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Mary Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Mason across the 1910, 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 5-person household.
Age 55
b. ~1885
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Mason |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1885 |
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 |
|---|---|---|---|---|
| Lemuel Mason | Head | — | 58 | ~1882 |
| Catherine Stallings | Other | — | 23 | ~1917 |
| William Stallings | Other | — | 24 | ~1916 |
| Albert Mason | Son | — | 26 | ~1914 |
| Mary Mason | Spouse | — | 55 | ~1885 |
Census Appearances
1910
Baltimore, Maryland
Other, age 25
Baltimore, Maryland · implied b. ~1885 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Mary |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Cook |
| Industry | Private family |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Baltimore, Maryland
Other, age 36
Baltimore, Maryland · implied b. ~1884 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Mary |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | Black |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Maid |
| 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 45
Baltimore, Maryland · implied b. ~1885 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 28 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Spouse, age 55
Baltimore-City-County, Maryland · implied b. ~1885 — 5 household members
| Surname | Mason |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Class of Worker | 0 |
| Highest Grade | H-7 |
| 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 Mason across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mason
Spouse · 1940 · age 55 · b. ~1885 · 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-t0627-01513-00371)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marie Utterbaugh | 21 | Wife | Clerk | Maryland |
| 2 | Ralph Mcfaul | 40 | Head | Case Maker | Maryland |
| 3 | Marie A. Mcfaul | 50 | Wife | — | Maryland |
| 4 | William Ruby | 26 | Head | Mechanic | Maryland |
| 5 | Hazel D. Ruby | 22 | Wife | — | Maryland |
| 6 | Margaret Sanders | 60 | Head | — | Maryland |
| 7 | Joseph L. Combs | 53 | Head | Tailor | Maryland |
| 8 | Eleanor E. Combs | 49 | Wife | — | Maryland |
| 9 | Joseph L. Jr. Combs | 23 | Son | Phar | Maryland |
| 10 | Viola Battalora | 50 | Head | — | Maryland |
| 11 | Dorothy Cottrell | 20 | Daughter | Clerk | Maryland |
| 12 | Mary Lee Cottrell | 3 | Grand Daughter | — | Maryland |
| 13 | Lemuel D. Mason | 58 | Head | Watchman | Maryland |
| 14 | Mary C. Mason THIS PERSON | 55 | Wife | — | Maryland |
| 15 | Albert J. Mason | 26 | Son | Clerk | Maryland |
| 16 | Catherine Stallings | 23 | Boarder | Clerk | Maryland |
| 17 | William C. Stallings | 24 | Boarder | Salesman | Maryland |
| 18 | John W. Leef | 34 | Head | Manager | Maryland |
| 19 | Florence Leef | 34 | Wife | — | Maryland |
| 20 | Dolores Leef | 13 | Daughter | — | Maryland |
| 21 | John Leef | 5 | Son | — | Maryland |
| 22 | John Mcallister | 45 | Boarder | Salesman | Maryland |
| 23 | Marie Mcallister | 45 | Boarder | — | Maryland |
| 24 | Grace Goodwin | 21 | Niece | — | Maryland |
| 25 | Louis Wiseman | 45 | Head | Sheet Metal | Maryland |
| 26 | Elizabeth Wiseman | 43 | Wife | — | Maryland |
| 27 | Leroy L. Wiseman | 18 | Son | Repairman | Maryland |
| 28 | Edward Wiseman | 13 | Son | — | Maryland |
| 29 | Thomas Mager | 31 | Lodger | Sheet Metal | Maryland |
| 30 | Elizabeth Mager | 32 | Lodger | — | Maryland |
| 31 | Thomas L. Mager | 5 | Lodger | — | Maryland |
| 32 | James Leroy Mager | 0 | Lodger | — | Maryland |
| 33 | Charles Jones | 59 | Head | Salesman | Maryland |
| 34 | Irene Jones | 48 | Wife | — | Maryland |
| 35 | Nelson Jones | 23 | Son | Clerk | Maryland |
| 36 | Ella Arrey | 53 | Sister-in-law | — | Maryland |
| 37 | William H. Sanford | 40 | Head | Manager | Virginia |
| 38 | Mary Grace Sanford | 39 | Wife | — | Virginia |
| 39 | John Swan | 36 | Head | Gardner | Scotland |
| 40 | Josephine Swan | 41 | Wife | — | 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)