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Mary Bauer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Warren-County, Iowa
Our Model Tree links this Mary Bauer across the 1920, 1930 and 1940 US Censuses in Warren-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 2-person household.
Age 63
b. ~1877
Female
Head
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Warren-County, Iowa |
| Surname | Bauer |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | White Breast Twp. |
| 1935 Residence (County) | Warren |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | White Breast Twp |
| Est. Birth Year | ~1877 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Bertha Bauer | Daughter | — | 22 | ~1918 |
| Mary Bauer | Head | — | 63 | ~1877 |
Census Appearances
1920
Warren, Iowa
Spouse, age 43
Warren, Iowa · implied b. ~1877 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bauer |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Warren, Iowa
Spouse, age 53
Warren, Iowa · implied b. ~1877 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bauer |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 17 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Warren-County, Iowa
Head, age 63
Warren-County, Iowa · implied b. ~1877 — 2 household members
| Surname | Bauer |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | White Breast Twp. |
| 1935 Residence (County) | Warren |
| 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 Bauer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Bauer
Head · 1940 · age 63 · b. ~1877 · 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 — Warren-County, Iowa
Open full size
1940 US Federal Census — Warren-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01210-00556)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elmer J. Mitchell | 58 | Head | House Wife | South America |
| 2 | Mary E. Mitchell | 20 | Daughter | — | Ohio |
| 3 | Jeffrey E. Mitchell | 16 | Son | — | Iowa |
| 4 | Leota Mitchell | 12 | Daughter | — | Iowa |
| 5 | John O. Lepley | 51 | Head | Farmer | Iowa |
| 6 | Maggie Lepley | 40 | Wife | House Wife | Iowa |
| 7 | Virgil Lepley | 19 | Son | Farm Labor | Iowa |
| 8 | Louise Lepley | 17 | Daughter | House Maid | Iowa |
| 9 | John Jr. Lepley | 16 | Son | — | Iowa |
| 10 | H. E. Moore | 60 | Head | Farmer | Iowa |
| 11 | Minnie R. Moore | 55 | Wife | House Wife | Iowa |
| 12 | Chas. O. Irving | 56 | Head | Farmer | Iowa |
| 13 | Mary E. Irving | 52 | Wife | House Wife | Iowa |
| 14 | August D. Dittmer | 41 | Head | Farmer | Iowa |
| 15 | Mary A. Dittmer | 34 | Wife | House Wife | Iowa |
| 16 | Darrel Dittmer | 13 | Son | — | Iowa |
| 17 | Lorain Dittmer | 10 | Daughter | — | Iowa |
| 18 | Evelyn Dittmer | 9 | Daughter | — | Iowa |
| 19 | Louis Dittmer | 45 | Head | Farmer | Iowa |
| 20 | Mamie Dittmer | 46 | Wife | House Wife | Iowa |
| 21 | Joe Riffuge | 58 | Head | Farmer | Iowa |
| 22 | Margret Riffuge | 40 | Wife | House Wife | Iowa |
| 23 | Ruth Riffuge | 13 | Daughter | — | Iowa |
| 24 | Rita Riffuge | 10 | Daughter | — | Iowa |
| 25 | Mary E. Bauer THIS PERSON | 63 | Head | — | Iowa |
| 26 | Bertha Bauer | 22 | Daughter | House Keeper | Iowa |
| 27 | G. V. Buttz | 31 | Head | Farmer | Iowa |
| 28 | Frances J. Buttz | 32 | Wife | House Wife | Iowa |
| 29 | Barney Enders | 40 | Head | Farmer | Iowa |
| 30 | Leona Enders | 35 | Wife | House Wife | Iowa |
| 31 | Geraldine M. Enders | 15 | Daughter | — | Iowa |
| 32 | Mervin Enders | 13 | Son | — | Iowa |
| 33 | Erma Enders | 12 | Daughter | — | Iowa |
| 34 | Cleo Enders | 10 | Son | — | Iowa |
| 35 | Niles Enders | 8 | Son | — | Iowa |
| 36 | Mary Enders | 3 | Daughter | — | Iowa |
| 37 | Leonard A. Hadle | 27 | Head | Farmer | Iowa |
| 38 | Irene Hadle | 29 | Wife | House Wife | Iowa |
| 39 | Leonard Jr. Hadle | 1 | Son | — | Iowa |
| 40 | Ray Hardman | 40 | Head | Miner | 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)