| 56 | Charlotte Rappi | 81 | Mother in law | — | Finland |
| 57 | Oliver Newman | 44 | Head | Farming | Wisconsin |
| 58 | Elmer Newman | 33 | Brother | Farm Partner | Wisconsin |
| 59 | Anna Newman | 77 | Mother | — | Norway |
| 60 | Alphonse Klein | 29 | Head | Trucking | Minnesota |
| 61 | Amy Klein | 31 | Wife | — | Wisconsin |
| 62 | Klein | 7 | Daughter | — | Wisconsin |
| 63 | Carol Klein | 5 | Daughter | — | Wisconsin |
| 64 | Grace Klein | 1 | Daughter | — | Wisconsin |
| 65 | Martin Johnson THIS PERSON | 66 | Head | Farming | Norway |
| 66 | Lena Johnson | 59 | Wife | — | Norway |
| 67 | Leif Johnson | 24 | Son | Farm Hand | Wisconsin |
| 68 | Ralph Johnson | 22 | Son | Farm Hand | Wisconsin |
| 69 | Telmer Johnson | 20 | Son | Laborer | Wisconsin |
| 70 | Thoralf Herstad | 50 | Head | Farming | Iowa |
| 71 | Agnes Herstad | 56 | Wife | — | Michigan |
| 72 | Elva Marie Herstad | 17 | Daughter | — | Minnesota |
| 73 | Henning Herstad | 75 | Father | — | Norway |
| 74 | Lew Brown | 37 | Head | Farming | Wisconsin |
| 75 | Clementine Brown | 28 | Wife | — | Wisconsin |
| 76 | Fayrene Brown | 2 | Daughter | — | Wisconsin |
| 77 | Robert Weldon | 46 | Head | Pulp Cutter | Wisconsin |
| 78 | Harry Jensen | 54 | Head | Farming | Wisconsin |
| 79 | Clarence Jensen | 19 | Son | Farm Help | Wisconsin |
| 80 | John Nelson | 35 | Head | Farming | 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)