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Mary Hartman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Hartman across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 2-person household.
Age 66
b. ~1874
Female
Head
Born: Maryland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Hartman |
| Given Name | Mary C |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Balto City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Grocery store |
| Industry | Own |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 566 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Grocery Store |
| Township / Ward | Balto City |
| Est. Birth Year | ~1874 |
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 |
|---|---|---|---|---|
| Helen Hartman | Daughter | — | 44 | ~1896 |
| Mary Hartman | Head | — | 66 | ~1874 |
Census Appearances
1920
Baltimore, Maryland
Head, age 46
Baltimore, Maryland · implied b. ~1874 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | Mary E |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Industry | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Other, age 56
Baltimore, Maryland · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | Mary E. |
| Relationship to Head | HEAD-H |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Proprietor |
| Industry | Grocery Store |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 9000 |
| Radio Set | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 66
Baltimore-City-County, Maryland · implied b. ~1874 — 2 household members
| Surname | Hartman |
| Given Name | Mary C |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Balto City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Grocery store |
| Industry | Own |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 566 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| 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 Hartman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hartman
Head · 1940 · age 66 · b. ~1874 · 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
39 people indexed on this census page (nara:1940:m-t0627-01539-00293)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen Mulgrew | 15 | Niece | — | Maryland |
| 2 | Margaret Ward | 38 | Cousin | Genl Clerk | Maryland |
| 3 | George Reinhardt | 58 | Head | Bookkeeper | Maryland |
| 4 | Beulah Reinhardt | 49 | Wife | — | Maryland |
| 5 | Beverly M Reinhardt | 24 | Son | Sales Clerk | Maryland |
| 6 | Betty S Reinhardt | 11 | Daughter | — | Maryland |
| 7 | John A Aterlock | 44 | Head | Prop. & Tender | Pennsylvania |
| 8 | Ethel Aterlock | 42 | Wife | — | Maryland |
| 9 | Allen Aterlock | 19 | Son | — | Maryland |
| 10 | Earl Aterlock | 18 | Son | — | Maryland |
| 11 | Howard Aterlock | 14 | Son | — | Maryland |
| 12 | John J Enoch | 40 | Head | Manager | Pennsylvania |
| 13 | Frances Enoch | 37 | Wife | — | Maryland |
| 14 | Elizabeth Enoch | 14 | Daughter | — | Pennsylvania |
| 15 | John J Jr Enoch | 12 | Son | — | Pennsylvania |
| 16 | Joseph R Noel | 33 | Head | Auditor | Maryland |
| 17 | Agnes C Noel | 37 | Wife | — | Maryland |
| 18 | Mary D Noel | 7 | Daughter | — | Maryland |
| 19 | Mary C Hartman THIS PERSON | 66 | Head | Grocery Store | Maryland |
| 20 | Helen R Hartman | 44 | Daughter | — | Maryland |
| 21 | Walter J Stead | 44 | Head | Draftsman | Pennsylvania |
| 22 | Gladys Stead | 40 | Wife | Nurse | Pennsylvania |
| 23 | Donald G Stead | 9 | Son | — | Pennsylvania |
| 24 | Deloras Stead | 7 | Daughter | — | Pennsylvania |
| 25 | Albert J Mcfadden | 38 | Head | Fireman | Maryland |
| 26 | Emmeline Mcfadden | 40 | Wife | — | Maryland |
| 27 | Alice E Mcfadden | 15 | Daughter | — | Maryland |
| 28 | Emma H Mcfadden | 14 | Daughter | — | Maryland |
| 29 | Harvey G Marlow | 37 | Head | Construct. Engineer | Kansas |
| 30 | Margaret Marlow | 26 | Wife | — | Maryland |
| 31 | John P Marlow | 13 | Son | — | California |
| 32 | Ray C Marlow | 14 | Son | — | California |
| 33 | E. Sadler & Wilson | 50 | Head | Auto Parts | Maryland |
| 34 | Mary Sadler & Wilson | 46 | Wife | — | Maryland |
| 35 | Weaver May Sadler & Wilson | 20 | Step dau | Telephone Opr | Maryland |
| 36 | Mary C Sadler & Wilson | 17 | Step dau | — | Maryland |
| 37 | Connor Paul Sadler & Wilson | 44 | Boarder | — | Maryland |
| 38 | Elias Cole | 44 | Head | Grocery Store | Maryland |
| 39 | Margaret Cole | 42 | Wife | Stenographer | New York |
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)