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Clarence Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Clarence Campbell across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Ernest & Ernest — first a head (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Campbell |
| Given Name | Clarence J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Baker |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 760 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Baker |
| Township / Ward | Des Moines 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clarence | Age | Birth yr |
|---|---|---|---|---|
| Marvel Campbell | Spouse | — | 22 | ~1918 |
| Clarence Campbell | Head | — | 23 | ~1917 |
| Barbie Campbell | Daughter | — | 2 | ~1938 |
Census Appearances
1920
Polk, Iowa
Son, age 3
Polk, Iowa · implied b. ~1917 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 13
Polk, Iowa · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 23
Polk-County, Iowa · implied b. ~1917 — 3 household members
| Surname | Campbell |
| Given Name | Clarence J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Baker |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 760 |
| 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 Ernest Campbell (~0.92 confidence) and father Ernest Campbell (~0.92 confidence) and mother Della Campbell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ernest Campbell
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Ernest Campbell
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Della Campbell
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Campbell
Head · 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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
35 people indexed on this census page (nara:1940:m-t0627-01196-01078)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eufelyn|Eufelym Thacker | 28 | Wife | — | Oregon |
| 42 | Wilmer Thacker | 9 | Son | — | Iowa |
| 43 | Arleen Thacker | 8 | Daughter | — | Iowa |
| 44 | Thomas E. Thacker | 6 | Son | — | Iowa |
| 45 | Karl M. Thacker | 4 | Son | — | Iowa |
| 46 | James M. Thacker | 3 | Son | — | Iowa |
| 47 | Jennifer M. Thacker | 2 | Daughter | — | Iowa |
| 48 | Jerry E. Thacker | 2 | Son | — | Iowa |
| 49 | Ross O. Wright | 31 | Head | Truck Driver | Missouri |
| 50 | Pauline Wright | 30 | Wife | — | Missouri |
| 51 | Deloris N. Wright | 9 | Daughter | — | Iowa |
| 52 | Leotta L. Wright | 5 | Daughter | — | Iowa |
| 53 | Louis F. Brogue | 43 | Head | Maintenance | South Dakota |
| 54 | Aurella R. Brogue | 28 | Wife | — | South Dakota |
| 55 | Louis H. Brogue | 21 | Son | Operator | South Dakota |
| 56 | Floyd H. Brogue | 17 | Son | — | South Dakota |
| 57 | Bobbie J. Brogue | 16 | Son | — | North Dakota |
| 58 | Clarence J. Campbell THIS PERSON | 23 | Head | Baker | Iowa |
| 59 | Marvel J. Campbell | 22 | Wife | — | Iowa |
| 60 | Barbie J. Campbell | 2 | Daughter | — | Iowa |
| 61 | Sidney Palmer | 18 | Head | Carpenter | Iowa |
| 62 | Paul S. Palmer | 53 | Father | Carpenter | Denmark |
| 63 | Carl J. Ramberg | 37 | Head | Night Watchman | Iowa |
| 64 | Blanche Ramberg | 31 | Wife | Packer | Iowa |
| 65 | Helen M. Ramberg | 11 | Daughter | — | Iowa |
| 66 | Harold Lynes | 22 | Head | Decorator | Iowa |
| 67 | Margaret Lynes | 22 | Wife | — | Iowa |
| 68 | Harold E. Lynes | 0 | Son | — | Iowa |
| 74 | Frederick W. Mason | 55 | Head | Barber | Iowa |
| 75 | Maude H. Mason | 51 | Wife | — | Iowa |
| 76 | Betty Mason | 14 | Daughter | — | Iowa |
| 77 | Hattie Elings | 64 | Head | — | Iowa |
| 78 | Juanita Elings | 32 | Daughter | Stenographer | Iowa |
| 79 | Dale W. Armbrust | 53 | Head | Service Man | Iowa |
| 80 | Mildred E. Armbrust | 46 | Wife | — | Iowa |
Pedigree Summary
Clarence
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)