MW
Mary Wallace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cerro-Gordo-County, Iowa
Our Model Tree links this Mary Wallace across the 1930 and 1940 US Censuses in Cerro-Gordo-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 9-person household.
Age 43
b. ~1897
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cerro-Gordo-County, Iowa |
| Surname | Wallace |
| Given Name | Mary Louise |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Mason City |
| 1935 Residence (County) | Cerro Gordo |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Mason City |
| Est. Birth Year | ~1897 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Wallace | Daughter | — | 15 | ~1925 |
| Elizabeth Wallace | Daughter | — | 23 | ~1917 |
| Albert Wallace | Head | — | 65 | ~1875 |
| Robert Wallace | Son | — | 18 | ~1922 |
| Patrick Wallace | Son | — | 12 | ~1928 |
| William Wallace | Son | — | 9 | ~1931 |
| John Wallace | Son | — | 20 | ~1920 |
| James Wallace | Son | — | 7 | ~1933 |
| Mary Wallace | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Cerro Gordo, …
Spouse, age 34
Cerro Gordo, Iowa · implied b. ~1896 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 18 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Cerro-Gordo-County, Iowa
Spouse, age 43
Cerro-Gordo-County, Iowa · implied b. ~1897 — 9 household members
| Surname | Wallace |
| Given Name | Mary Louise |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Mason City |
| 1935 Residence (County) | Cerro Gordo |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 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 Mary Wallace across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Wallace
Spouse · 1940 · age 43 · b. ~1897 · 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 — Cerro-Gordo-County, Iowa
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1940 US Federal Census — Cerro-Gordo-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01146-00509)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Doris Thingle | 27 | Wife | — | Iowa |
| 2 | Jerry Owen Thingle | 1 | Son | — | Iowa |
| 3 | Victor Tiedeman | 26 | Head | Laborer | Minnesota |
| 4 | Ruth Tiedeman | 22 | Wife | Extra Clerk | Iowa |
| 5 | Frank White | 38 | Head | Setting Pins | Iowa |
| 6 | Margaret White | 38 | Wife | — | Kansas |
| 7 | Dorothy Starkey | 11 | Step daughter | — | Kansas |
| 8 | Anita Steinkamp | 79 | Grandmother | — | Illinois |
| 9 | Minnie Westerling | 54 | Head | — | Iowa |
| 10 | Bernard Westerling | 28 | Son | Repair Man | Nebraska |
| 11 | Albert G. Wallace | 65 | Head | Painter | Michigan |
| 12 | Mary Louise Wallace THIS PERSON | 43 | Wife | — | Iowa |
| 13 | Elizabeth Wallace | 23 | Daughter | Clerk | Iowa |
| 14 | John Wallace | 20 | Son | — | Iowa |
| 15 | Robert Wallace | 18 | Son | — | Iowa |
| 16 | Dorothy Wallace | 15 | Daughter | — | Iowa |
| 17 | Patrick Wallace | 12 | Son | — | Iowa |
| 18 | William Wallace | 9 | Son | — | Iowa |
| 19 | James Wallace | 7 | Son | — | Iowa |
| 20 | Kenneth Moore | 26 | Head | Shipping Clerk | Minnesota |
| 21 | Anne Moore | 24 | Wife | — | Minnesota |
| 22 | Kenneth Jr. Moore | 4 | Son | — | Iowa |
| 23 | Daphne Moore | 2 | Daughter | — | Iowa |
| 24 | P. H. Kehm | 73 | Head | Salesman | Iowa |
| 25 | Lizzie Kehm | 70 | Wife | — | Iowa |
| 26 | Kenneth Plagg | 25 | Head | Clerk | Iowa |
| 27 | Donna Plagg | 25 | Wife | — | Iowa |
| 28 | Wava Plagg | 5 | Daughter | — | Iowa |
| 29 | Donna Mae Plagg | 3 | Daughter | — | Iowa |
| 30 | Harold Maas | 41 | Head | Carpenter | Iowa |
| 31 | Lena Maas | 42 | Wife | — | Iowa |
| 32 | Robert Maas | 14 | Son | — | Iowa |
| 33 | Donald Maas | 3 | Son | — | Iowa |
| 34 | Arthur Kangenbach | 31 | Head | Laborer | Iowa |
| 35 | Dorothy Kangenbach | 28 | Wife | — | Illinois |
| 36 | June Kangenbach | 9 | Daughter | — | Iowa |
| 37 | Ned Kangenbach | 8 | Son | — | Iowa |
| 38 | Joanne Kangenbach | 6 | Daughter | — | Iowa |
| 39 | William Kangenbach | 2 | Son | — | Iowa |
| 40 | William H. Curington | 62 | Head | Janitor | New York |
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)