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Alma Davis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Humboldt-County, Iowa
Our Model Tree links this Alma Davis across the 1930 and 1940 US Censuses in Humboldt-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 7-person household.
Age 47
b. ~1893
Female
Spouse
Born: South Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Humboldt-County, Iowa |
| Surname | Davis |
| Given Name | Alma |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Rutland Township |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 2 |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Rutland Township |
| Est. Birth Year | ~1893 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Alma | Age | Birth yr |
|---|---|---|---|---|
| Allen Davis | Son | — | 10 | ~1930 |
| Eileen Davis | Daughter | — | 16 | ~1924 |
| Laverne Davis | Son | — | 12 | ~1928 |
| Roy Davis | Head | — | 48 | ~1892 |
| Alma Davis | Spouse | — | 47 | ~1893 |
| Royland Davis | Son | — | 7 | ~1933 |
| Lloyd Davis | Son | — | 19 | ~1921 |
Census Appearances
1930
Humboldt, Iowa
Other, age 37
Humboldt, Iowa · implied b. ~1893 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Alma M. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Age at First Marriage | 20 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Humboldt-County, Iowa
Spouse, age 47
Humboldt-County, Iowa · implied b. ~1893 — 7 household members
| Surname | Davis |
| Given Name | Alma |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Rutland Township |
| Class of Worker | 0 |
| Highest Grade | Hs 2 |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Alma Davis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Alma Davis
Spouse · 1940 · age 47 · b. ~1893 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Humboldt-County, Iowa
Open full size
1940 US Federal Census — Humboldt-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01167-00669)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Erhard Larson | 48 | Head | Farmer | Denmark |
| 2 | C. J. Mrs Knuff | 63 | Housekeeper | Housekeeper | Illinois |
| 3 | Albert Schulze | 57 | Head | Farmer | Iowa |
| 4 | Mary Schulze | 52 | Wife | — | Iowa |
| 5 | Nolean Schulze | 23 | Son | Farmer | Iowa |
| 6 | Mardell Schulze | 12 | Daughter | — | Iowa |
| 7 | Glen Schulze | 30 | Head | Farmer | Iowa |
| 8 | Ruth Schulze | 30 | Wife | — | Iowa |
| 9 | Merle Schulze | 5 | Son | — | Iowa |
| 10 | Wayne Schulze | 2 | Son | — | Iowa |
| 11 | Lawrence Ruhnke | 23 | Hired man | Farm Hand | Iowa |
| 12 | Roy A. Davis | 48 | Head | Farmer | Illinois |
| 13 | Alma Davis THIS PERSON | 47 | Wife | — | South Dakota |
| 14 | Lloyd Davis | 19 | Son | Farm Hand | Iowa |
| 15 | Eileen Davis | 16 | Daughter | — | Iowa |
| 16 | Laverne Davis | 12 | Son | — | Iowa |
| 17 | Allen Davis | 10 | Son | — | Iowa |
| 18 | Royland Davis | 7 | Son | — | Iowa |
| 19 | J. P. Cronk | 54 | Head | Laborer | Illinois |
| 20 | Mary Cronk | 54 | Wife | — | Iowa |
| 21 | Margaret Cronk | 22 | Daughter | — | Iowa |
| 22 | Rasmus Peterson | 47 | Head | — | Iowa |
| 23 | Anna Peterson | 49 | Wife | — | Penn |
| 24 | Chris J. Peterson | 46 | Head | Farmer | Iowa |
| 25 | Hanna Peterson | 39 | Wife | — | Iowa |
| 26 | Eunice Peterson | 18 | Daughter | — | Iowa |
| 27 | Dale Peterson | 14 | Son | — | Iowa |
| 28 | Kenneth Larson | 21 | Hired man | Farm Hand | Iowa |
| 29 | Guy Lee | 51 | Head | Farmer | Iowa |
| 30 | Martha Lee | 44 | Wife | — | Iowa |
| 31 | Orland Lee | 20 | Son | Farm Hand | Iowa |
| 32 | Georgette Lee | 15 | Daughter | — | Iowa |
| 33 | Velda Lee | 13 | Daughter | — | Iowa |
| 34 | Romine Lee | 11 | Son | — | Iowa |
| 35 | Anna Belle Lee | 7 | Daughter | — | Iowa |
| 36 | John Anderson | 64 | Head | Farmer | Illinois |
| 37 | Olive Anderson | 56 | Sister | — | Iowa |
| 38 | Geo Gilbert | 38 | Head | Farmer | Iowa |
| 39 | Grace Gilbert | 38 | Wife | — | Iowa |
| 40 | Marilyn Gilbert | 12 | Daughter | — | Iowa |
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)