MS
Mary Simmons — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Charleston-County, South Carolina
Our Model Tree links this Mary Simmons across the 1930 and 1940 US Censuses in Charleston-County, South Carolina (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 11-person household.
Age 10
b. ~1930
Female
Daughter
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Charleston-County, South Carolina |
| Surname | Simmons |
| Given Name | Mary Lee |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | John's Island |
| 1935 Residence (County) | Charleston |
| Additional Details | |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | Yes 2 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Johns Island |
| Est. Birth Year | ~1930 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Simmons | Daughter | — | 10 | ~1930 |
| Wilhelmina Simmons | Daughter | — | 14 | ~1926 |
| Louie Simmons | Daughter | — | 9 | ~1931 |
| Ethel Simmons | Daughter | — | 8 | ~1932 |
| Isabella Simmons | Daughter | — | 13 | ~1927 |
| Isabella Simmons | Head | — | 45 | ~1895 |
| Joseph Simmons | Son | — | 2 | ~1938 |
| James Simmons | Son | — | 11 | ~1929 |
| Willie Simmons | Son | — | 18 | ~1922 |
| Frank Simmons | Son | — | 21 | ~1919 |
| Isabella Simmons | Spouse | — | 41 | ~1899 |
Census Appearances
1930
Dorchester, South …
Daughter, age 1
Dorchester, South Carolina · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simmons |
| Given Name | Mary Lee |
| 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
Charleston-County, South …
Daughter, age 10
Charleston-County, South Carolina · implied b. ~1930 — 11 household members
| Surname | Simmons |
| Given Name | Mary Lee |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | John's Island |
| 1935 Residence (County) | Charleston |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | Yes 2 |
| 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 Simmons across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Simmons
Daughter · 1940 · age 10 · b. ~1930 · South Carolina
★ You are viewing this record
Sibling
Louie Simmons
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Simmons
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Simmons
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilhelmina Simmons
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Simmons
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willie Simmons
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Simmons
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabella Simmons
Sibling · 1940 · age 13
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 — 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-t0627-03796-00063)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ernestine Robertson | 2 | Daughter | — | South Carolina |
| 42 | Leon, Jr. Robertson | 0 | Grandson | — | South Carolina |
| 43 | Jacob Vastine | 49 | Head | Laborer | South Carolina |
| 44 | Evelina Vastine | 36 | Wife | Laborer | South Carolina |
| 45 | William J. Hartley | 34 | Head | Laborer (Carpenter) | South Carolina |
| 46 | Leathean Hartley | 30 | Wife | — | South Carolina |
| 47 | Janie Mae Hartley | 12 | Daughter | — | South Carolina |
| 48 | Isaac Simmons | 43 | Head | Laborer | South Carolina |
| 49 | Sarah Simmons | 14 | Daughter | — | South Carolina |
| 50 | Henry Simmons | 11 | Son | — | South Carolina |
| 51 | Samuel Simmons | 8 | Son | — | South Carolina |
| 52 | Byas, Jr. Glover | 30 | Head | Laborer | South Carolina |
| 53 | Louisa Glover | 29 | Wife | — | South Carolina |
| 54 | Emily Glover | 14 | Daughter | — | South Carolina |
| 55 | Evelina Glover | 10 | Daughter | — | South Carolina |
| 56 | Alicia Glover | 8 | Daughter | — | South Carolina |
| 57 | Joseph Glover | 7 | Son | — | South Carolina |
| 58 | Byas, Jr. Byas, Jr. | 5 | Son | — | South Carolina |
| 59 | Louisa Byas, Jr. | 2 | Daughter | — | South Carolina |
| 60 | Abraham Coaxum | 57 | Head | Woodcutter | South Carolina |
| 61 | Laura Coaxum | 54 | Wife | Farmer | South Carolina |
| 62 | Alma Coaxum | 12 | Daughter | — | South Carolina |
| 63 | Hannah Simmons | 56 | Head | Laborer | South Carolina |
| 64 | Florence Miller | 7 | Cousin | — | South Carolina |
| 65 | Isabella Simmons | 45 | Head | Road Work | South Carolina |
| 66 | Isabella Simmons | 41 | Wife | Gardener | South Carolina |
| 67 | Frank Simmons | 21 | Son | Laborer | South Carolina |
| 68 | Willie Simmons | 18 | Son | Laborer | South Carolina |
| 69 | Wilhelmina Simmons | 14 | Daughter | — | South Carolina |
| 70 | Isabella Simmons | 13 | Daughter | — | South Carolina |
| 71 | James Simmons | 11 | Son | — | South Carolina |
| 72 | Mary Lee Simmons THIS PERSON | 10 | Daughter | — | South Carolina |
| 73 | Louie Simmons | 9 | Daughter | — | South Carolina |
| 74 | Ethel Simmons | 8 | Daughter | — | South Carolina |
| 75 | Joseph Simmons | 2 | Son | — | South Carolina |
| 76 | William Sexton | 57 | Head | Fireman | South Carolina |
| 77 | David Sexton | 21 | Son | Laborer | South Carolina |
| 78 | James Stanley | 50 | Head | Farmer | South Carolina |
| 79 | Rose Stanley | 45 | Wife | Laborer | South Carolina |
| 80 | Rebecca Stanley | 19 | Daughter | Laborer | 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)