DC
Donald Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Clinton-County, Iowa
Our Model Tree links this Donald Campbell across the 1920, 1930 and 1940 US Censuses in Clinton-County, Iowa (XGBoost, ~Confirmed), with identified parents Harold & Herbert — first a son (b.~1917), then head of a 2-person household.
Age 23
b. ~1917
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clinton-County, Iowa |
| Surname | Campbell |
| Given Name | Donald M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Additional Details | |
| Occupation | Circular Saw Operator |
| Industry | Toy Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 574 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Circular Saw Operator |
| Township / Ward | Clinton City |
| Est. Birth Year | ~1917 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Donald Campbell | Son | — | 23 | ~1917 |
| Hazel Campbell | Head | — | 47 | ~1893 |
Census Appearances
1920
Clinton, Iowa
Son, age 3
Clinton, Iowa · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Clinton, Iowa
Son, age 13
Clinton, Iowa · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Donald L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| 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
Clinton-County, Iowa
Son, age 23
Clinton-County, Iowa · implied b. ~1917 — 2 household members
| Surname | Campbell |
| Given Name | Donald M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Occupation | Circular Saw Operator |
| Industry | Toy Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 574 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| 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 Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harold Campbell (~0.92 confidence) and father Herbert Campbell (~0.92 confidence) and father Hazel Campbell (~0.92 confidence) and mother Hazel Campbell (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harold Campbell
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Herbert Campbell
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Hazel Campbell
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Hazel Campbell
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Donald Campbell
Son · 1940 · age 23 · b. ~1917 · 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 — Clinton-County, Iowa
Open full size
1940 US Federal Census — Clinton-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01150-00526)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clara M. Haes | 41 | Wife | — | Iowa |
| 2 | Lois R. Haes | 19 | Daughter | Filing Clerk | Iowa |
| 3 | Loraine E. Haes | 17 | Daughter | — | Iowa |
| 4 | Donald A. Haes | 3 | Son | — | Iowa |
| 5 | Raymond F. Rowland | 52 | Head | Furniture Finisher | Iowa |
| 6 | Rose A. Rowland | 50 | Wife | — | Eire |
| 7 | Kathleen Rowland | 17 | Daughter | — | Iowa |
| 8 | Jeanne Rowland | 15 | Daughter | — | Iowa |
| 9 | Raymond F. Jr. Rowland | 8 | Son | — | Iowa |
| 10 | Rosemary Simms | 19 | Daughter | — | Iowa |
| 11 | Thomas J. Dyer | 52 | Head | Barber | Iowa |
| 12 | Frieda C. Dyer | 53 | Wife | — | Iowa |
| 13 | Mary E. Dyer | 20 | Daughter | Telephone Operator | Iowa |
| 14 | Thomas J. Jr. Dyer | 18 | Son | Salesman | Iowa |
| 15 | Patrick J. Dyer | 15 | Son | — | Iowa |
| 16 | Mary Dyer | 80 | Mother | — | Eire |
| 17 | May Dyer | 56 | Sister | — | Iowa |
| 18 | Katherine Dyer | 53 | Sister | Cook & Waitress | Iowa |
| 19 | Alfred H. Franzen | 58 | Head | Machine Operator | Iowa |
| 20 | William C. Franzen | 52 | Brother | — | Iowa |
| 21 | Arnold J. Weber | 35 | Head | Material Loader | Iowa |
| 22 | Alma B. Weber | 33 | Wife | — | Iowa |
| 23 | Henry C. Dining | 57 | Head | Yard Clerk | Ohio |
| 24 | Gertrude D. Dining | 56 | Wife | — | Iowa |
| 25 | Juanita R. Dining | 25 | Daughter | Waitress | Iowa |
| 26 | Norma E. Dining | 19 | Daughter | Private Secretary | Iowa |
| 27 | James E. Dining | 16 | Son | — | Iowa |
| 28 | John H. Dining | 13 | Son | — | Iowa |
| 29 | Henrietta Jones | 22 | Daughter | Waitress | Iowa |
| 30 | Robert F. Jones | 5 | Son | — | Iowa |
| 31 | Gerald E. Kirk | 30 | Head | Service Man | Iowa |
| 32 | Caroline V. Kirk | 28 | Wife | — | Iowa |
| 33 | Geraldine R. Kirk | 10 | Daughter | — | Iowa |
| 34 | Grant E. Kirk | 8 | Son | — | Iowa |
| 35 | Dwayne C. Kirk | 6 | Son | — | Iowa |
| 36 | Janice P. Kirk | 5 | Daughter | — | Iowa |
| 37 | Marlene Crapelle | 19 | Lodger | Button Girl | Iowa |
| 38 | Hazel G. Campbell | 47 | Head | — | Iowa |
| 39 | Donald M. Campbell THIS PERSON | 23 | Son | Circular Saw Operator | Iowa |
| 40 | Albert C. Ringler | 65 | Head | Painter | Wisconsin |
Pedigree Summary
Donald
Gen 1 · 4 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)