MJ
Martin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Chippewa-County, Wisconsin
Our Model Tree links this Martin Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Chippewa-County, Wisconsin (XGBoost, ~Confirmed), with identified parents Martha & John — first a head (b.~1901), then head of a 6-person household.
Age 39
b. ~1901
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Chippewa-County, Wisconsin |
| Surname | Johnson |
| Given Name | Martin J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Colburn Town |
| 1935 Residence (County) | Chippewa |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 77 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Farmer |
| Township / Ward | Colburn Town |
| Est. Birth Year | ~1901 |
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 Martin | Age | Birth yr |
|---|---|---|---|---|
| Cynthia Johnson | Daughter | — | 2 | ~1938 |
| Martin Johnson | Head | — | 39 | ~1901 |
| Nathan Johnson | Other | — | 71 | ~1869 |
| Mary Weeks | Other | — | 20 | ~1920 |
| William Johnson | Son | — | 9 | ~1931 |
| Ruth Johnson | Spouse | — | 36 | ~1904 |
Census Appearances
1910
Chippewa, Wisconsin
Son, age 10
Chippewa, Wisconsin · implied b. ~1900 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wisconsin |
| Industry | English |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1920
Chippewa, Wisconsin
Son, age 19
Chippewa, Wisconsin · implied b. ~1901 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wisconsin |
| Occupation | Laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | No |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Chippewa, Wisconsin
Son, age 29
Chippewa, Wisconsin · implied b. ~1901 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 27 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wisconsin |
| Occupation | Farm laborer |
| Industry | General Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Chippewa-County, Wisconsin
Head, age 39
Chippewa-County, Wisconsin · implied b. ~1901 — 6 household members
| Surname | Johnson |
| Given Name | Martin J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Colburn Town |
| 1935 Residence (County) | Chippewa |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 77 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 2 locations, using XGBoost record linkage. Identified parents: mother Martha Johnson (~0.92 confidence) and father John Johnson (~0.92 confidence) and mother Martha Johnson (~0.92 confidence) and father John Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Martha Johnson
b. ~1862
Source mother
● Household
· direct · ~0.92
Father
John Johnson
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Martha Johnson
b. ~1866
Source mother
● Household
· direct · ~0.92
Father
John Johnson
b. ~1870
Source father
● Household
· direct · ~0.92
This person
Anchor record
Martin Johnson
Head · 1940 · age 39 · b. ~1901 · Wisconsin
★ 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 — Chippewa-County, Wisconsin
Open full size
1940 US Federal Census — Chippewa-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04464-00531)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Floyd Sparkes | 24 | Son | — | Wisconsin |
| 42 | Phyllis Sparkes | 22 | Daughter | Teacher | Wisconsin |
| 43 | Mervin Sparkes | 62 | Brother | Farmer | Wisconsin |
| 44 | Lawrence Lanser | 37 | Head | Farmer | Wisconsin |
| 45 | Arleva Lanser | 29 | Wife | — | Wisconsin |
| 46 | La Verne Lanser | 1 | Son | — | Wisconsin |
| 47 | Joseph Chemelik | 54 | Head | Farmer | Czechoslovakia |
| 48 | Blanche Chemelik | 50 | Wife | — | Czechoslovakia |
| 49 | Joseph Chemelik | 23 | Son | Farmer | Wisconsin |
| 50 | Albert Chemelik | 20 | Son | Quarry Work | Wisconsin |
| 51 | Frank Kral | 51 | Head | Farmer | Czechoslovakia |
| 52 | Mary Kral | 53 | Wife | — | Illinois |
| 53 | Paul Kral | 20 | Son | Farmer | Wisconsin |
| 54 | Joseph Kysilko | 51 | Head | Farmer | Czechoslovakia |
| 55 | Frances Kysilko | 47 | Wife | — | Czechoslovakia |
| 56 | Margaret Kysilko | 20 | Daughter | — | Wisconsin |
| 57 | George Kysilko | 17 | Son | Farmer | Wisconsin |
| 58 | Joseph Nelson | 53 | Head | Farmer | Wisconsin |
| 59 | Selma Nelson | 46 | Wife | — | Minnesota |
| 60 | Florence Nelson | 21 | Daughter | Grade Teacher | Wisconsin |
| 61 | Joyce Nelson | 19 | Daughter | — | Wisconsin |
| 62 | Lenore Nelson | 16 | Son | — | Wisconsin |
| 63 | Emery Nelson | 11 | Son | — | Wisconsin |
| 64 | Theodore Nelson | 54 | Head | Chairman County | Wisconsin |
| 65 | Mabel Nelson | 49 | Wife | — | Wisconsin |
| 66 | Marvin Nelson | 20 | Son | — | Wisconsin |
| 67 | Morris Nelson | 15 | Son | — | Wisconsin |
| 68 | Escher Nelson | 13 | Daughter | — | Wisconsin |
| 69 | David Nelson | 8 | Son | — | Wisconsin |
| 70 | Kenneth Nelson | 23 | Head | Farmer | Wisconsin |
| 71 | Vera Nelson | 24 | Wife | — | Wisconsin |
| 72 | Martin J. Johnson THIS PERSON | 39 | Head | Farmer | Wisconsin |
| 73 | Ruth Johnson | 36 | Wife | — | Wisconsin |
| 74 | William Johnson | 9 | Son | — | Wisconsin |
| 75 | Cynthia Johnson | 2 | Daughter | — | Wisconsin |
| 76 | Nathan Johnson | 71 | Father | — | Wisconsin |
| 77 | Mary Weeks | 20 | Niece | — | Wisconsin |
| 78 | Elias Weeks | 64 | Head | Farmer | Norway |
| 79 | Anna Weeks | 62 | Wife | — | Norway |
| 80 | Leif W. Weeks | 24 | Son | Farmer | Wisconsin |
Pedigree Summary
Martin
Gen 1 · 4 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)