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Mary Muller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this Mary Muller across the 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Muller |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | sales clerk |
| Industry | bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 10 |
| Highest Grade | H-4 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Sales Clerk |
| Township / Ward | Election District 9 |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Muller | Son | — | 23 | ~1917 |
| Paul Muller | Head | — | 60 | ~1880 |
| Paul Muller | Son | — | 26 | ~1914 |
| Anna Muller | Spouse | — | 53 | ~1887 |
| Mary Muller | Daughter | — | 21 | ~1919 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 10
Baltimore, Maryland · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Miller |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Daughter, age 21
Baltimore-County, Maryland · implied b. ~1919 — 5 household members
| Surname | Muller |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore |
| Occupation | sales clerk |
| Industry | bakery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 10 |
| Highest Grade | H-4 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Muller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Muller
Daughter · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Paul Muller
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Muller
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01505-00141)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James James | 38 | Son-in-law | Salesman | Maryland |
| 2 | John Kalser | 18 | Boarder | Helper | Pennsylvania |
| 3 | Joseph Scheer | 46 | Head | Store Keeper | Maryland |
| 4 | Emma S. Scheer | 46 | Wife | Partner | Maryland |
| 5 | Charles Scheer | 22 | Son | Manager | Maryland |
| 6 | Joseph J. Scheer | 18 | Son | 6 | Maryland |
| 7 | Charles W. Marsh | 59 | Head | — | Maryland |
| 8 | Emma Marsh | 56 | Wife | — | Maryland |
| 9 | Charles J. Marsh | 31 | Son | — | Maryland |
| 10 | Hayden Marsh | 23 | Son | Florist | Maryland |
| 11 | Charles G. Stevens | 6 | Grandson | Helper | Maryland |
| 12 | Paul Muller | 60 | Head | Painter | Maryland |
| 13 | Anna M. Muller | 53 | Wife | — | Maryland |
| 14 | Paul A. Muller | 26 | Son | Truck Driver | Maryland |
| 15 | James J. Muller | 23 | Son | Helper | Maryland |
| 16 | Mary M. Muller THIS PERSON | 21 | Daughter | Sales Clerk | Maryland |
| 17 | Elizabeth D. Krause | 75 | Head | — | Maryland |
| 18 | Edwin Krause | 41 | Son | Doctor | Maryland |
| 19 | Lois Krause | 35 | Daughter | Sch. Teacher | Maryland |
| 20 | John Krause | 64 | Brother | — | Maryland |
| 21 | Claude Peeling | 61 | Head | Engineer | Pennsylvania |
| 22 | Linnie A. Peeling | 54 | Wife | — | Maryland |
| 23 | Kenneth Peeling | 22 | Son | — | Maryland |
| 24 | Harold Peeling | 20 | Son | Clerk | Maryland |
| 25 | William P. Krause | 42 | Head | Handy Man | Maryland |
| 26 | Sylvia Krause | 31 | Wife | Building Inspector | Maryland |
| 27 | William Krause | 5 | Son | — | Maryland |
| 28 | Rodger Krause | 3 | Son | — | Maryland |
| 29 | Norman Walter | 33 | Head | Machinist | Maryland |
| 30 | Mary S. Walter | 29 | Wife | — | Maryland |
| 31 | Norman Walter | 8 | Son | — | Maryland |
| 32 | Curtis D. Tyson | 57 | Head | Lawyer | Maryland |
| 33 | Rosa O. Tyson | 52 | Wife | Music Teacher | Maryland |
| 34 | John A. Coulter | 63 | Head | Florist | Maryland |
| 35 | Annie Coulter | 56 | Wife | — | Maryland |
| 36 | Charles W. Snyder | 67 | Head | Manager | Maryland |
| 37 | Lillie Snyder | 67 | Wife | — | Maryland |
| 38 | Thomas Mallowee | 58 | Brother-in-law | Manager | Maryland |
| 39 | Rudolf Schwanebeck | 55 | Head | Chauffer | Maryland |
| 40 | Helen Schwanebeck | 52 | Wife | — | Maryland |
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)