HC
Helen Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this Helen Campbell across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Louis & Helena — first a daughter (b.~1906), then head of a 3-person household.
Age 34
b. ~1906
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Campbell |
| Given Name | Helen Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | City + County of Denver |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Examiner |
| Industry | Public Schools |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1250 |
| Highest Grade | C 4 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Examiner |
| Township / Ward | City County Of Denver |
| Est. Birth Year | ~1906 |
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 | — | 34 | ~1906 |
| Louis Campbell | Head | — | 63 | ~1877 |
| Helena Campbell | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Denver, Colorado
Daughter, age 13
Denver, Colorado · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Helen L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Wyoming |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Denver, Colorado
Daughter, age 23
Denver, Colorado · implied b. ~1907 — 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 | 23 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Wyoming |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Denver-County, Colorado
Daughter, age 34
Denver-County, Colorado · implied b. ~1906 — 3 household members
| Surname | Campbell |
| Given Name | Helen Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | City + County of Denver |
| 1935 Residence (County) | Denver |
| Occupation | Examiner |
| Industry | Public Schools |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1250 |
| Highest Grade | C 4 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Louis Campbell (~0.92 confidence) and mother Helena Campbell (~0.92 confidence) and mother Mylena Campbell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Louis Campbell
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Helena Campbell
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Mylena Campbell
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Campbell
Daughter · 1940 · age 34 · b. ~1906 · Colorado
★ 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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00486-00375)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lyle Eski | 4 | Son | — | Colorado |
| 42 | Eski | 1 | Daughter | — | Colorado |
| 43 | Earl R. Kelly | 37 | Head | Pressman | Colorado |
| 44 | Edith Kelly | 35 | Wife | — | Colorado |
| 45 | Francis Dalard | 46 | Head | Salesman | Colorado |
| 46 | Loretta Dalard | 44 | Wife | — | Colorado |
| 47 | Lois William Dalard | 20 | Son | Supply | Colorado |
| 48 | Jean E. Dalard | 17 | Daughter | — | Colorado |
| 49 | Walter Boyd | 49 | Head | Manager | Missouri |
| 50 | Eulah Boyd | 52 | Wife | — | Nebraska |
| 51 | Burnett Wilmer | 59 | Head | Doctor | Long Island |
| 52 | May Hilmon Wilmer | 55 | Wife | — | Kentucky |
| 53 | George A. Wilmer | 28 | Son | Doctor | Iowa |
| 54 | William Wilmer | 24 | Son | — | Colorado |
| 55 | Carl Washburn | 35 | Head | Pressman | New York |
| 56 | Helen Washburn | 33 | Wife | — | Missouri |
| 57 | Shirley Adams | 11 | Daughter | — | Colorado |
| 58 | Sara Martin | 50 | Head | — | Pennsylvania |
| 59 | Robert Delaney | 21 | Nephew | Secretary | Colorado |
| 60 | Bert G. Heleof | 49 | Head | Maintenance | Nebraska |
| 61 | Edith Heleof | 48 | Wife | — | Ohio |
| 62 | Louis Campbell | 63 | Head | Train Master | Missouri |
| 63 | Helena M. Campbell | 62 | Wife | — | Wyoming |
| 64 | Helen Louise Campbell THIS PERSON | 34 | Daughter | Examiner | Colorado |
| 65 | John Malquen | 38 | Head | Salesman | Colorado |
| 66 | Geraldine Malquen | 35 | Wife | — | Colorado |
| 67 | Clair Malquen | 5 | Daughter | — | Colorado |
| 68 | John C. Young | 53 | Head | Judge | Colorado |
| 69 | Irene Young | 51 | Wife | — | Colorado |
| 70 | Ruth Young | 21 | Son | — | Colorado |
| 71 | Young | None | — | — | — |
| 72 | John B. Slemer | 52 | Head | Chairman Tax | Colorado |
| 73 | Henrietta Slemer | 50 | Wife | — | Colorado |
| 74 | Wayne R. Slemer | 19 | Son | Service Man | Colorado |
| 75 | Morsie Longest | 29 | Daughter | — | Colorado |
| 76 | Homer Longest | 25 | Son-in-law | Operator | Colorado |
| 77 | Richard Longest | 10 | Grandson | — | Colorado |
| 78 | Bert Longest | 7 | Grandson | — | Colorado |
| 79 | Marjorie Longest | 6 | Granddaughter | — | Colorado |
| 80 | Alice Longest | 2 | Granddaughter | — | Colorado |
Pedigree Summary
Helen
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)