MS
Mary Schroeder — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this Mary Schroeder across the 1920, 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed), with identified parents Peter & Elizabeth — first a daughter (b.~1908), then head of a 2-person household.
Age 32
b. ~1908
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | Schroeder |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Balltown Town |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Balltown Town |
| Est. Birth Year | ~1908 |
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 |
|---|---|---|---|---|
| Mary Schroeder | Daughter | — | 32 | ~1908 |
| Elizabeth Schroeder | Head | — | 70 | ~1870 |
Census Appearances
1920
Dubuque, Iowa
Daughter, age 10
Dubuque, Iowa · implied b. ~1910 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schroeder |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dubuque, Iowa
Daughter, age 21
Dubuque, Iowa · implied b. ~1909 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schroeder |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Daughter, age 32
Dubuque-County, Iowa · implied b. ~1908 — 2 household members
| Surname | Schroeder |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Balltown Town |
| 1935 Residence (County) | Dubuque |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| 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 Schroeder across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Peter Schroeder (~0.92 confidence) and mother Elizabeth Schroeder (~0.92 confidence) and mother Elizabeth Schroeder (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Schroeder
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Schroeder
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Schroeder
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Schroeder
Daughter · 1940 · age 32 · b. ~1908 · 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 — Dubuque-County, Iowa
Open full size
1940 US Federal Census — Dubuque-County, Iowa
Page Contents
16 people indexed on this census page (nara:1940:m-t0627-01158-00292)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sister M Dennison | 71 | Head | Teacher | Iowa |
| 42 | Sister M Aloysius | 39 | Servant | Teacher | Iowa |
| 43 | Sister M Stella | 21 | Servant | Teacher | Iowa |
| 44 | Sister M Henrica | 28 | Servant | Teacher | Iowa |
| 45 | Elizabeth Schroeder | 70 | Head | — | Iowa |
| 46 | Mary Schroeder THIS PERSON | 32 | Daughter | — | Iowa |
| 47 | Victor J Breitbach | 45 | Head | Merchant | Iowa |
| 48 | Monica Breitbach | 42 | Wife | — | Iowa |
| 49 | Eulalia Breitbach | 17 | Daughter | — | Iowa |
| 50 | Margaret M Breitbach | 17 | Daughter | — | Iowa |
| 51 | William M Breitbach | 14 | Son | Salesman | Iowa |
| 52 | Monica D Breitbach | 12 | Daughter | — | Iowa |
| 53 | Victor J Breitbach | 9 | Son | — | Iowa |
| 54 | Thomas T Breitbach | 5 | Son | — | Iowa |
| 55 | Mary Jane Breitbach | 1 | Daughter | — | Iowa |
| 56 | Dorothy Schroeder | 27 | In law | Sales Lady | Iowa |
Pedigree Summary
Mary
Gen 1 · 3 parents
~0.92
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)