LJ
Louisa Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Louisa Johnson across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1857), then head of a 3-person household.
Age 83
b. ~1857
Female
Head
Born: Sweden
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Johnson |
| Given Name | Louisa |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 83 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Pleasant Valley Township |
| 1935 Residence (County) | Scott |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same house |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Farmer |
| Township / Ward | Pleasant Valley Township |
| Est. Birth Year | ~1857 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Louisa | Age | Birth yr |
|---|---|---|---|---|
| William Johnson | Son | — | 53 | ~1887 |
| Louisa Johnson | Head | — | 83 | ~1857 |
| Florence Johnson | Daughter | — | 43 | ~1897 |
Census Appearances
1920
Rock Island, …
Other, age 62
Rock Island, Illinois · implied b. ~1858 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Louisa |
| Relationship to Head | mother |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| Year of Immigration | 1886 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1930
Rock Island, …
Other, age 73
Rock Island, Illinois · implied b. ~1857 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Louisa |
| Relationship to Head | Mother-in-law |
| Sex | F |
| Color / Race | White |
| Age | 73 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| Naturalization Status | Alien |
| Year of Immigration | 1885 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Scott-County, Iowa
Head, age 83
Scott-County, Iowa · implied b. ~1857 — 3 household members
| Surname | Johnson |
| Given Name | Louisa |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 83 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Pleasant Valley Township |
| 1935 Residence (County) | Scott |
| Naturalization Status | Naturalized |
| Occupation | farmer |
| Industry | farming |
| Class of Worker | OA |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same house |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Louisa Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Louisa Johnson
Head · 1940 · age 83 · b. ~1857 · Iowa
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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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01203-01159)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Warren E. Lyons | 39 | Head | Machinist | Iowa |
| 2 | Rosetta Lyons | 39 | Wife | — | Iowa |
| 3 | Beverly Lyons | 18 | Daughter | New Worker | Iowa |
| 4 | Jack M. Lyons | 12 | Son | — | Iowa |
| 5 | Paul F. Paulsen | 46 | Head | Packer | Illinois |
| 6 | Hazel E. Paulsen | 37 | Wife | — | Iowa |
| 7 | Carl J. Johannesen | 63 | Head | Farmer | Germany |
| 8 | Mary Johannesen | 59 | Wife | — | Iowa |
| 9 | Arthur Johnson | 42 | Head | Farmer | Iowa |
| 10 | Leo Johnson | 48 | Brother | Farmer | Iowa |
| 11 | Louisa Johnson THIS PERSON | 83 | Head | Farmer | Sweden |
| 12 | Florence Johnson | 43 | Daughter | — | Iowa |
| 13 | William Johnson | 53 | Son | — | Iowa |
| 14 | Michael Randolph | 73 | Head | — | Iowa |
| 15 | Elizabeth Randolph | 64 | Wife | — | Iowa |
| 16 | Bruce Randolph | 22 | Son | Laborer | Iowa |
| 17 | Vernon Randolph | 20 | Son | New Worker | Iowa |
| 18 | Frank Clemons | 43 | Head | Farmer | Iowa |
| 19 | Rose E. Clemons | 44 | Wife | — | Iowa |
| 20 | Alice Clemons | 21 | Daughter | Stenographer | Iowa |
| 21 | Franklin Clemons | 19 | Son | Hired Hand | Iowa |
| 22 | Charlotte Clemons | 17 | Daughter | — | Iowa |
| 23 | Mary Clemons | 14 | Son | — | Iowa |
| 24 | Frederic Clemons | 7 | Son | — | Iowa |
| 25 | Jeanette Johnston | 14 | Lodger | — | Iowa |
| 26 | Ralph Johnston | 13 | Lodger | — | Iowa |
| 27 | James Johnston | 12 | Lodger | — | Iowa |
| 28 | Luella Randolph | 76 | Head | — | Iowa |
| 29 | Ruth Greene | 40 | Daughter | — | Iowa |
| 30 | Adrienne Greene | 17 | Granddaughter | — | Illinois |
| 31 | Ruth Greene | 15 | Granddaughter | — | Illinois |
| 32 | Victor Randolph | 45 | Head | Salesman | Iowa |
| 33 | Agnes Randolph | 41 | Wife | — | Iowa |
| 34 | Alvin Randolph | 17 | Son | — | Iowa |
| 35 | Louis Randolph | 15 | Son | — | Iowa |
| 36 | Margaret Randolph | 18 | Daughter | Maid | Iowa |
| 37 | Delores Randolph | 14 | Daughter | — | Iowa |
| 38 | Madelyn Randolph | 11 | Daughter | — | Iowa |
| 39 | Septhason Randolph | 6 | Son | — | Iowa |
| 40 | Nancy Randolph | 4 | Daughter | — | Iowa |
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)