MP
Mary Porter — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, South Carolina
Our Model Tree links this Mary Porter across the 1930 and 1940 US Censuses in Union-County, South Carolina (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 12-person household.
Age 23
b. ~1917
Female
Daughter
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, South Carolina |
| Surname | Porter |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 23 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Santuc Township |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 30 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Laborer |
| Township / Ward | Santuc Township |
| Est. Birth Year | ~1917 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Carrie Porter | Daughter | — | 7 | ~1933 |
| Mary Porter | Daughter | — | 23 | ~1917 |
| Rosa Porter | Daughter | — | 10 | ~1930 |
| Elizabeth Porter | Daughter | — | 11 | ~1929 |
| Altonia Porter | Daughter | — | 14 | ~1926 |
| Elmira Porter | Daughter | — | 19 | ~1921 |
| Corrie Porter | Daughter | — | 7 | ~1933 |
| Grant Porter | Head | — | 67 | ~1873 |
| Moses Porter | Son | — | 10 | ~1930 |
| John Porter | Son | — | 17 | ~1923 |
| George Porter | Son | — | 21 | ~1919 |
| Marie Porter | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Union, South …
Daughter, age 15
Union, South Carolina · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Porter |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Farm Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Union-County, South …
Daughter, age 23
Union-County, South Carolina · implied b. ~1917 — 12 household members
| Surname | Porter |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 23 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Santuc Township |
| 1935 Residence (County) | Union |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 30 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| 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 Porter across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Porter
Daughter · 1940 · age 23 · b. ~1917 · South Carolina
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Sibling
Rosa Porter
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Corrie Porter
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Porter
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carrie Porter
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Moses Porter
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Porter
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elmira Porter
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Porter
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Altonia Porter
Sibling · 1940 · age 14
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 — Union-County, South Carolina
Open full size
1940 US Federal Census — Union-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03843-00482)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gladys Adams | 21 | Daughter | — | South Carolina |
| 2 | Harold Adams | 19 | Son | Laborer | South Carolina |
| 3 | Dorothy Adams | 17 | Daughter | — | South Carolina |
| 4 | Bob Adams | 14 | Son | — | South Carolina |
| 5 | Rebecca Adams | 9 | Daughter | — | South Carolina |
| 6 | Isaac D. Thompson | 52 | Head | Farmer | South Carolina |
| 7 | Hattie Thompson | 40 | Sister | Laborer | South Carolina |
| 8 | James Thompson | 18 | Adopted Child | Laborer | South Carolina |
| 9 | J. J. Hampton | 23 | Head | Farmer | South Carolina |
| 10 | Sara Hampton | 22 | Wife | Laborer | South Carolina |
| 11 | Eddie Hampton | 5 | Son | — | South Carolina |
| 12 | J. J. Jr. Hampton | 1 | Son | — | South Carolina |
| 13 | James Hampton | 23 | Head | Farmer | South Carolina |
| 14 | Mary Hampton | 20 | Wife | Laborer | South Carolina |
| 15 | Inly Hampton | 1 | Daughter | — | South Carolina |
| 16 | Dennis Norman | 58 | Head | Farmer | South Carolina |
| 17 | Agusta Norman | 46 | Wife | Laborer | South Carolina |
| 18 | Dennis Jr. Norman | 16 | Son | Laborer | South Carolina |
| 19 | Clara Norman | 13 | Daughter | — | South Carolina |
| 20 | Rufus Norman | 10 | Son | — | South Carolina |
| 21 | Silas Peek | 14 | Step Son | Laborer | South Carolina |
| 22 | Eddie Ab Peek | 17 | Step Daughter | Laborer | South Carolina |
| 23 | Isabelle Ab Peek | 16 | Step Daughter | Laborer | South Carolina |
| 24 | Clara Porter | 46 | Head | — | South Carolina |
| 25 | Etta Porter | 25 | Daughter | — | South Carolina |
| 26 | Elsie Porter | 15 | Granddaughter | — | South Carolina |
| 27 | Robert Porter | 12 | Grandson | — | South Carolina |
| 28 | Jessie Porter | 8 | Grandson | — | South Carolina |
| 29 | Grant Porter | 67 | Head | — | South Carolina |
| 30 | Marie Porter | 42 | Wife | Laborer | South Carolina |
| 31 | Mary Porter THIS PERSON | 23 | Daughter | Laborer | South Carolina |
| 32 | George Porter | 21 | Son | Laborer | South Carolina |
| 33 | Elmira Porter | 19 | Daughter | Laborer | South Carolina |
| 34 | John Porter | 17 | Son | Laborer | South Carolina |
| 35 | Altonia Porter | 14 | Daughter | Laborer | South Carolina |
| 36 | Elizabeth Porter | 11 | Daughter | — | South Carolina |
| 37 | Rosa Porter | 10 | Daughter | — | South Carolina |
| 38 | Moses Porter | 10 | Son | — | South Carolina |
| 39 | Corrie Porter | 7 | Daughter | — | South Carolina |
| 40 | Carrie Porter | 7 | Daughter | — | 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)