MG
Mary Grace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this Mary Grace across the 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Grace |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Halethorpe - Arbutus pt. |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Automobiles |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 520 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Stenographer |
| Township / Ward | Halethorpe Arbutus Pt |
| Est. Birth Year | ~1922 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Philip Grace | Head | — | 41 | ~1899 |
| Margaret Grace | Daughter | — | 17 | ~1923 |
| Emma Grace | Daughter | — | 13 | ~1927 |
| Mary Grace | Daughter | — | 18 | ~1922 |
| Della Grace | Spouse | — | 39 | ~1901 |
| Elva Grace | Daughter | — | 10 | ~1930 |
| Philip Grace | Son | — | 5 | ~1935 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 8
Baltimore, Maryland · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | Margaret D |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Daughter, age 18
Baltimore-County, Maryland · implied b. ~1922 — 7 household members
| Surname | Grace |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Halethorpe - Arbutus pt. |
| 1935 Residence (County) | Baltimore |
| Occupation | Stenographer |
| Industry | Automobiles |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 520 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| 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 Grace across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Grace
Daughter · 1940 · age 18 · b. ~1922 · Maryland
★ You are viewing this record
Sibling
Emma Grace
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elva Grace
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philip Grace
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Grace
Sibling · 1940 · age 17
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-t0627-01506-00582)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edwin Gerhardt | 32 | Head | Clerk | Maryland |
| 2 | Louise Gerhardt | 31 | Wife | — | Maryland |
| 3 | Margaret Gerhardt | 5 | Daughter | — | Maryland |
| 4 | Michael Reitz | 68 | Father-in-law | — | Germany |
| 5 | Edward Reitz | 36 | Brother-in-law | — | Maryland |
| 6 | Margaret Reitz | 34 | Sister-in-law | Farmer | Maryland |
| 7 | Albert E. Smith | 48 | Head | Teacher | Maryland |
| 8 | Mary E. Smith | 72 | Mother | Handyman | Maryland |
| 9 | George W. Link | 53 | Head | Farmer | Maryland |
| 10 | Margaret X. Link | 59 | Wife | — | Maryland |
| 11 | Henrietta Link | 25 | Daughter | — | Maryland |
| 12 | Andy Lester | 39 | Head | Laborer | Tennessee |
| 13 | Rosie Lester | 35 | Wife | Waitress | Tennessee |
| 14 | Charles Johnson | 17 | Son | Laborer | Tennessee |
| 15 | John Lester | 15 | Son | Laborer | Tennessee |
| 16 | Philip Grace | 41 | Head | Laborer | Maryland |
| 17 | Della Grace | 39 | Wife | Bottler | Maryland |
| 18 | Mary Grace THIS PERSON | 18 | Daughter | Stenographer | Maryland |
| 19 | Margaret Grace | 17 | Daughter | — | Maryland |
| 20 | Emma Grace | 13 | Daughter | — | Maryland |
| 21 | Elva Grace | 10 | Daughter | — | Maryland |
| 22 | Philip Jr. Grace | 5 | Son | — | Maryland |
| 23 | Jessie X. Albright | 37 | Head | — | — |
| 24 | Joshua Albright | 15 | Son | — | — |
| 25 | Lillian Albright | 12 | Daughter | — | — |
| 26 | Daniel Shitch | 30 | Head | — | Maryland |
| 27 | William E. X. Shitch | 41 | Brother | Carpenter | Maryland |
| 28 | John J. Grace | 46 | Head | Filling Station | Maryland |
| 29 | Margaret B. Grace | 47 | Wife | — | Maryland |
| 30 | Rita Grace | 17 | Daughter | Mangle Operator | Maryland |
| 31 | Agnes Grace | 16 | Daughter | Mangle Operator | Maryland |
| 32 | Bernadette Grace | 14 | Daughter | — | Maryland |
| 33 | Francis Grace | 19 | Son | Assembler | Maryland |
| 34 | Anna Grace | 12 | Daughter | — | Maryland |
| 35 | Theresa Grace | 10 | Daughter | — | Maryland |
| 36 | Madeline Grace | 8 | Daughter | — | Maryland |
| 37 | John Jr. Grace | 3 | Son | — | Maryland |
| 38 | George Reinlein | 35 | Head | Pipe Fitter | Maryland |
| 39 | Anna Reinlein | 34 | Wife | Labeler | Maryland |
| 40 | Anna Margaret Reinlein | 12 | Daughter | — | 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)