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Mary Hart — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Hart across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 2-person household.
Age 60
b. ~1880
Female
Head
Born: Maryland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore |
| Est. Birth Year | ~1880 |
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 Hart | Head | — | 60 | ~1880 |
| George Hart | Son | — | 35 | ~1905 |
Census Appearances
1920
Baltimore, Maryland
Spouse, age 40
Baltimore, Maryland · implied b. ~1880 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Butler |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Spouse, age 50
Baltimore, Maryland · implied b. ~1880 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 23 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 60
Baltimore-City-County, Maryland · implied b. ~1880 — 2 household members
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 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 Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hart
Head · 1940 · age 60 · b. ~1880 · Maryland
★ 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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01511-00633)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Johnson | 56 | Head | — | Maryland |
| 42 | William Johnson | 27 | Son | Laborer | Maryland |
| 43 | William Spade | 50 | Head | Laborer | Pennsylvania |
| 44 | Hattie Kumlehn | 58 | Head | Cat. Drinker | Maryland |
| 45 | Katherine Orwig | 72 | Head | — | Maryland |
| 46 | Edwin Orwig | 71 | Husband | — | Pennsylvania |
| 47 | Frank Nelson | 33 | Head | Rigger | Sweden |
| 48 | Mildred Nelson | 33 | Wife | — | Maryland |
| 49 | John Nelson | 11 | Son | — | Maryland |
| 50 | Mary Nelson | 9 | Daughter | — | Maryland |
| 51 | Astrid Nelson | 1 | Daughter | — | Maryland |
| 52 | Katherine Berker | 28 | Head | — | Maryland |
| 53 | William Berker | 34 | Husband | Truck Driver | Maryland |
| 54 | Patrick Ryan | 28 | Lodger | Bookkeeper | Ireland |
| 55 | Edward Weneck | 25 | Head | Street Dept | Maryland |
| 56 | Rubie Weneck | 31 | Wife | — | Vermont |
| 57 | Bernard Hughes | 9 | Son | — | New York |
| 58 | Edward Jr. Weneck | 3 | Son | — | Maryland |
| 59 | Margaret Weneck | 2 | Daughter | — | Maryland |
| 60 | John Mastercola | 47 | Head | Truck Driver | Maryland |
| 61 | Anna Mastercola | 39 | Wife | — | Tennessee |
| 62 | Lucille Mastercola | 9 | Daughter | — | Maryland |
| 63 | Mary Hart THIS PERSON | 60 | Head | — | Maryland |
| 64 | George U. Hart | 35 | Son | Lineman | Maryland |
| 65 | John George De George | 36 | Head | Laborer | Maryland |
| 66 | Marie De George | 26 | Wife | — | Maryland |
| 67 | Suzanne De George | 6 | Daughter | — | Maryland |
| 68 | Ella De George | 3 | Daughter | — | Maryland |
| 69 | George A. De George | 0 | Son | — | Maryland |
| 70 | Elias Kraus | 36 | Head | Dough-Mixer | Germany |
| 71 | Margaret Kraus | 35 | Wife | — | Germany |
| 72 | Joseph Kraus | 10 | Son | — | Maryland |
| 73 | Anna Kraus | 8 | Daughter | — | Maryland |
| 74 | Marie Kraus | 5 | Daughter | — | Maryland |
| 75 | Joseph Kraus | 31 | Head | Oven-Hand | Maryland |
| 76 | Eva Kraus | 28 | Wife | — | Maryland |
| 77 | Ann Marie Kraus | 9 | Daughter | — | Maryland |
| 78 | Frederick Kraus | 6 | Son | — | Maryland |
| 79 | Katherine Mcgovern | 48 | Head | Janitress | Maryland |
| 80 | Anna Mcgovern | 19 | Daughter | Helper | 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)