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Mary Mcmillan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sumter-County, South Carolina
Our Model Tree links this Mary Mcmillan across the 1930 and 1940 US Censuses in Sumter-County, South Carolina (XGBoost, ~Confirmed) — first a spouse (b.~1905), then head of a 13-person household.
Age 35
b. ~1905
Female
Spouse
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sumter-County, South Carolina |
| Surname | McMillan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (County) | Sumter |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | 0 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Sumter 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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mattie Mcmillan | Daughter | — | 4 | ~1936 |
| Cleveland Jenkins | Other | — | 16 | ~1924 |
| Joseph Mcmillan | Son | — | 7 | ~1933 |
| Sara Mcmillan | Daughter | — | 14 | ~1926 |
| Rebecca Jenkins | Other | — | 40 | ~1900 |
| Hattie Mcmillan | Daughter | — | 5 | ~1935 |
| Solomon Mcmillan | Son | — | 12 | ~1928 |
| Solomon Jenkins | Other | — | 56 | ~1884 |
| Joe Mcmillan | Head | — | 35 | ~1905 |
| Amelia Mcmillan | Daughter | — | 10 | ~1930 |
| Mary Mcmillan | Spouse | — | 35 | ~1905 |
| Gardenia Mcmillan | Daughter | — | 8 | ~1932 |
| Catharine Mcmillan | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Sumter, South …
Spouse, age 20
Sumter, South Carolina · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMillan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 14 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laundress |
| Industry | At Home |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Sumter-County, South …
Spouse, age 35
Sumter-County, South Carolina · implied b. ~1905 — 13 household members
| Surname | McMillan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (County) | Sumter |
| Highest Grade | H 1 |
| 1935 Residence | 0 |
| 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 Mcmillan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcmillan
Spouse · 1940 · age 35 · b. ~1905 · South Carolina
★ 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 — Sumter-County, South Carolina
Open full size
1940 US Federal Census — Sumter-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03842-00692)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Barbara Copeland | 6 | daughter | — | South Carolina |
| 2 | Palmetine Copeland | 5 | Son | — | South Carolina |
| 3 | Kenneth Copeland | 2 | Son | — | South Carolina |
| 4 | Bernice Copeland | 0 | daughter | — | South Carolina |
| 5 | Herbert Mccarley | 34 | Head | Farm | South Carolina |
| 6 | Nancy Mccarley | 32 | Wife | — | South Carolina |
| 7 | Earnest Edwards | 40 | Head | Farm | South Carolina |
| 8 | Paul Edwards | 29 | Brother | Farm | South Carolina |
| 9 | Sara Edwards | 13 | Sister | — | South Carolina |
| 10 | Jane Edwards | 77 | mother | — | South Carolina |
| 11 | Roosevelt Mccarley | 33 | Head | Farm | South Carolina |
| 12 | Tiny Mccarley | 19 | Wife | — | South Carolina |
| 13 | Roosevelt Mccarley | 1 | Son | — | South Carolina |
| 14 | Joe Mcmillan | 35 | Head | Farm | South Carolina |
| 15 | Mary Mcmillan THIS PERSON | 35 | Wife | — | South Carolina |
| 16 | Catharine Mcmillan | 15 | daughter | — | South Carolina |
| 17 | Sara Mcmillan | 14 | daughter | — | South Carolina |
| 18 | Solomon Mcmillan | 12 | Son | — | South Carolina |
| 19 | Amelia Mcmillan | 10 | daughter | — | South Carolina |
| 20 | Gardenia Mcmillan | 8 | daughter | — | South Carolina |
| 21 | Joseph Mcmillan | 7 | Son | — | South Carolina |
| 22 | Hattie Mcmillan | 5 | daughter | — | South Carolina |
| 23 | Mattie Mcmillan | 4 | daughter | — | South Carolina |
| 24 | Solomon Jenkins | 56 | Father-in-law | Farm | South Carolina |
| 25 | Rebecca Jenkins | 40 | Mother-in-law | — | South Carolina |
| 26 | Cleveland Jenkins | 16 | Brother-in-law | Farm | South Carolina |
| 27 | Vernie P. Watts | 44 | Head | Farm | South Carolina |
| 28 | Ethel Watts | 44 | Wife | — | South Carolina |
| 29 | Carla Mae Watts | 14 | daughter | — | South Carolina |
| 30 | Alton Watts | 12 | Son | — | South Carolina |
| 31 | Mary Jones | 73 | Mother-in-law | — | South Carolina |
| 32 | Anna J. Watts | 73 | Head | Farm | South Carolina |
| 33 | Martha Watts | 37 | daughter | — | South Carolina |
| 34 | Hardy | 30 | Head | Farm | South Carolina |
| 35 | Ruby Hardy | 27 | daughter | — | South Carolina |
| 36 | Donald Hardy | 6 | grandson | — | South Carolina |
| 37 | Clark Hardy | 4 | grandson | — | South Carolina |
| 38 | James Baker | 19 | Head | Farm | South Carolina |
| 39 | Mary Baker | 19 | Wife | — | South Carolina |
| 40 | James Jr Baker | 2 | 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)