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Clarence Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Crawford-County, Iowa
Our Model Tree links this Clarence Campbell across the 1920, 1930 and 1940 US Censuses in Crawford-County, Iowa (XGBoost, ~Confirmed), with identified parents Nathan & Walter — first a son (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Crawford-County, Iowa |
| Surname | Campbell |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Twp |
| 1935 Residence (County) | Crawford |
| Additional Details | |
| Occupation | Farm Helper |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farm Helper |
| Township / Ward | Jackson Twp |
| Est. Birth Year | ~1913 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clarence | Age | Birth yr |
|---|---|---|---|---|
| Walter Campbell | Head | — | 65 | ~1875 |
| Lettie Campbell | Spouse | — | 56 | ~1884 |
| Louis Luchtel | Other | — | 5 | ~1935 |
| Clarence Campbell | Son | — | 27 | ~1913 |
Census Appearances
1920
Crawford, Iowa
Son, age 6
Crawford, Iowa · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Clarence R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Crawford, Iowa
Son, age 16
Crawford, Iowa · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Clarence R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| 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
Crawford-County, Iowa
Son, age 27
Crawford-County, Iowa · implied b. ~1913 — 4 household members
| Surname | Campbell |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Twp |
| 1935 Residence (County) | Crawford |
| Occupation | Farm Helper |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| 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 Clarence Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Nathan Campbell (~0.92 confidence) and father Walter Campbell (~0.92 confidence) and father Walter Campbell (~0.92 confidence) and mother Lettie Campbell (~0.92 confidence) and mother Lettie Campbell (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Nathan Campbell
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Walter Campbell
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Walter Campbell
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Lettie Campbell
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Lettie Campbell
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Campbell
Son · 1940 · age 27 · b. ~1913 · 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 — Crawford-County, Iowa
Open full size
1940 US Federal Census — Crawford-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01152-00304)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alfred Dreesen | 42 | Head | Farmer | Iowa |
| 2 | Leroy Dreesen | 29 | Son | Farmer | Iowa |
| 3 | Martha Dreesen | 34 | Daughter | — | Iowa |
| 4 | Leonard D Olerich | 26 | Head | Farmer | Iowa |
| 5 | Marie Olerich | 26 | Wife | — | South Dakota |
| 6 | Raymond Olerich | 6 | Son | — | Iowa |
| 7 | Richard Olerich | 4 | Son | — | Iowa |
| 8 | Thurval O Behanan | 33 | Head | Farmer | Iowa |
| 9 | Ellen Behanan | 30 | Wife | — | Iowa |
| 10 | Inez Behanan | 12 | Daughter | — | Iowa |
| 11 | Josephine Behanan | 10 | Daughter | — | Iowa |
| 12 | Patsy Behanan | 8 | Daughter | — | Iowa |
| 13 | Letha Behanan | 5 | Daughter | — | Iowa |
| 14 | Ruth Behanan | 5 | Daughter | — | Iowa |
| 15 | Russell Behanan | 1 | Son | — | Iowa |
| 16 | E Edward Nissen | 50 | Head | Farmer | Iowa |
| 17 | Edith Nissen | 34 | Wife | — | Iowa |
| 18 | Glen Nissen | 8 | Son | — | Iowa |
| 19 | Bonita Nissen | 6 | Daughter | — | Iowa |
| 20 | Clara Quade | 77 | Mother-in-law | — | Iowa |
| 21 | Willard Jonson | 42 | Hired Hand | Farm Laborer | Iowa |
| 22 | Walter O Campbell | 65 | Head | Farmer | Iowa |
| 23 | Lettie Campbell | 56 | Wife | — | Iowa |
| 24 | Clarence Campbell THIS PERSON | 27 | Son | Farm Helper | Iowa |
| 25 | Louis Lee Luchtel | 5 | Grandson | — | Iowa |
| 26 | John Auen | 70 | Head | Farmer | Iowa |
| 27 | Anna Auen | 67 | Wife | — | Illinois |
| 28 | Jacob Auen | 45 | Son | Farm Helper | Iowa |
| 29 | Christina Auen | 35 | Daughter | Operator | Iowa |
| 30 | Robert Auen | 31 | Son | Farm Helper | Iowa |
| 31 | John Jr Auen | 28 | Son | Farm Helper | Iowa |
| 32 | William Schafer | 50 | Head | Farmer | Iowa |
| 33 | Jennie Schafer | 46 | Wife | — | Iowa |
| 34 | Lee Schafer | 29 | Son | Farm Helper | Iowa |
| 35 | Doloris Schafer | 17 | Daughter | — | Iowa |
| 36 | Coleen Schafer | 11 | Daughter | — | Iowa |
| 37 | William Dreesen | 49 | Head | Farmer | Iowa |
| 38 | Philomena Dreesen | 50 | Wife | — | Iowa |
| 39 | Marvin Dreesen | 24 | Son | Farm Helper | Iowa |
| 40 | Dorothy Dreesen | 19 | Daughter | — | Iowa |
Pedigree Summary
Clarence
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)