MJ
Mamie Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, South Carolina
Our Model Tree links this Mamie Johnson across the 1930 and 1940 US Censuses in Marion-County, South Carolina (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Female
Daughter
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, South Carolina |
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Marion Town |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same Place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Marion Town |
| Est. Birth Year | ~1929 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mamie | Age | Birth yr |
|---|---|---|---|---|
| Mamie Johnson | Daughter | — | 11 | ~1929 |
| Anna Johnson | Daughter | — | 1 | ~1939 |
| Margaret Johnson | Daughter | — | 6 | ~1934 |
| Mazie Johnson | Daughter | — | 13 | ~1927 |
| Willie Johnson | Head | — | 54 | ~1886 |
| Thomas Johnson | Son | — | 14 | ~1926 |
| Wesley Johnson | Son | — | 22 | ~1918 |
| Willie Johnson | Son | — | 16 | ~1924 |
| James Johnson | Son | — | 9 | ~1931 |
| Georgeana Johnson | Spouse | — | 35 | ~1905 |
Census Appearances
1930
Marion, South …
Daughter, age 1
Marion, South Carolina · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Marion-County, South …
Daughter, age 11
Marion-County, South Carolina · implied b. ~1929 — 10 household members
| Surname | Johnson |
| Given Name | Mamie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Marion Town |
| 1935 Residence (County) | Marion |
| Highest Grade | 4 |
| 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 Mamie Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mamie Johnson
Daughter · 1940 · age 11 · b. ~1929 · South Carolina
★ You are viewing this record
Sibling
Willie Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Johnson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mazie Johnson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Johnson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Johnson
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wesley Johnson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Johnson
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 — Marion-County, South Carolina
Open full size
1940 US Federal Census — Marion-County, South Carolina
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03825-00201)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rosa Campbell | 23 | Daughter | School Teacher | South Carolina |
| 2 | Ernest Campbell | 18 | Son | Janitor | South Carolina |
| 3 | Olivia Campbell | 15 | Daughter | — | South Carolina |
| 4 | Vivian Campbell | 12 | Daughter | — | South Carolina |
| 5 | William Campbell | 10 | Son | — | South Carolina |
| 6 | Thelma Campbell | 8 | Daughter | — | South Carolina |
| 7 | Doris Campbell | 5 | Daughter | — | South Carolina |
| 8 | Arthur Moore | 36 | Head | Truck Driver | South Carolina |
| 9 | Rosa Moore | 34 | Wife | Maid | South Carolina |
| 10 | Burke Donnely | 53 | Head | Carpenter | South Carolina |
| 11 | Arnette Donnely | 44 | Wife | Laundress | South Carolina |
| 12 | Alonza Nichols | 32 | Head | Barber | South Carolina |
| 13 | Laura Mae Nichols | 27 | Wife | Operator | South Carolina |
| 14 | Oscar Nichols | 9 | Son | — | South Carolina |
| 15 | Barbara Nichols | 6 | Daughter | — | South Carolina |
| 16 | Rosa Cannon | 58 | Mother in Law | — | South Carolina |
| 17 | Willie Johnson | 54 | Head | Laborer | South Carolina |
| 18 | Georgeana Johnson | 35 | Wife | Maid | South Carolina |
| 19 | Wesley Johnson | 22 | Son | — | South Carolina |
| 20 | Willie Jr Johnson | 16 | Son | Delivery Boy | South Carolina |
| 21 | Thomas Johnson | 14 | Son | — | South Carolina |
| 22 | Mazie Lee Johnson | 13 | Daughter | — | South Carolina |
| 23 | Mamie Johnson THIS PERSON | 11 | Daughter | — | South Carolina |
| 24 | James Johnson | 9 | Son | — | South Carolina |
| 25 | Margaret Johnson | 6 | Daughter | — | South Carolina |
| 26 | Anna Johnson | 1 | Daughter | — | South Carolina |
| 27 | Lonnie Clark | 29 | Head | Truck Driver | South Carolina |
| 28 | Montana Clark | 25 | Wife | — | South Carolina |
| 29 | Dora Lee Clark | 15 | Daughter | — | South Carolina |
| 30 | Harris Clark | 13 | Son | — | South Carolina |
| 31 | Marion Clark | 12 | Son | — | South Carolina |
| 32 | James Clark | 10 | Son | — | South Carolina |
| 33 | Simon Gethers | 54 | Head | Laborer | South Carolina |
| 34 | Rosa Gethers | 40 | Wife | Maid | South Carolina |
| 35 | Cardew Herring | 46 | Head | Lumber Inspector | South Carolina |
| 36 | Grace Herring | 45 | Wife | — | South Carolina |
| 37 | Howard Herring | 17 | Son | Laborer | South Carolina |
| 38 | Ola Grace Herring | 11 | Daughter | — | South Carolina |
| 39 | Gary Herring | 6 | 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)