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Frank Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Audubon-County, Iowa
Our Model Tree links this Frank Campbell across the 1920, 1930 and 1940 US Censuses in Audubon-County, Iowa (XGBoost, ~Confirmed), with identified parents James & Floyd — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Audubon-County, Iowa |
| Surname | Campbell |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Lincoln Twp. |
| 1935 Residence (County) | Audubon |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 35 |
| Income (1939) | 110 |
| Highest Grade | Hs 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Lincoln Twp |
| Est. Birth Year | ~1918 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| James Campbell | Head | — | 82 | ~1858 |
| Floyd Campbell | Other | — | 2 | ~1938 |
| David Campbell | Other | — | 1 | ~1939 |
| Frank Campbell | Son | — | 22 | ~1918 |
| Vivian Campbell | Spouse | — | 21 | ~1919 |
Census Appearances
1920
Audubon, Iowa
Son, age 2
Audubon, Iowa · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Frank A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Nebr |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Audubon, Iowa
Son, age 12
Audubon, Iowa · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Nebraska |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Audubon-County, Iowa
Son, age 22
Audubon-County, Iowa · implied b. ~1918 — 5 household members
| Surname | Campbell |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Lincoln Twp. |
| 1935 Residence (County) | Audubon |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 35 |
| Income (1939) | 110 |
| Highest Grade | Hs 4 |
| 1935 Residence | Iowa |
| 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 Frank Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Campbell (~0.92 confidence) and father Floyd Campbell (~0.92 confidence) and mother Lida Campbell (~0.92 confidence) and mother Vivian Campbell (~0.50 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.82
Father
James Campbell
b. ~1858
Source father
● Household
· direct · ~0.92
Father
Floyd Campbell
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Lida Campbell
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Vivian Campbell
b. ~1919
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Frank Campbell
Son · 1940 · age 22 · b. ~1918 · 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 — Audubon-County, Iowa
Open full size
1940 US Federal Census — Audubon-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01137-00983)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Ahrensen | 58 | Wife | Housewife | Iowa |
| 42 | Arthur Ahrensen | 24 | Son | — | Iowa |
| 43 | Alta Ahrensen | 20 | Daughter | — | Iowa |
| 44 | Elmer Mortensen | 29 | Head | Farmer | Iowa |
| 45 | Lorene Mortensen | 27 | Wife | — | Iowa |
| 46 | Dale Mortensen | 4 | Son | — | Iowa |
| 47 | Merlyn Mortensen | 2 | Son | — | Iowa |
| 48 | Henry Fischer | 57 | Head | Farmer | Iowa |
| 49 | Anna Fischer | 55 | Wife | — | Iowa |
| 50 | Lucy Fischer | 21 | Daughter | Housekeeper | Iowa |
| 51 | Charles Karslake | 47 | Hired Hand | Farm Laborer | Iowa |
| 52 | Leo O. Miller | 29 | Head | Farmer | Iowa |
| 53 | Cecilia Miller | 29 | Wife | — | Iowa |
| 54 | Clarence Kuhse | 44 | Head | Farmer | Iowa |
| 55 | Lillian Kuhse | 41 | Wife | — | Iowa |
| 56 | Wayne Kuhse | 18 | Son | — | Iowa |
| 57 | Robert Kuhse | 16 | Son | — | Iowa |
| 58 | Louis Ehlers | 60 | Head | Farmer | Iowa |
| 59 | Dora Ehlers | 54 | Wife | — | Germany |
| 60 | August O. Fischer | 49 | Head | Farmer | Iowa |
| 61 | Emilia Fischer | 45 | Wife | — | Germany |
| 62 | Harry Fischer | 21 | Son | — | Iowa |
| 63 | John Daneman | 58 | Head | Farmer | Germany |
| 64 | Ida Daneman | 55 | Wife | — | Iowa |
| 65 | Lorella Daneman | 23 | Daughter | — | Iowa |
| 66 | Albert Daneman | 26 | Son | Jeweler | Iowa |
| 67 | Lloyd Campbell | 51 | Head | Farmer | Iowa |
| 68 | Lois Campbell | 47 | Wife | — | Nebraska |
| 69 | Howard Campbell | 21 | Son | Farm Laborer | Iowa |
| 70 | George Campbell | 18 | Son | — | Iowa |
| 71 | Mary Campbell | 15 | Daughter | — | Iowa |
| 72 | James A. Campbell | 82 | Head | — | Iowa |
| 73 | Frank Campbell THIS PERSON | 22 | Son | Farmer | Iowa |
| 74 | Vivian Campbell | 21 | Wife | — | Iowa |
| 75 | Floyd Campbell | 2 | Grandson | — | Iowa |
| 76 | David Campbell | 1 | Grandson | — | Iowa |
| 77 | William Murfeldt | 56 | Head | Farmer | Iowa |
| 78 | Katie Murfeldt | 52 | Wife | — | Iowa |
| 79 | William Jr. Murfeldt | 28 | Son | — | Iowa |
| 80 | Arnold Murfeldt | 15 | Son | — | Iowa |
Pedigree Summary
Frank
Gen 1 · 4 parents
~0.81
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)