MW
Mary Wallace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sumter-County, South Carolina
Our Model Tree links this Mary Wallace across the 1920, 1930 and 1940 US Censuses in Sumter-County, South Carolina (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 3-person household.
Age 38
b. ~1902
Female
Spouse
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sumter-County, South Carolina |
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Sumter |
| 1935 Residence (County) | Sumter |
| Additional Details | |
| Occupation | Laundress |
| Industry | At home |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 108 |
| Highest Grade | No 7 |
| 1935 Residence | Samehouse |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Laundress |
| Township / Ward | Sumter |
| Est. Birth Year | ~1902 |
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 |
|---|---|---|---|---|
| Jessie Wallace | Daughter | — | 20 | ~1920 |
| Joe Wallace | Head | — | 42 | ~1898 |
| Mary Wallace | Spouse | — | 38 | ~1902 |
Census Appearances
1920
Sumter, South …
Spouse, age 25
Sumter, South Carolina · implied b. ~1895 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Sumter, South …
Spouse, age 30
Sumter, South Carolina · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 18 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Laundress |
| Industry | At Home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Sumter-County, South …
Spouse, age 38
Sumter-County, South Carolina · implied b. ~1902 — 3 household members
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Sumter |
| 1935 Residence (County) | Sumter |
| Occupation | Laundress |
| Industry | At home |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 108 |
| Highest Grade | No 7 |
| 1935 Residence | Samehouse |
| 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 Wallace across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Wallace
Spouse · 1940 · age 38 · b. ~1902 · 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-t0627-03842-00260)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sarah Pringle | 17 | daughter | — | South Carolina |
| 2 | James Pringle | 13 | son | — | South Carolina |
| 3 | Perrin Myron Pringle | 12 | grandson | — | South Carolina |
| 4 | Joe Wallace | 42 | Head | Carpenter | South Carolina |
| 5 | Mary Wallace THIS PERSON | 38 | wife | Laundress | South Carolina |
| 6 | Jessie May Wallace | 20 | daughter | — | South Carolina |
| 7 | Ruth Nelson | 38 | Head | Laundress | South Carolina |
| 8 | Douglas Nelson | 17 | son | Laborer | South Carolina |
| 9 | Laurine Pearson | 21 | daughter | Laundress | South Carolina |
| 10 | Lottie Scott | 27 | Head | Laborer | South Carolina |
| 11 | Wilhemia Scott | 25 | wife | Cook | South Carolina |
| 12 | Charlie Scott | 5 | son | — | South Carolina |
| 13 | Joe Louis Scott | 3 | son | — | South Carolina |
| 14 | Pauline Rhemus | 47 | mother-in-law | Laundress | South Carolina |
| 15 | George Brown | 30 | Head | Laborer | South Carolina |
| 16 | Lucile Brown | 20 | wife | — | South Carolina |
| 17 | Janis Landre | 19 | lodger | — | South Carolina |
| 18 | Susie Richardson | 17 | lodger | — | South Carolina |
| 19 | Rosa Richardson | 16 | lodger | — | South Carolina |
| 20 | Eisnel Smith | 60 | Head | Night Watchman | South Carolina |
| 21 | Rosazetta Smith | 49 | wife | Laundress | South Carolina |
| 22 | — | None | — | — | — |
| 23 | Loyd Gerry | 21 | Head | Helper | South Carolina |
| 24 | Sadie Gerry | 20 | wife | — | South Carolina |
| 25 | Ella Shinds | 40 | Head | Laundress | South Carolina |
| 26 | Joseph Maple | 26 | Head | Laborer | South Carolina |
| 27 | Lucile Maple | 23 | wife | Laundress | South Carolina |
| 28 | Mary Lee Maple | 6 | daughter | — | South Carolina |
| 29 | Joseph Jr. Maple | 3 | son | — | South Carolina |
| 30 | Emma A. Maple | 3 | daughter | — | South Carolina |
| 31 | James Maple | 2 | son | — | South Carolina |
| 32 | John Atkin | 45 | Head | Laborer | South Carolina |
| 33 | Emma Atkin | 35 | wife | — | South Carolina |
| 34 | Georgia Atkin | 13 | daughter | — | South Carolina |
| 35 | Essie May Atkin | 10 | daughter | — | South Carolina |
| 36 | Mary Chatman | 25 | Head | Laundress | South Carolina |
| 37 | Leroy Chatman | 3 | son | — | South Carolina |
| 38 | Joseph Brown | 7 | neph | — | South Carolina |
| 39 | Lewis Mcclery | 33 | brother | — | South Carolina |
| 40 | Elizabeth Grant | 24 | Head | Laundress | 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)