DJ
Donald Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this Donald Johnson across the 1920, 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed), with identified parents Jos & Ida — first a son (b.~1915), then head of a 10-person household.
Age 25
b. ~1915
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | Johnson |
| Given Name | Donald F. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Building contractor |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Carpenter |
| Township / Ward | Cedar Rapids |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Helen Williams | Daughter | — | 21 | ~1919 |
| R Johnson | Daughter | — | 31 | ~1909 |
| Jos Johnson | Head | — | 65 | ~1875 |
| Void Void | Other | — | — | |
| Mene Johnson | Son | — | 13 | ~1927 |
| Robert Johnson | Son | — | 29 | ~1911 |
| Marion Johnson | Son | — | 19 | ~1921 |
| Donald Johnson | Son | — | 25 | ~1915 |
| J Johnson | Son | — | 27 | ~1913 |
| Ida Johnson | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Linn, Iowa
Son, age 4
Linn, Iowa · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Missouri |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Linn, Iowa
Son, age 15
Linn, Iowa · implied b. ~1915 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Donald G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| 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
Linn-County, Iowa
Son, age 25
Linn-County, Iowa · implied b. ~1915 — 10 household members
| Surname | Johnson |
| Given Name | Donald F. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Occupation | Carpenter |
| Industry | Building contractor |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 400 |
| 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 Donald Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jos Johnson (~0.92 confidence) and mother Ida Johnson (~0.92 confidence) and father Joseph Johnson (~0.92 confidence) and father Charles Chyle (~0.92 confidence) and mother Maud Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jos Johnson
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Ida Johnson
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Joseph Johnson
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Charles Chyle
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Maud Johnson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Donald Johnson
Son · 1940 · age 25 · b. ~1915 · Iowa
★ You are viewing this record
Sibling
Marion Johnson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Johnson
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mene Johnson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Williams
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
J Johnson
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
R 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 — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01175-01119)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth A. Johnson | 73 | wife | — | Pennsylvania |
| 42 | Jos. E. Johnson | 65 | head | Salesman | Iowa |
| 43 | Ida J. Johnson | 58 | wife | — | Iowa |
| 44 | R. Cecilia Johnson | 31 | daughter | Bookkeeper | Iowa |
| 45 | Robert W. Johnson | 29 | son | Traveling Salesman | Iowa |
| 46 | J. Ernest Johnson | 27 | son | Salesman | Iowa |
| 47 | Donald F. Johnson THIS PERSON | 25 | son | Carpenter | Iowa |
| 48 | Void Void | None | void | Void | void |
| 49 | Helen M. Williams | 21 | daughter | Typist Clerk | Iowa |
| 50 | Marion J. Johnson | 19 | son | Apprentice Machinist | Iowa |
| 51 | Mene H. Johnson | 13 | son | — | Iowa |
| 52 | Fred Stanford | 53 | head | Traveling Salesman | England |
| 53 | Myrtle Stanford | 49 | wife | — | Iowa |
| 54 | Wm Stanford | 9 | son | — | Iowa |
| 55 | Helen M. Kirkhart | 18 | lodger | Typist | Iowa |
| 56 | Chas. A. Wersbauer | 48 | head | Traveling Salesman | Connecticut |
| 57 | Matilda C. Wersbauer | 53 | sister | — | Connecticut |
| 58 | Louie C. Wersbauer | 77 | mother | — | Germany |
| 59 | Luverne L. Larson | 31 | head | Sign Painter | Illinois |
| 60 | Esther L. Larson | 27 | wife | — | Iowa |
| 61 | Ann C. Larson | 2 | daughter | — | Iowa |
| 62 | Allen L. Larson | 0 | son | — | Iowa |
| 63 | Mary L. Jeanes | 37 | head | Society Editor | Iowa |
| 64 | Ellen C. Jeanes | 13 | daughter | — | France |
| 65 | Mary F. Jeanes | 8 | daughter | — | France |
| 66 | Viola M. Worley | 20 | maid | Maid | Iowa |
| 67 | Wm N. Ryan | 55 | head | Salesman | Iowa |
| 68 | Ethel J. Ryan | 51 | wife | — | Iowa |
| 69 | Wm P. Ryan | 19 | son | Clerk Of Tool Crib | Iowa |
| 70 | Barbara J. Ryan | 17 | daughter | Waitress | Iowa |
| 71 | Mildred Murfield | 29 | head | Cashier | Minnesota |
| 72 | Bernetta Coner | 37 | partner | Bookkeeper | Indiana |
| 73 | Clarence H. Coner | 33 | husband | — | Indiana |
| 74 | Ralph R. Johnson | 56 | head | Laborer | Illinois |
| 75 | Mildred Johnson | 17 | daughter | — | Illinois |
| 76 | Kenneth Wertz | 26 | head | Assembly Man | Iowa |
| 77 | Doris Wertz | 25 | wife | Salesperson | Iowa |
| 78 | Lyman W. Benton | 23 | head | Apprentice Machinist | Iowa |
| 79 | F. Earl Maysent | 41 | head | Salesman | Iowa |
| 80 | Agnes A. Maysent | 32 | wife | — | Iowa |
Pedigree Summary
Donald + 6 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)