MC
Mary Carroll — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Carroll across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1884), then head of a 3-person household.
Age 56
b. ~1884
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Carroll |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | St Mary's |
| 1935 Residence (County) | St Mary's |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Est. Birth Year | ~1884 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Francis Carroll | Daughter | — | 5 | ~1935 |
| Clement Carroll | Head | — | 63 | ~1877 |
| Mary Carroll | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Philadelphia, Pennsylvania
Other, age 42
Philadelphia, Pennsylvania · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Servant |
| Industry | Private |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Philadelphia, Pennsylvania
Other, age 51
Philadelphia, Pennsylvania · implied b. ~1879 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | Cousin |
| Sex | F |
| Color / Race | Black |
| Age | 51 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | General Housework |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Philadelphia-County, Pennsylvania
Spouse, age 56
Philadelphia-County, Pennsylvania · implied b. ~1884 — 3 household members
| Surname | Carroll |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | St Mary's |
| 1935 Residence (County) | St Mary's |
| Class of Worker | 0 |
| Highest Grade | No 4 |
| 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 Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Carroll
Spouse · 1940 · age 56 · b. ~1884 · Pennsylvania
★ 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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03704-00038)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James, G. Betty | 7 | Son | — | Penna |
| 42 | Jane Williams | 88 | Grandmother | — | Wales |
| 43 | Richard Thompson | 70 | Roomer | Surveyor | New Jersey |
| 44 | Martha Wandell | 67 | Head | — | Penna |
| 45 | G. W. Wandell | 32 | Son | Salesman | Penna |
| 46 | Joseph Applin | 60 | Head | Salesman | Penna |
| 47 | Ada S. Applin | 40 | Wife | Bookkeeper | Penna |
| 48 | James J. O'Connor | 56 | Head | Weaver | New York |
| 49 | Amelia O'Connor | 51 | Wife | Housework | Penna |
| 50 | Harry Jos. O'Connor | 25 | Son | Truck Driver | Penna |
| 51 | In Hospital | None | — | — | — |
| 52 | Cancelled | None | — | — | — |
| 53 | Walter R. Hansell | 65 | Head | Foreman | Penna |
| 54 | Mrs Boyle | 36 | Daughter | — | Penna |
| 55 | Margaret Hansell | 34 | Daughter | Sales Girl | Penna |
| 56 | Charles Boyle | 15 | Grandson | — | Penna |
| 57 | Elizabeth Boyle | 13 | Granddaughter | — | Penna |
| 58 | Jerry Boyle | 11 | Grandson | — | Penna |
| 59 | Margaret M. Boyle | 9 | Granddaughter | — | Penna |
| 60 | John M. Dyson | 27 | Head | Baker | Penna |
| 61 | Mary Jane Dyson | None | Mother | — | Penna |
| 62 | E. Mae Dyson | 23 | Sister | Waitress | Penna |
| 63 | Jean Tuckey | 25 | Roomer | Waitress | Penna |
| 64 | Arthur Washington | 26 | Head | Butler | Penna |
| 65 | John Washington | 26 | Brother | Laborer | Penna |
| 66 | Archie Washington | 19 | Brother | Laborer | Penna |
| 67 | Henrietta Doyle | 17 | Sister | — | Penna |
| 68 | Jessie L. Pinchum | 6 | Niece | — | Penna |
| 69 | Clement Carroll | 63 | Head | Laborer | Maryland |
| 70 | Mary L. Carroll THIS PERSON | 56 | Wife | — | Maryland |
| 71 | Francis Marie Carroll | 5 | Daughter | — | Penna |
| 72 | Jessie Wilson | 57 | Head | Housework | Kentucky |
| 73 | Bernice Day | 30 | Boarder | — | Penna |
| 74 | Dolores Day | 11 | Boarder | — | Penna |
| 75 | Charles Thomas | 49 | Head | Laborer | Maryland |
| 76 | Mary Thomas | 45 | Wife | — | Maryland |
| 77 | Loretta Richardson | 27 | Daughter | Companion | Maryland |
| 78 | Fred Pinkett | 48 | Roomer | Laborer | Maryland |
| 79 | Gertrude Greenwood | 40 | Head | — | S. Carolina |
| 80 | Evelyn Greenwood | 23 | Daughter | — | S. Carolina |
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)