MJ
Martin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lee-County, Iowa
Our Model Tree links this Martin Johnson across the 1920, 1930 and 1940 US Censuses in Lee-County, Iowa (XGBoost, ~Confirmed), with identified parents S & Mary — first a head (b.~1894), then head of a 6-person household.
Age 46
b. ~1894
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lee-County, Iowa |
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Montrose T. |
| 1935 Residence (County) | Lee |
| Additional Details | |
| Occupation | Salesman |
| Industry | Rawleigh Co. |
| Class of Worker | PW |
| Hours Worked | 75 |
| Income (1939) | 550 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Salesman |
| Township / Ward | Montrose T |
| Est. Birth Year | ~1894 |
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 |
|---|---|---|---|---|
| Bernice Johnson | Daughter | — | 12 | ~1928 |
| Dorothy Johnson | Daughter | — | 13 | ~1927 |
| Martin Johnson | Head | — | 46 | ~1894 |
| Emmett Davidson | Other | — | 6 | ~1934 |
| Le Johnson | Son | — | 10 | ~1930 |
| Julia Johnson | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Lee, Iowa
Son, age 26
Lee, Iowa · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farm laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Lee, Iowa
Son, age 36
Lee, Iowa · implied b. ~1894 — 49 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martin P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 31 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | Poultry farm |
| Class of Worker | VVVV OA |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Lee-County, Iowa
Head, age 46
Lee-County, Iowa · implied b. ~1894 — 6 household members
| Surname | Johnson |
| Given Name | Martin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Montrose T. |
| 1935 Residence (County) | Lee |
| Occupation | Salesman |
| Industry | Rawleigh Co. |
| Class of Worker | PW |
| Hours Worked | 75 |
| Income (1939) | 550 |
| Highest Grade | 8 |
| 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: father S Johnson (~0.92 confidence) and mother Mary Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
S Johnson
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Mary Johnson
b. ~1860
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martin Johnson
Head · 1940 · age 46 · b. ~1894 · 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 — Lee-County, Iowa
Open full size
1940 US Federal Census — Lee-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01174-01117)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John R Miller | 35 | Head | Machinist | Iowa |
| 2 | Albert J Miller | 40 | Head | Machinist | Iowa |
| 3 | Lyra Miller | 38 | Wife | Housewife | Iowa |
| 4 | Edward Miller | 16 | Son | Student | Iowa |
| 5 | Helen Miller | 14 | Daughter | Student | Iowa |
| 6 | Guerdon Miller | 11 | Son | Student | Iowa |
| 7 | Kenneth Miller | 3 | Son | — | Iowa |
| 8 | Ernest O Batley | 44 | Head | Farmer | Illinois |
| 9 | Emily Batley | 35 | Wife | Laborer | Kansas |
| 10 | Margaret Batley | 16 | Daughter | Student | Missouri |
| 11 | Ernestine Batley | 12 | Daughter | Student | Missouri |
| 12 | Dan Kirschbaum | 25 | Hired Hand | Laborer | Kansas |
| 13 | F. C. Wernert | 26 | Head | Farmer | Germany |
| 14 | Elizabeth Wernert | 20 | Wife | Housewife | Germany |
| 15 | H. L. Hamton | 36 | Head | Farmer | Missouri |
| 16 | Della Hamton | 37 | Wife | Housewife | Missouri |
| 17 | Lavone Hamton | 18 | Daughter | Laborer | Missouri |
| 18 | Basil Hamton | 16 | Son | Laborer | Missouri |
| 19 | Cecil Hamton | 15 | Son | Student | Iowa |
| 20 | Donald Hamton | 6 | Son | — | Iowa |
| 21 | George Horning | 28 | Head | Laborer | Iowa |
| 22 | Madeline Horning | 28 | Wife | Housewife | Iowa |
| 23 | Karen Horning | 1 | Daughter | — | Iowa |
| 24 | Martin Johnson THIS PERSON | 46 | Head | Salesman | Iowa |
| 25 | Julia Johnson | 31 | Wife | Housewife | Iowa |
| 26 | Dorothy Johnson | 13 | Daughter | Student | Iowa |
| 27 | Bernice Johnson | 12 | Daughter | Student | Iowa |
| 28 | Le Roy Johnson | 10 | Son | Student | Iowa |
| 29 | Emmett Davidson | 6 | Child | Student | Illinois |
| 30 | Leo Mc Veigh | 36 | Head | Laborer | Iowa |
| 31 | Helen Mc Veigh | 33 | Wife | Housewife | Illinois |
| 32 | James Mc Veigh | 17 | Son | Student | Illinois |
| 33 | Dorothy Mc Veigh | 15 | Daughter | Student | Illinois |
| 34 | Ellie Mc Veigh | 14 | Daughter | Student | Illinois |
| 35 | Richard Mc Veigh | 7 | Son | Student | Iowa |
| 36 | Joann Mc Veigh | 2 | Daughter | — | Iowa |
| 37 | Myrtle Gregory | 46 | Sister | Laborer | Iowa |
| 38 | Frank Henkey | 68 | Head | Farmer | Illinois |
| 39 | William Henkey | 71 | Brother | Farmer | Illinois |
| 40 | Paul Carter | 55 | Head | Farmer | Iowa |
Pedigree Summary
Martin
Gen 1 · 2 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)