SJ
Sidney Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dekalb-County, Illinois
Our Model Tree links this Sidney Johnson across the 1930 and 1940 US Censuses in Dekalb-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dekalb-County, Illinois |
| Surname | Johnson |
| Given Name | Sidney |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Genoa Township |
| 1935 Residence (County) | De Kalb |
| Additional Details | |
| Occupation | Machine |
| Industry | Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Machine |
| Township / Ward | Genoa Township |
| Est. Birth Year | ~1922 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Sidney | Age | Birth yr |
|---|---|---|---|---|
| Arthur Johnson | Son | — | 24 | ~1916 |
| Harvey Johnson | Son | — | 8 | ~1932 |
| Doris Johnson | Daughter | — | 20 | ~1920 |
| Oscar Johnson | Son | — | 5 | ~1935 |
| Della Johnson | Spouse | — | 45 | ~1895 |
| Oscar Johnson | Head | — | 47 | ~1893 |
| George Johnson | Son | — | 12 | ~1928 |
| Erma Johnson | Daughter | — | 14 | ~1926 |
| Genevieve Johnson | Daughter | — | 10 | ~1930 |
| Sidney Johnson | Son | — | 18 | ~1922 |
Census Appearances
1930
Dekalb, Illinois
Son, age 8
Dekalb, Illinois · implied b. ~1922 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Sidney |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Dekalb-County, Illinois
Son, age 18
Dekalb-County, Illinois · implied b. ~1922 — 10 household members
| Surname | Johnson |
| Given Name | Sidney |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Genoa Township |
| 1935 Residence (County) | De Kalb |
| Occupation | Machine |
| Industry | Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Sidney Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Sidney Johnson
Son · 1940 · age 18 · b. ~1922 · Illinois
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Sibling
Oscar Johnson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Johnson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Johnson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Johnson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harvey Johnson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Erma Johnson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Johnson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Dekalb-County, Illinois
Open full size
1940 US Federal Census — Dekalb-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00793-00619)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jessie Johnston | 32 | Wife | — | Illinois |
| 42 | George Johnston | 10 | Son | — | Illinois |
| 43 | Corinne Johnston | 7 | Daughter | — | Illinois |
| 44 | John Henson | 73 | Head | Retired | Missouri |
| 45 | Elizabeth Henson | 49 | Wife | — | Illinois |
| 46 | Charles Lane | 60 | Head | Farmer | Illinois |
| 47 | Carrie Lane | 56 | Wife | — | Illinois |
| 48 | Okey Rayborn | 44 | Head | Farm Manager | West Virginia |
| 49 | Irene Rayborn | 36 | Wife | — | Illinois |
| 50 | Gerald Rayborn | 6 | Son | — | Illinois |
| 51 | Shirley Rayborn | 3 | Daughter | — | Illinois |
| 52 | Joseph Miller | 65 | Head | Farmer | Wisconsin |
| 53 | Francis Miller | 63 | Wife | — | Illinois |
| 54 | Francis Miller | 36 | Son | Bar Keeper | Illinois |
| 55 | Emil Paulson | 50 | Head | Farmer | Illinois |
| 56 | Mary Paulson | 45 | Wife | — | Illinois |
| 57 | John Paulson | 14 | Son | — | Illinois |
| 58 | Edward Paulson | 12 | Son | — | Illinois |
| 59 | John Tuma | 59 | Brother in law | Farmer | Illinois |
| 60 | Frances Tuma | 62 | Sister in law | — | Czechoslovakia |
| 61 | Etta Swanson | 41 | Head | Farm Manager | Illinois |
| 62 | Paul Swanson | 18 | Son | Farm Hand | Illinois |
| 63 | Floyd Swanson | 16 | Son | Farm Hand | Illinois |
| 64 | Delores Swanson | 9 | Daughter | — | Illinois |
| 65 | Oscar Johnson | 47 | Head | Farm Hand | Illinois |
| 66 | Della Johnson | 45 | Wife | — | Illinois |
| 67 | Arthur Johnson | 24 | Son | Assembling | Illinois |
| 68 | Doris Johnson | 20 | Daughter | Wrapping | Illinois |
| 69 | Sidney Johnson THIS PERSON | 18 | Son | Machine | Illinois |
| 70 | Erma Johnson | 14 | Daughter | — | Illinois |
| 71 | George Johnson | 12 | Son | — | Illinois |
| 72 | Genevieve Johnson | 10 | Daughter | — | Illinois |
| 73 | Harvey Johnson | 8 | Son | — | Illinois |
| 74 | Oscar Jr. Johnson | 5 | Son | — | Illinois |
| 75 | Lee Wylder | 60 | Head | Farmer | Illinois |
| 76 | Nettie Wylder | 58 | Wife | — | Wisconsin |
| 77 | Alice Wylder | 28 | Daughter | Mechanic | Illinois |
| 78 | David Redpath | 29 | Son in law | Clerk | Illinois |
| 79 | Albert Dudley | 35 | Hired Hand | Laborer | Illinois |
| 80 | Carl Vander | 46 | Head | Farmer | 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)