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Mary Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this Mary Martin across the 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents Joshua & Francis — first a daughter (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Martin |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 9 |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Button Sewer |
| Industry | Wholesale Clothing Fac. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 196 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Button Sewer |
| Township / Ward | Election District 9 |
| Est. Birth Year | ~1899 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Bessie Martin | Daughter | — | 49 | ~1891 |
| Mary Martin | Daughter | — | 41 | ~1899 |
| Joshua Martin | Head | — | 75 | ~1865 |
| Francis Martin | Spouse | — | 75 | ~1865 |
Census Appearances
1920
Baltimore, Maryland
Other, age 20
Baltimore, Maryland · implied b. ~1900 — 33 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Mary |
| Relationship to Head | Pupil |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Pupil Nurse |
| Industry | Hospital |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 31
Baltimore, Maryland · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Machine shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Daughter, age 41
Baltimore-County, Maryland · implied b. ~1899 — 4 household members
| Surname | Martin |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 9 |
| 1935 Residence (County) | Baltimore |
| Occupation | Button Sewer |
| Industry | Wholesale Clothing Fac. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 196 |
| Highest Grade | No 8 |
| 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 Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joshua Martin (~0.92 confidence) and mother Francis Martin (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joshua Martin
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Francis Martin
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Martin
Daughter · 1940 · age 41 · b. ~1899 · Maryland
★ You are viewing this record
Sibling
Bessie Martin
Sibling · 1940 · age 49
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-t0627-01505-00350)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rosa E. Brookhart | 69 | Head | — | Maryland |
| 2 | Anna E. Wilson | 48 | Daughter | House Maid | Maryland |
| 3 | George S. Grimm | 32 | Head | Fireman | Maryland |
| 4 | Ida M. Grimm | 33 | Wife | — | Maryland |
| 5 | John S. Grimm | 7 | Son | — | Maryland |
| 6 | Joy M. Grimm | 5 | Daughter | — | Maryland |
| 7 | Cora E. Grimm | 3 | Daughter | — | Maryland |
| 8 | Germain P. Grimm | 1 | Son | — | Maryland |
| 9 | George L. Kates | 12 | Step-son | — | Maryland |
| 10 | George J. Smith | 56 | Head | Carpenter | Maryland |
| 11 | Annie I. Smith | 55 | Wife | — | Maryland |
| 12 | Charles E. Smith | 22 | Son | Machinist Hand | Maryland |
| 13 | Edgar T. Smith | 20 | Son | New Worker | Maryland |
| 14 | Helen E. Smith | 17 | Daughter | — | Maryland |
| 15 | Louis M. Beeker | 67 | Head | Pharmacist | Maryland |
| 16 | Mary I. Beeker | 35 | Wife | — | Maryland |
| 17 | Rose F. Beeker | 14 | Daughter | — | Maryland |
| 18 | Donald E. Beeker | 10 | Step-son | — | Maryland |
| 19 | Audrey M. Beeker | 9 | Daughter | — | Maryland |
| 20 | Louise C. Beeker | 6 | Daughter | — | Maryland |
| 21 | Mary L. Beeker | 5 | Daughter | — | Maryland |
| 22 | Dorthea A. Beeker | 2 | Daughter | — | Maryland |
| 23 | John H. Hammond | 33 | Head | Grocer | Maryland |
| 24 | Mildred L. Hammond | 33 | Wife | — | Maryland |
| 25 | James I. King | 26 | Head | Chauffeur | Virginia |
| 26 | Evelyn V. King | 24 | Wife | — | Virginia |
| 27 | Robert A. King | 4 | Son | — | Virginia |
| 28 | Edward E. Payne | 58 | Head | Engineer | Maryland |
| 29 | Ethel M. Payne | 55 | Wife | — | Maryland |
| 30 | Joshua T. Martin | 75 | Head | — | Maryland |
| 31 | Francis M. Martin | 75 | Wife | — | Maryland |
| 32 | Bessie E. Martin | 49 | Daughter | Clerical | Maryland |
| 33 | Mary S. Martin THIS PERSON | 41 | Daughter | Button Sewer | Maryland |
| 34 | James B. Perkin | 25 | Head | Chauffeur | W. Virginia |
| 35 | Sarah I. Perkin | 20 | Wife | — | Maryland |
| 36 | Barbara A. Perkin | 1 | Daughter | — | Maryland |
| 37 | Maggie M. Helatia | 59 | Mother-in-law | — | Maryland |
| 38 | Leon Hart | 39 | Head | Proprietor | Russia |
| 39 | Eye H. Hart | 31 | Wife | — | Maryland |
| 40 | Donald T. Hart | 7 | Son | — | Maryland |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)