MJ
Martin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dickinson-County, Iowa
Our Model Tree links this Martin Johnson across the 1920, 1930 and 1940 US Censuses in Dickinson-County, Iowa (XGBoost, ~Confirmed), with identified parents Christina & Peter — first a head (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Dickinson-County, Iowa |
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Lloyd Township |
| 1935 Residence (County) | Dickinson |
| Additional Details | |
| Occupation | farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Lloyd Township |
| Est. Birth Year | ~1908 |
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 | — | 32 | ~1908 |
| Gayland Johnson | Son | — | 5 | ~1935 |
| Ronald Johnson | Son | — | 4 | ~1936 |
| Philip Johnson | Son | — | ~1940 | |
| Elnora Johnson | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Dickinson, Iowa
Son, age 12
Dickinson, Iowa · implied b. ~1908 — 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 | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dickinson, Iowa
Son, age 22
Dickinson, Iowa · implied b. ~1908 — 24 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Employee |
| Industry | On Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dickinson-County, Iowa
Head, age 32
Dickinson-County, Iowa · implied b. ~1908 — 5 household members
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Lloyd Township |
| 1935 Residence (County) | Dickinson |
| Occupation | farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Christina Johnson (~0.92 confidence) and father Peter Johnson (~0.92 confidence) and father George Pessequet (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Christina Johnson
b. ~1869
Source mother
● Household
· direct · ~0.92
Father
Peter Johnson
b. ~1877
Source father
● Household
· direct · ~0.92
Father
George Pessequet
b. ~1894
Source father
● Household
· direct · ~0.92
This person
Anchor record
Martin Johnson
Head · 1940 · age 32 · b. ~1908 · Iowa
★ 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 — Dickinson-County, Iowa
Open full size
1940 US Federal Census — Dickinson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01157-00197)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martin Johnson THIS PERSON | 32 | Head | Farmer | Iowa |
| 2 | Elnora B Johnson | 29 | Wife | — | Iowa |
| 3 | Gayland Johnson | 5 | Son | — | Iowa |
| 4 | Ronald Johnson | 4 | Son | — | Iowa |
| 5 | Philip M. Johnson | 0 | Son | — | Iowa |
| 6 | Herman R Rockow | 56 | Head | Farmer | Iowa |
| 7 | Esther Rockow | 50 | Wife | — | Illinois |
| 8 | Enid (Ab) Rockow | 28 | Daughter | Maid | Iowa |
| 9 | Glen Rockow | 25 | Son | Farm Laborer | Iowa |
| 10 | Richard B Traver|Travers | 45 | Lodger | Farm Laborer | Kansas |
| 11 | Frank B Olberdt | 35 | Head | Farmer | Iowa |
| 12 | Lillian Olberdt | 33 | Wife | — | Iowa |
| 13 | William B Moore | 53 | Head | Farmer | Iowa |
| 14 | Elizabeth Moore | 53 | Wife | — | Iowa |
| 15 | Wayne Moore | 26 | Son | Farm Laborer | Iowa |
| 16 | Leland (Ab) Moore | 20 | Son | — | Iowa |
| 17 | Leslie (Ab) Moore | 20 | Son | — | Iowa |
| 18 | Carlyle (Ab) Moore | 18 | Son | — | Iowa |
| 19 | Edward Crummlet | 26 | Head | Farm Laborer | Iowa |
| 20 | Crummlet | 27 | Wife | — | Iowa |
| 21 | Charles B Moyer | 41 | Head | Farm Manager | Iowa |
| 22 | Neva Moyer | 40 | Wife | — | Iowa |
| 23 | Leona May Moyer | 15 | Daughter | — | Iowa |
| 24 | Phyllis Lorraine Moyer | 9 | Daughter | — | Iowa |
| 25 | Shirley Ann Moyer | 6 | Daughter | — | Iowa |
| 26 | Gordon B Marsh | 27 | Head | Farm Laborer | Iowa |
| 27 | Genevieve Marsh | 23 | Wife | — | Indiana |
| 28 | James Marsh | 5 | Son | — | Iowa |
| 29 | John B Horton | 42 | Head | Farm Manager | South Dakota |
| 30 | Theodore Horton | 46 | Wife | — | Iowa |
| 31 | Vera Horton | 21 | Daughter | Waitress | South Dakota |
| 32 | Paul Johnson | 26 | Lodger | Farmer | Wisconsin |
| 33 | Johnson | 50 | Lodger | — | Wisconsin |
| 34 | Edward C Davis | 63 | Head | Farmer | Illinois |
| 35 | Lula D Davis | 60 | Wife | — | Illinois |
| 36 | Art Rowe | 46 | Lodger | Farm Hand | Iowa |
| 37 | Ira Higgins | 54 | Lodger | Farm Hand | Iowa |
| 38 | Walter B Davis | 28 | Head | Farmer | Iowa |
| 39 | Helen Davis | 28 | Wife | — | Iowa |
| 40 | Edward John Davis | 3 | Son | — | Iowa |
Pedigree Summary
Martin
Gen 1 · 3 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)