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.~1920), then head of a 5-person household.
Age 20
b. ~1920
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Grace |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Halethorpe - Arbutus pt |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Paint Store |
| Class of Worker | PW |
| Hours Worked | 6 |
| Income (1939) | 900 |
| Highest Grade | Hs 3 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Bookkeeper |
| Township / Ward | Halethorpe Arbutus Pt |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Joseph Grace | Son | — | 10 | ~1930 |
| George Grace | Head | — | 53 | ~1887 |
| Mary Grace | Spouse | — | 54 | ~1886 |
| Mary Grace | Daughter | — | 20 | ~1920 |
| Rose Grace | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Baltimore, Maryland
Daughter, age 9
Baltimore, Maryland · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | Mary C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| 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 20
Baltimore-County, Maryland · implied b. ~1920 — 5 household members
| Surname | Grace |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Halethorpe - Arbutus pt |
| 1935 Residence (County) | Baltimore |
| Occupation | Bookkeeper |
| Industry | Paint Store |
| Class of Worker | PW |
| Hours Worked | 6 |
| Income (1939) | 900 |
| Highest Grade | Hs 3 |
| 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 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 20 · b. ~1920 · Maryland
★ You are viewing this record
Sibling
Joseph Grace
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Grace
Sibling · 1940 · age 18
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-t0627-01506-00677)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice L. George C | 16 | Daughter | — | Maryland |
| 42 | Edna Louise George C | 14 | Daughter | — | Maryland |
| 43 | Esther Lois George C | 12 | Daughter | — | Maryland |
| 44 | Jacob F. Cooch | 39 | Head | Labor | Maryland |
| 45 | Rose M. Cooch | 32 | Wife | Housewife | Maryland |
| 46 | William F. Cooch | 9 | Son | — | Maryland |
| 47 | Nora E. Cooch | 7 | Daughter | — | Maryland |
| 48 | William J. Koch | 42 | Head | Helping | Maryland |
| 49 | Nora A. Koch | 33 | Wife | Labor | Maryland |
| 50 | George M. Vogel | 42 | Brother in law | Labor | Maryland |
| 51 | Henry J. Bergman | 63 | Head | Officer | Latvia |
| 52 | Margaret E. Bergman | 35 | Wife | Housewife | Maryland |
| 53 | Ruth M. Bergman | 10 | Daughter | — | Maryland |
| 54 | George J. Grace | 53 | Head | Painter | Maryland |
| 55 | Mary Cecilia Grace | 54 | Wife | Housewife | Maryland |
| 56 | Mary Ellen Grace THIS PERSON | 20 | Daughter | Bookkeeper | Maryland |
| 57 | Rose Ada Grace | 18 | Daughter | Bookkeeper | Maryland |
| 58 | Joseph L. Grace | 10 | Son | — | Maryland |
| 59 | Charles Wm. Lunt | 45 | Head | Chauffeur | Maryland |
| 60 | Bertie V. Lunt | 48 | Wife | Housewife | Maryland |
| 61 | Charles E. Sr. Pierson | 73 | Head | Machinist | Maryland |
| 62 | Clara M. Pierson | 73 | Wife | Housewife | Maryland |
| 63 | William J. Grace | 48 | Head | Part Painter | Maryland |
| 64 | Katherine R. Grace | 47 | Wife | Housewife | Maryland |
| 65 | Edward F. Grace | 24 | Son | Bookkeeper | Maryland |
| 66 | Joseph Grace | 22 | Son | Handy Man | Maryland |
| 67 | Christina A. Grace | 19 | Daughter | Clerk | Maryland |
| 68 | Thelma A. Grace | 17 | Daughter | — | Maryland |
| 69 | Edward Harryman | 37 | Head | Helper | Maryland |
| 70 | Emma Harryman | 36 | Wife | Housewife | Maryland |
| 71 | Edward L. Harryman | 15 | Son | — | Maryland |
| 72 | Roland Harryman | 14 | Son | — | Maryland |
| 73 | Doris Harryman | 13 | Daughter | — | Maryland |
| 74 | Betty Harryman | 10 | Daughter | — | Maryland |
| 75 | Eugene L. Dennis | 47 | Head | Keeper | Virginia |
| 76 | Catherine A. Dennis | 44 | Wife | Housewife | Maryland |
| 77 | Julia Galloway | 52 | Sister in law | — | Maryland |
| 78 | Herman L. Smith | 30 | Head | Trimmer | Maryland |
| 79 | Margaret C. Smith | 30 | Wife | Housewife | Maryland |
| 80 | Hugh H. Lindamond | 39 | Head | Machinist | Virginia |
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)