RJ
Richard Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Richard Johnson across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Carroll & La — first a head (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Johnson |
| Given Name | Richard |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk County |
| Additional Details | |
| Occupation | Ship. Clerk |
| Industry | Farm Machines |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 226 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Ship. Clerk |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1916 |
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 Richard | Age | Birth yr |
|---|---|---|---|---|
| Richard Johnson | Head | — | 24 | ~1916 |
| Donald Johnson | Son | — | 1 | ~1939 |
| Helen Johnson | Spouse | — | 21 | ~1919 |
Census Appearances
1920
Polk, Iowa
Son, age 4
Polk, Iowa · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 14
Polk, Iowa · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 24
Polk-County, Iowa · implied b. ~1916 — 3 household members
| Surname | Johnson |
| Given Name | Richard |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk County |
| Occupation | Ship. Clerk |
| Industry | Farm Machines |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 226 |
| Highest Grade | Hs 4 |
| 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 Richard Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Carroll Johnson (~0.92 confidence) and mother La Johnson (~0.92 confidence) and mother Lavera Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Carroll Johnson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
La Johnson
b. ~1899
Source mother
● Household
· direct · ~0.92
Mother
Lavera Johnson
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Richard Johnson
Head · 1940 · age 24 · b. ~1916 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01196-00026)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Mccarthy | 19 | Sister | Clerk | Iowa |
| 2 | E. W. Burington | 40 | Head | Telegrapher | Penns |
| 3 | Violet Burington | 38 | Wife | — | Oklahoma |
| 4 | Roger Cave | 20 | Son | Truck Driver | Iowa |
| 5 | James Cave | 14 | Son | — | Iowa |
| 6 | George B. Blanchard | 32 | Head | Baker | S. Dakota |
| 7 | Mora Jeanne Blanchard | 30 | Wife | — | Iowa |
| 8 | Robert Blanchard | 10 | Son | — | Iowa |
| 9 | Joseph Rauter | 42 | Head | Peddler | Iowa |
| 10 | Emma B. Rauter | 42 | Wife | Starcher | Iowa |
| 11 | Phurnia Rauter | 17 | Daughter | — | Iowa |
| 12 | — | None | — | — | — |
| 13 | Adolph Christianson | 59 | Head | Dyer | Denmark |
| 14 | Edith Christianson | 44 | Wife | — | Iowa |
| 15 | Margaret Christianson | 15 | Daughter | — | Nebraska |
| 16 | Henry Bridgeman | 55 | Head | Landscaper | Iowa |
| 17 | Alpha Mae Bridgeman | 45 | Wife | Clerk | Iowa |
| 18 | Anthony E. Zika | 35 | Head | Welder | Iowa |
| 19 | Ruth Zika | 30 | Wife | Beautician | Iowa |
| 20 | John C. Dawson | 11 | Son | — | Iowa |
| 21 | Wendal Mars | 36 | Head | Clerk | Iowa |
| 22 | Myrtle Mars | 36 | Wife | — | Iowa |
| 23 | Patricia Ann Mars | 5 | Daughter | — | Iowa |
| 24 | Russell F. Lance | 43 | Head | Freight Agent | Iowa |
| 25 | Lillian Lance | 45 | Wife | — | Iowa |
| 26 | David Lance | 20 | Son | Night Clerk | Iowa |
| 27 | Mary Jane Lance | 17 | Daughter | — | Iowa |
| 28 | Richard Johnson THIS PERSON | 24 | Head | Ship. Clerk | Iowa |
| 29 | Helen G. Johnson | 21 | Wife | — | Montana |
| 30 | Donald Johnson | 1 | Son | — | Iowa |
| 31 | Donald Kister | 26 | Head | Ship Clerk | Iowa |
| 32 | Evelyn B. Kister | 22 | Wife | — | Iowa |
| 33 | Donald Kister | 2 | Son | — | Indiana |
| 34 | Alice Samuels | 70 | Mother | Saleswork | Illinois |
| 35 | Cleveland B. Koder | 54 | Head | Handicraft | Iowa |
| 36 | Bessie Koder | 53 | Wife | — | Iowa |
| 37 | Samira Latimer | 73 | Mother-in-law | — | Illinois |
| 38 | — | None | — | — | — |
| 39 | Gregory Stark | 27 | Head | Welder | Iowa |
| 40 | Thelma Stark | 23 | Wife | — | Missouri |
Pedigree Summary
Richard
Gen 1 · 3 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)