RJ
Ronald Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Ronald Johnson across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 5-person household.
Age 13
b. ~1927
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Ronald W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Chicago |
| Est. Birth Year | ~1927 |
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 Ronald | Age | Birth yr |
|---|---|---|---|---|
| Warren Johnson | Son | — | 19 | ~1921 |
| Adelaide Johnson | Spouse | — | 48 | ~1892 |
| Ronald Johnson | Son | — | 13 | ~1927 |
| Rodger Johnson | Son | — | 13 | ~1927 |
| Wilbur Johnson | Head | — | 58 | ~1882 |
Census Appearances
1930
Cook, Illinois
Son, age 3
Cook, Illinois · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ronald R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Minnesota |
| Can Read/Write | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Cook-County, Illinois
Son, age 13
Cook-County, Illinois · implied b. ~1927 — 5 household members
| Surname | Johnson |
| Given Name | Ronald W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 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 Ronald Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ronald Johnson
Son · 1940 · age 13 · b. ~1927 · Illinois
★ You are viewing this record
Sibling
Warren Johnson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rodger Johnson
Sibling · 1940 · age 13
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01022-00130)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Petra Milner | 57 | Wife | — | Norway |
| 42 | Burnetta Milner | 31 | Daughter | Stenographer | Illinois |
| 43 | Wilbur Johnson | 58 | Head | Vice President | Ohio |
| 44 | Adelaide Johnson | 48 | Wife | — | Minnesota |
| 45 | Warren B. Johnson | 19 | Son | — | Minnesota |
| 46 | Ronald W. Johnson THIS PERSON | 13 | Son | — | Iowa |
| 47 | Rodger M. Johnson | 13 | Son | — | Iowa |
| 48 | Anton Swanson | 61 | Head | Sales Clerk | Sweden |
| 49 | Juquita Swanson | 62 | Wife | — | Sweden |
| 50 | Catherine Swanson | 33 | Daughter | File Clerk | Illinois |
| 51 | Dorothy Swanson | 25 | Daughter | Bookkeeper | Illinois |
| 52 | Ruth Biska | 33 | Daughter | Owner (Bus) | Illinois |
| 53 | Zoe Biska | 5 | Gr. Daughter | — | Illinois |
| 54 | Harry Wheeler | 37 | Head | Partner (Owner) | Illinois |
| 55 | Ruth Wheeler | 31 | Wife | — | Illinois |
| 56 | Margaret Wheeler | 6 | Daughter | — | Illinois |
| 57 | Barbara Wheeler | 4 | Daughter | — | Illinois |
| 58 | Harold Heaney | 39 | Head | Proprietor (Owner) | Illinois |
| 59 | Lornie Heaney | 39 | Wife | — | Michigan |
| 60 | Dorothy Heaney | 13 | Daughter | — | Illinois |
| 61 | Henry Chase | 36 | Head | Routeman | Vermont |
| 62 | Vera Chase | 35 | Wife | — | Wisconsin |
| 63 | Carol Chase | 5 | Daughter | — | Illinois |
| 64 | Maurice Sawyer | 35 | Head | Salesman | Illinois |
| 65 | Florence Sawyer | 35 | Wife | — | Illinois |
| 66 | Sharon Sawyer | 3 | Daughter | — | Illinois |
| 67 | Harold Admon | 30 | Head | Salesman | Ohio |
| 68 | Roberta Admon | 25 | Wife | — | Connecticut |
| 69 | Lewis Melvin | 34 | Head | Salesman (Service) | Illinois |
| 70 | Vera Melvin | 37 | Wife | — | Illinois |
| 71 | Philip Melvin | 4 | Son | — | Illinois |
| 72 | Don Darr | 33 | Head | Accountant | Ohio |
| 73 | Blanche Darr | 34 | Wife | — | Ohio |
| 74 | Catherine Darr | 5 | Daughter | — | Illinois |
| 75 | Richard Barnett | 36 | Head | Salesman | Missouri |
| 76 | Alice Barnett | 36 | Wife | — | Illinois |
| 77 | William Barnett | 11 | Son | — | Illinois |
| 78 | Pierre Cooney | 34 | Head | Estimator | Illinois |
| 79 | Rosemary Cooney | 23 | Sister | Social Worker | Illinois |
| 80 | Henry Schemberg | 48 | Head | Service Engineer | 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)