MC
Mary Case — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Case across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 8-person household.
Age 38
b. ~1902
Female
Spouse
Born: Texas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Case |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Assistant |
| Industry | Retail Drug Store |
| Class of Worker | NP |
| Hours Worked | 35 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Occupation | Assistant |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1902 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Richard Case | Son | — | 16 | ~1924 |
| James Case | Son | — | 8 | ~1932 |
| Helen Case | Daughter | — | 11 | ~1929 |
| Frank Case | Head | — | 39 | ~1901 |
| Donald Case | Son | — | 15 | ~1925 |
| Mary Case | Spouse | — | 38 | ~1902 |
| Betty Case | Daughter | — | 13 | ~1927 |
| Jack Case | Son | — | 10 | ~1930 |
Census Appearances
1930
Polk, Iowa
Spouse, age 28
Polk, Iowa · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Case |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Texas |
| Age at First Marriage | 18 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Polk-County, Iowa
Spouse, age 38
Polk-County, Iowa · implied b. ~1902 — 8 household members
| Surname | Case |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Assistant |
| Industry | Retail Drug Store |
| Class of Worker | NP |
| Hours Worked | 35 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 Mary Case across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Case
Spouse · 1940 · age 38 · b. ~1902 · 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 — 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-t0627-01197-00440)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ellen Q. Heggen | 27 | Daughter | — | Iowa |
| 2 | Robert J. Heggen | 19 | Grandson | Deliveryman | Iowa |
| 3 | Frances Christensen | 51 | Head | — | Iowa |
| 4 | Orville Orcutt | 61 | Head | Minister | Iowa |
| 5 | Florence Orcutt | 43 | Wife | — | Iowa |
| 6 | Cecil Miller | 46 | Head | Accountant | Missouri |
| 7 | Laura Miller | 43 | Wife | — | Missouri |
| 8 | Wayne Miller | 18 | Son | News Worker | Iowa |
| 9 | William Miller | 16 | Son | — | Iowa |
| 10 | Victor Andre | 25 | Head | Bookkeeper | Kansas |
| 11 | Flora Andre | 26 | Wife | — | Iowa |
| 12 | Victoria Andre | 2 | Daughter | — | Iowa |
| 13 | William Kelsey | 56 | Head | Conductor | Iowa |
| 14 | Mable Kelsey | 55 | Wife | — | Iowa |
| 15 | Wm Heath | 27 | Boarder | Interne | Iowa |
| 16 | Wm Heath | 87 | Father in law | — | Vermont |
| 17 | Adam Schultz | 69 | Head | Mail Carrier | Iowa |
| 18 | Delia Schultz | 78 | Wife | — | Ohio |
| 19 | John Martin | 76 | Brother in law | — | Ohio |
| 20 | Harold Hankins | 41 | Head | Brick-Layer | Iowa |
| 21 | Tillie Hankins | 41 | Wife | — | Iowa |
| 22 | John Van Hoenecker | 26 | Roomer | Manager | Nebraska |
| 23 | John B. Roseberry | 50 | Head | Blacksmith | Missouri |
| 24 | Mindie Roseberry | 56 | Wife | — | Iowa |
| 25 | Darlene Roseberry | 12 | Daughter | — | Iowa |
| 26 | Charles Hauck | 43 | Head | Driver Mechanic | Iowa |
| 27 | Lela Hauck | 39 | Wife | — | Iowa |
| 28 | Betty Hauck | 19 | Daughter | — | Iowa |
| 29 | Frank Case | 39 | Head | Pharmacist | Illinois |
| 30 | Mary Case THIS PERSON | 38 | Wife | Assistant | Texas |
| 31 | Richard Case | 16 | Son | Delivery | Iowa |
| 32 | Donald Case | 15 | Son | Delivery | Iowa |
| 33 | Betty Case | 13 | Daughter | — | Iowa |
| 34 | Helen Case | 11 | Daughter | — | Iowa |
| 35 | Jack Case | 10 | Son | — | Iowa |
| 36 | James Case | 8 | Son | — | Iowa |
| 37 | — | None | — | — | — |
| 38 | Lawrence Schrandt | 33 | Head | Asst Manager | Iowa |
| 39 | Vivian Schrandt | 26 | Wife | — | Iowa |
| 40 | Donald Schrandt | 4 | Son | — | 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)