CJ
Chester Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Chester Johnson across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Martin & Martin — first a son (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Johnson |
| Given Name | Chester O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Geology Teacher |
| Industry | College |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 600 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Geology Teacher |
| Township / Ward | Moline |
| Est. Birth Year | ~1913 |
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 Chester | Age | Birth yr |
|---|---|---|---|---|
| Alice Johnson | Daughter | — | 23 | ~1917 |
| Elinor Johnson | Daughter | — | 31 | ~1909 |
| Alvina Johnson | Spouse | — | 64 | ~1876 |
| Chester Johnson | Son | — | 27 | ~1913 |
| Martin Johnson | Head | — | 66 | ~1874 |
Census Appearances
1920
Rock Island, …
Son, age 6
Rock Island, Illinois · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Chester P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Son, age 17
Rock Island, Illinois · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Chester C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Son, age 27
Rock-Island-County, Illinois · implied b. ~1913 — 5 household members
| Surname | Johnson |
| Given Name | Chester O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moline |
| 1935 Residence (County) | Rock Island |
| Occupation | Geology Teacher |
| Industry | College |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 600 |
| Highest Grade | C 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 Chester Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Martin Johnson (~0.92 confidence) and father Martin Johnson (~0.92 confidence) and father Martin Johnson (~0.92 confidence) and mother Albina Johnson (~0.92 confidence) and mother Alvina Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Johnson
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Martin Johnson
b. ~1864
Source father
● Household
· direct · ~0.92
Father
Martin Johnson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Albina Johnson
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Alvina Johnson
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Chester Johnson
Son · 1940 · age 27 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
Alice Johnson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elinor Johnson
Sibling · 1940 · age 31
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 — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00875-00329)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James E. Coyle | 6 | Son | — | Illinois |
| 42 | Kathryn L. Coyle | 5 | Daughter | — | Illinois |
| 43 | George Lundquist | 52 | Head | Electrician | Illinois |
| 44 | Thyra Lundquist | 51 | Wife | — | Illinois |
| 45 | Helen A. Lundquist | 25 | Daughter | Stenographer | Illinois |
| 46 | Mildred L. Lundquist | 19 | Daughter | Stenographer | Illinois |
| 47 | Martin L. Johnson | 66 | Head | — | Illinois |
| 48 | Alvina E. Johnson | 64 | Wife | — | Illinois |
| 49 | Elinor C. Johnson | 31 | Daughter | Librarian | Illinois |
| 50 | Chester O. Johnson THIS PERSON | 27 | Son | Geology Teacher | Illinois |
| 51 | Alice E. Johnson | 23 | Daughter | Clerk - Salesman | Illinois |
| 52 | Claus A. Gustafson | 49 | Head | Blacksmith | Sweden |
| 53 | Ellen C. Gustafson | 53 | Wife | — | Sweden |
| 54 | Donna M. Gustafson | 10 | Niece | — | Illinois |
| 55 | Raymond Dryoel | 33 | Head | Foreman (Shop) | Belgium |
| 56 | Eleanor Dryoel | 35 | Wife | — | Illinois |
| 57 | Albert H. Dryoel | 14 | Stepson | — | Illinois |
| 58 | Charles L. De Grave | 51 | Head | Asst. Foreman | Belgium |
| 59 | Mathilda De Grave | 45 | Wife | — | Belgium |
| 60 | Maurice L. Sevenandt | 31 | Head | Truck Driver | Belgium |
| 61 | Martha Sevenandt | 35 | Wife | — | Illinois |
| 62 | Marian L. Sevenandt | 11 | Daughter | — | Illinois |
| 63 | Jack C. Sevenandt | 8 | Son | — | Illinois |
| 64 | Julius C. Van Tomme | 61 | Head | Machine Operat. | Belgium |
| 65 | Elodie Van Tomme | 58 | Wife | — | Belgium |
| 66 | Clarence Lundquist | 46 | Head | Machinist | Illinois |
| 67 | Ruth Lundquist | 46 | Wife | — | Illinois |
| 68 | Oscar Bjorn | 54 | Head | Draftsman | Denmark |
| 69 | Valborg Bjorn | 50 | Wife | — | Denmark |
| 70 | Nelly R. Bjorn | 20 | Son | Pattern Maker Apprentice | Illinois |
| 71 | Genevieve Bjorn | 18 | Daughter | — | Illinois |
| 72 | Elmer H. Castle | 50 | Head | Sheet Metal Work | Illinois |
| 73 | Lina M. Castle | 41 | Wife | Attendant | Illinois |
| 74 | Margaret V. Castle | 23 | Daughter | Stenographer | Illinois |
| 75 | Edwin C. Lundquist | 44 | Head | Blacksmith | Illinois |
| 76 | Irene H. Lundquist | 44 | Wife | — | Illinois |
| 77 | Glenn A. Lundquist | 16 | Son | — | Illinois |
| 78 | Clarence A. Rasmusson | 37 | Head | Machine Operat. | Illinois |
| 79 | May V. Rasmusson | 31 | Wife | — | Illinois |
| 80 | Joyce A. Rasmusson | 9 | Daughter | — | Illinois |
Pedigree Summary
Chester + 2 siblings
Gen 1 · 5 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)