HC
Helen Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Helen Campbell across the 1910, 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Joseph & Adda — first a daughter (b.~1904), then head of a 3-person household.
Age 36
b. ~1904
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Campbell |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Beauty Shop |
| Class of Worker | OA |
| Hours Worked | 48 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Proprietor |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1904 |
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 Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Campbell | Daughter | — | 36 | ~1904 |
| Edward Campbell | Head | — | 54 | ~1886 |
| Rose Campbell | Spouse | — | 55 | ~1885 |
Census Appearances
1910
Polk, Iowa
Daughter, age 5
Polk, Iowa · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Helen F |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Polk, Iowa
Daughter, age 16
Polk, Iowa · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Helen A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 26
Polk, Iowa · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Bookkeeper |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 36
Polk-County, Iowa · implied b. ~1904 — 3 household members
| Surname | Campbell |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Proprietor |
| Industry | Beauty Shop |
| Class of Worker | OA |
| Hours Worked | 48 |
| 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 Helen Campbell across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Campbell (~0.92 confidence) and mother Adda Campbell (~0.92 confidence) and father Edward Campbell (~0.92 confidence) and mother Cora Campbell (~0.92 confidence) and father Edward Campbell (~0.92 confidence) and mother Rose Campbell (~0.92 confidence) and father Edward Campbell (~0.92 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Campbell
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Adda Campbell
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
Edward Campbell
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Cora Campbell
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
Edward Campbell
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Rose Campbell
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
Edward Campbell
b. ~1888
Source father
● Household
· direct · ~0.92
This person
Anchor record
Helen Campbell
Daughter · 1940 · age 36 · b. ~1904 · 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
40 people indexed on this census page (nara:1940:m-t0627-01193-00176)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Victor Frumpkin | 11 | Son | — | Iowa |
| 42 | Gloria Frumpkin | 9 | Daughter | — | Iowa |
| 43 | Florence Palmer | 40 | Head | Foreman | Iowa |
| 44 | Mabel Palmer | 37 | Wife | — | Iowa |
| 45 | Richard Palmer | 10 | Son | — | Iowa |
| 46 | Mary A. Briar | 74 | Head | — | Ill |
| 47 | John A. Kelley | 45 | Head | Burner | Mo |
| 48 | Florence Kelley | 42 | Wife | — | Iowa |
| 49 | Fred Kelley | 22 | Son | Handy Man | Iowa |
| 50 | Paul Kelley | 20 | Son | — | Iowa |
| 51 | Edward Campbell | 54 | Head | Price Clerk | Iowa |
| 52 | Rose Campbell | 55 | Wife | Employee | Iowa |
| 53 | Helen Campbell THIS PERSON | 36 | Daughter | Proprietor | Iowa |
| 54 | Lester Nicademus | 33 | Head | Salesman | Colo |
| 55 | Helen Nicademus | 31 | Wife | — | Iowa |
| 56 | Gerald Nicademus | 10 | Son | — | Iowa |
| 57 | Suzanne Nicademus | 9 | Daughter | — | Iowa |
| 58 | James Nicademus | 7 | Son | — | Iowa |
| 59 | Clarence Pingle | 32 | Head | Stenographer | Iowa |
| 60 | Nellie Pingle | 28 | Wife | — | Iowa |
| 61 | Marilyn Pingle | 4 | Daughter | — | Iowa |
| 62 | Jack Pingle | 2 | Son | — | Iowa |
| 63 | Joshua Vandeventer | 83 | Head | — | Virginia |
| 64 | Laura Vandeventer | 71 | Wife | — | Iowa |
| 65 | Lester Vandeventer | 34 | Son | Supply Clerk | S. Dakota |
| 66 | Henry Rasputnik | 40 | Son in law | Employee | Austria |
| 67 | Nina Rasputnik | 39 | Daughter | — | Iowa |
| 68 | Richard Rasputnik | 15 | Grandson | — | Iowa |
| 69 | Darwin Wilson | 21 | Grandson | Truck Driver | S. Dakota |
| 70 | Joseph W. Nelson | 54 | Head | Salesman | Mo |
| 71 | Georgia Nelson | 41 | Wife | Teacher | Iowa |
| 72 | Lois Mae Nelson | 7 | Daughter | — | Iowa |
| 73 | John W. Nelson | 7 | Son | — | Iowa |
| 74 | Roberta K. Nelson | 4 | Daughter | — | Iowa |
| 75 | Anna R. Ladson | 78 | Mother | — | Kansas |
| 76 | Elias Northriver | 43 | Head | Building Dept. | Iowa |
| 77 | Lolell Northriver | 31 | Son | Pressman | Iowa |
| 78 | Flossie Northriver | 30 | Daughter in law | — | Iowa |
| 79 | Geraldine Northriver | 9 | Grand daughter | — | Iowa |
| 80 | Sharon Lou Northriver | 1 | Grand daughter | — | Iowa |
Pedigree Summary
Helen
Gen 1 · 7 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)