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Mary Mack — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Charleston-County, South Carolina
Our Model Tree links this Mary Mack across the 1930 and 1940 US Censuses in Charleston-County, South Carolina (XGBoost, ~Confirmed) — first a spouse (b.~1905), then head of a 9-person household.
Age 35
b. ~1905
Female
Spouse
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Charleston-County, South Carolina |
| Surname | Mack |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | James Island Township |
| 1935 Residence (County) | Charleston |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 24 |
| Income (1939) | 300 |
| Highest Grade | No 4 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Farmer |
| Township / Ward | James Island Township |
| Est. Birth Year | ~1905 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Oliver Mack | Son | — | 7 | ~1933 |
| Alex Mack | Head | — | 45 | ~1895 |
| Kit Mack | Son | — | 14 | ~1926 |
| Thelma Mack | Daughter | — | 11 | ~1929 |
| Lillian Mack | Daughter | — | 13 | ~1927 |
| Isaiah Mack | Son | — | 15 | ~1925 |
| Mary Mack | Spouse | — | 35 | ~1905 |
| Joseph Mack | Son | — | 14 | ~1926 |
| Richard Mack | Son | — | 6 | ~1934 |
Census Appearances
1930
Charleston, South …
Spouse, age 28
Charleston, South Carolina · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | Marie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 28 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 18 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laborer |
| Industry | Gen Farm |
| Class of Worker | W |
| Can Read/Write | No |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Charleston-County, South …
Spouse, age 35
Charleston-County, South Carolina · implied b. ~1905 — 9 household members
| Surname | Mack |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | James Island Township |
| 1935 Residence (County) | Charleston |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 24 |
| Income (1939) | 300 |
| Highest Grade | No 4 |
| 1935 Residence | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
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 Mack across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mack
Spouse · 1940 · age 35 · b. ~1905 · South Carolina
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Charleston-County, South Carolina
Open full size
1940 US Federal Census — Charleston-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03795-00443)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Barbara Ladson | 35 | Head | Farm Laborer | South Carolina |
| 2 | Alex Mack | 45 | Head | Laborer | South Carolina |
| 3 | Mary Mack THIS PERSON | 35 | Wife | Farmer | South Carolina |
| 4 | Isaiah Mack | 15 | Son | Servant | South Carolina |
| 5 | Joseph Mack | 14 | Son | Farm Laborer | South Carolina |
| 6 | Kit Mack | 14 | Son | Farm Laborer | South Carolina |
| 7 | Lillian Mack | 13 | Daughter | — | South Carolina |
| 8 | Thelma Mack | 11 | Daughter | — | South Carolina |
| 9 | Oliver Mack | 7 | Son | — | South Carolina |
| 10 | Richard Mack | 6 | Son | — | South Carolina |
| 11 | Westmore White | 39 | Head | Storekeeper | South Carolina |
| 12 | Rosalie White | 21 | Wife | Helper | South Carolina |
| 13 | Walter Watson | 45 | Head | Laborer | South Carolina |
| 14 | Mamie Watson | 41 | Wife | — | South Carolina |
| 15 | Ruth Watson | 19 | Daughter | Nurse | South Carolina |
| 16 | Corrine Watson | 16 | Cousin | Nurse | South Carolina |
| 17 | Benjamin Watson | 1 | Grandson | — | South Carolina |
| 18 | Rosa Ladson | 43 | Head | Farm Laborer | South Carolina |
| 19 | Cornelius Ladson | 24 | Daughter | Cook | South Carolina |
| 20 | Celia Ladson | 21 | Daughter | Farm Laborer | South Carolina |
| 21 | Joseph Ladson | 20 | Son | Driver | South Carolina |
| 22 | Harold Ladson | 14 | Son | Farm Laborer | South Carolina |
| 23 | Benjamin Ladson | 8 | Son | — | South Carolina |
| 24 | Betsy Ladson | 6 | Granddaughter | — | South Carolina |
| 25 | Joseph Ladson | 5 | Grandson | — | South Carolina |
| 26 | Allentha Ladson | 4 | Granddaughter | — | South Carolina |
| 27 | John H. Ladson | 2 | Grandson | — | South Carolina |
| 28 | Robert Ladson | 0 | Grandson | — | South Carolina |
| 29 | Arthur Ladson | 55 | Head | Farmer | South Carolina |
| 30 | Victoria Ladson | 44 | Wife | Farm Laborer | South Carolina |
| 31 | Ernestine Ladson | 14 | Daughter | — | South Carolina |
| 32 | Florence Ladson | 7 | Daughter | — | South Carolina |
| 33 | Robert Williams | 40 | Head | Janitor | South Carolina |
| 34 | Louise Williams | 25 | Wife | Laundress | South Carolina |
| 35 | Joe Walker | 32 | Head | Laborer | South Carolina |
| 36 | Matty Walker | 30 | Wife | — | South Carolina |
| 37 | Walter Walker | 13 | Son | — | South Carolina |
| 38 | Maybell Walker | 11 | Son | — | South Carolina |
| 39 | Dorothy Walker | 9 | Daughter | — | South Carolina |
| 40 | George Walker | 7 | Son | — | South 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)