LJ
Louisa Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boone-County, Illinois
Our Model Tree links this Louisa Johnson across the 1920, 1930 and 1940 US Censuses in Boone-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1855), then head of a 3-person household.
Age 85
b. ~1855
Female
Head
Born: Sweden
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Illinois |
| Surname | Johnson |
| Given Name | Louisa |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 85 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Belvidere city |
| 1935 Residence (County) | Boone |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Township / Ward | Belvidere City |
| Est. Birth Year | ~1855 |
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 |
|---|---|---|---|---|
| Louisa Johnson | Head | — | 85 | ~1855 |
| Mabel Johnson | Daughter | — | 39 | ~1901 |
| Hulda Johnson | Daughter | — | 54 | ~1886 |
Census Appearances
1920
Boone, Illinois
Spouse, age 66
Boone, Illinois · implied b. ~1854 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Louisa |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1880 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1930
Boone, Illinois
Other, age 75
Boone, Illinois · implied b. ~1855 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Louise |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1882 |
| Age at First Marriage | 24 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Boone-County, Illinois
Head, age 85
Boone-County, Illinois · implied b. ~1855 — 3 household members
| Surname | Johnson |
| Given Name | Louisa |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 85 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Belvidere city |
| 1935 Residence (County) | Boone |
| Naturalization Status | Naturalized |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| 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 85 · b. ~1855 · Illinois
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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 — Boone-County, Illinois
Open full size
1940 US Federal Census — Boone-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00760-00083)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Stuppfell | 66 | Head | Meter Reader | Wisconsin |
| 42 | Nellie Stuppfell | 55 | Wife | — | Illinois |
| 43 | Seymour Tanner | 67 | Head | — | England |
| 44 | Gertrude Tanner | 27 | Daughter | Teacher | Illinois |
| 45 | Louisa Johnson THIS PERSON | 85 | Head | — | Sweden |
| 46 | Hulda Johnson | 54 | Daughter | House Keeper | Illinois |
| 47 | Mabel Johnson | 39 | Daughter | — | Illinois |
| 48 | Fred A. Marraw | 67 | Head | Salesman | Illinois |
| 49 | Jessie R. Marraw | 57 | Wife | — | Illinois |
| 50 | John Mulligan | 59 | Head | Salesman | Ireland |
| 51 | Jennie B. Mulligan | 62 | Wife | — | Illinois |
| 52 | Ida Rowe | 59 | Head | — | New York |
| 53 | Robert Rowe | 30 | Son | Manager | Illinois |
| 54 | George H. Graves | 45 | Head | Machinist | Illinois |
| 55 | Mina J. Graves | 45 | Wife | — | Illinois |
| 56 | Charles Graves | 11 | Son | — | Illinois |
| 57 | George Franklin Graves | 5 | Son | — | Illinois |
| 58 | Robert Blake | 21 | Nephew | Tool Maker | Illinois |
| 59 | Verna Wheat | 69 | Head | — | Illinois |
| 60 | Harry M. Perkins | 55 | Head | Owner | Illinois |
| 61 | Myron D. Perkins | 24 | Son | Order Clerk | Illinois |
| 62 | Fred A. Perkins | 67 | Head | — | Illinois |
| 63 | Maude E. Perkins | 48 | Wife | — | Illinois |
| 64 | Frank B. Perkins | 84 | Mother | — | Illinois |
| 65 | Cora Tucker | 69 | Head | Deputy County | Illinois |
| 66 | Ella M. Gilbert | 80 | Head | — | Illinois |
| 67 | Frank Gilbert | 54 | Son | — | Illinois |
| 68 | Edward J. Gilbert | 47 | Son | Automobile Repair | Illinois |
| 69 | Louisa Gilbert | 43 | Daughter in law | — | Illinois |
| 70 | Frances J. Gilbert | 20 | Grand daughter | Stenographer | Illinois |
| 71 | G. Alvin Wilson | 45 | Head | Moulder | Illinois |
| 72 | Lorena Wilson | 50 | Wife | — | Iowa |
| 73 | Mary Wilson | 72 | Mother | — | Germany |
| 74 | William A. Day | 31 | Head | Auditor | Illinois |
| 75 | Gladys Day | 31 | Wife | Cashier | Illinois |
| 76 | A. Grace Day | 61 | Head | Repair Correction | Illinois |
| 77 | George Schmell | 39 | Son in law | Machinist | Illinois |
| 78 | Grace Schmell | 39 | Daughter | Secretary | Missouri |
| 79 | Carl L. Hicks | 53 | Head | Tool Maker | Illinois |
| 80 | Marie Hicks | 34 | Wife | — | Illinois |
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)