DJ
Donald Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Adair-County, Iowa
Our Model Tree links this Donald Johnson across the 1920, 1930 and 1940 US Censuses in Adair-County, Iowa (XGBoost, ~Confirmed), with identified parents Alex & Eilert — first a son (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Adair-County, Iowa |
| Surname | Johnson |
| Given Name | Donald L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lee Township |
| 1935 Residence (County) | Adair |
| Additional Details | |
| Occupation | Farmer |
| Industry | General Farming |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Lee Township |
| Est. Birth Year | ~1915 |
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 Donald | Age | Birth yr |
|---|---|---|---|---|
| Eilert Johnson | Head | — | 58 | ~1882 |
| Donald Johnson | Son | — | 25 | ~1915 |
| Jessie Johnson | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Adair, Iowa
Son, age 5
Adair, Iowa · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Donald L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | No |
| Can Write | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Adair, Iowa
Son, age 16
Adair, Iowa · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Donald V. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Adair-County, Iowa
Son, age 25
Adair-County, Iowa · implied b. ~1915 — 3 household members
| Surname | Johnson |
| Given Name | Donald L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lee Township |
| 1935 Residence (County) | Adair |
| Occupation | Farmer |
| Industry | General Farming |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | H 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 Donald Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alex Johnson (~0.92 confidence) and father Eilert Johnson (~0.92 confidence) and mother Edna Johnson (~0.92 confidence) and mother Jessie Johnson (~0.92 confidence) and mother Jessie Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alex Johnson
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Eilert Johnson
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Edna Johnson
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Jessie Johnson
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Jessie Johnson
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
William Johnson
b. ~1890
Source father
● Household
· direct · ~0.92
This person
Anchor record
Donald Johnson
Son · 1940 · age 25 · b. ~1915 · 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 — Adair-County, Iowa
Open full size
1940 US Federal Census — Adair-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01136-00220)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John S. Gibson | 42 | Head | Farmer | Iowa |
| 2 | Josephine P. Gibson | 42 | Wife | — | Iowa |
| 3 | Mary L. Gibson | 7 | Dau | — | Iowa |
| 4 | Glenn H. Gibson | 5 | Son | — | Iowa |
| 5 | Shirley A. Gibson | 4 | Dau | — | Iowa |
| 6 | Eugene E. Gilgan | 24 | Head | Farmer | Illinois |
| 7 | Eunice H. Gilgan | 21 | Wife | — | Iowa |
| 8 | Wilma D. Gilgan | 2 | Dau | — | Iowa |
| 9 | Pius W. Wistuba | 63 | Head | Farmer | Germany |
| 10 | Bertha Wistuba | 55 | Wife | — | Germany |
| 11 | Melvin Gumbuck | 23 | Hired Hand | Laborer | Iowa |
| 12 | Rex A. Wallace | 29 | Head | Farmer | Iowa |
| 13 | Mildred Wallace | 28 | Wife | — | Iowa |
| 14 | Wayne A. Wallace | 1 | Son | — | Iowa |
| 15 | Eilert C. Johnson | 58 | Head | Farmer | Iowa |
| 16 | Jessie C. Johnson | 56 | Wife | — | Iowa |
| 17 | Donald L. Johnson THIS PERSON | 25 | Son | Farmer | Iowa |
| 18 | Geo V. Gibbs | 51 | Head | Farmer | Iowa |
| 19 | Maggie M. Gibbs | 49 | Wife | — | Iowa |
| 20 | Lloyd E. Reynolds | 26 | Head | Laborer | Iowa |
| 21 | Dorothy L. Reynolds | 20 | Wife | — | Iowa |
| 22 | Barbara A. Reynolds | 1 | Dau | — | Iowa |
| 23 | Walter L. Weaver | 53 | Head | Farmer | Iowa |
| 24 | Ina M. Weaver | 46 | Wife | — | Iowa |
| 25 | Guy E. Weaver | 23 | Son | Laborer | Iowa |
| 26 | Glenn S. Corner | 42 | Head | Farmer | Iowa |
| 27 | Hazel B. Corner | 37 | Wife | — | Iowa |
| 28 | Lloyd L. Corner | 17 | Son | Farmer | Iowa |
| 29 | John H. Mollen | 66 | Head | Farmer | Iowa |
| 30 | Mabel R. Mollen | 58 | Wife | — | Iowa |
| 31 | Ruth Christensen | 15 | Housekeeper | Housekeeper | Iowa |
| 32 | John Gellinger | 44 | Head | Farmer | Iowa |
| 33 | Dorothy G. Gellinger | 34 | Wife | — | Iowa |
| 34 | Leland W. Gellinger | 13 | Son | — | Iowa |
| 35 | Nyman B. Gellinger | 12 | Son | — | Iowa |
| 36 | Robert D. Gellinger | 8 | Son | — | Iowa |
| 37 | Arline Gellinger | 3 | Dau | — | Iowa |
| 38 | Mary Lou Spach | 9 | Niece | — | Iowa |
| 39 | Elvin Weaver | 25 | Head | Farmer | Iowa |
| 40 | Iona M. Weaver | 23 | Wife | — | Iowa |
Pedigree Summary
Donald
Gen 1 · 6 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)