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Mary Blackwell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Covington-County, Mississippi
Our Model Tree links this Mary Blackwell across the 1930 and 1940 US Censuses in Covington-County, Mississippi (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Female
Daughter
Born: Mississippi
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Covington-County, Mississippi |
| Surname | Blackwell |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Covington |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Mississippi |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Township / Ward | Okatoma |
| Est. Birth Year | ~1928 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Georgia Blackwell | Daughter | — | 5 | ~1935 |
| Helen Blackwell | Daughter | — | 3 | ~1937 |
| Myrtle Blackwell | Spouse | — | 32 | ~1908 |
| Mary Blackwell | Daughter | — | 12 | ~1928 |
| James Blackwell | Daughter | — | 1 | ~1939 |
| Wanna Blackwell | Head | — | 39 | ~1901 |
| Robert Blackwell | Son | — | 14 | ~1926 |
| John Blackwell | Son | — | 7 | ~1933 |
| Warren Blackwell | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Covington, Mississippi
Daughter, age 2
Covington, Mississippi · implied b. ~1928 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Mississippi |
| Age at First Marriage | 2 |
| Father's Birthplace | Mississippi |
| Mother's Birthplace | Mississippi |
| Can Read/Write | No |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1940
Covington-County, Mississippi
Daughter, age 12
Covington-County, Mississippi · implied b. ~1928 — 9 household members
| Surname | Blackwell |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Covington |
| Highest Grade | 6 |
| 1935 Residence | Mississippi |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
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 Blackwell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Blackwell
Daughter · 1940 · age 12 · b. ~1928 · Mississippi
★ You are viewing this record
Sibling
Helen Blackwell
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Warren Blackwell
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Blackwell
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Blackwell
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Georgia Blackwell
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Blackwell
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 — Covington-County, Mississippi
Open full size
1940 US Federal Census — Covington-County, Mississippi
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02019-00443)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Barney Mcree | 21 | Son | Farm Laborer | Mississippi |
| 42 | Kenneth Mcree | 18 | Son | — | Mississippi |
| 43 | Wanna Blackwell | 39 | Head | Farmer | Mississippi |
| 44 | Myrtle B. Blackwell | 32 | Wife | — | Mississippi |
| 45 | Robert D. Blackwell | 14 | Son | — | Mississippi |
| 46 | Mary J. Blackwell THIS PERSON | 12 | Daughter | — | Mississippi |
| 47 | Warren D. Blackwell | 10 | Daughter | — | Mississippi |
| 48 | John F. Blackwell | 7 | Son | — | Mississippi |
| 49 | Georgia Nell Blackwell | 5 | Daughter | — | Mississippi |
| 50 | Helen Rose Blackwell | 3 | Daughter | — | Mississippi |
| 51 | James Blackwell | 1 | Daughter | — | Mississippi |
| 52 | Pat Jones | 21 | Head | Driver Truck | Mississippi |
| 53 | Rena Jones | 17 | Wife | — | Mississippi |
| 54 | Joseph M. Keys | 64 | Head | Farmer | Mississippi |
| 55 | Alice Keys | 62 | Wife | — | Mississippi |
| 56 | Walter Keys | 40 | Son | Supervisor | Mississippi |
| 57 | Lela Mae Keys | 20 | Daughter-in-law | — | Mississippi |
| 58 | Buddy Keys | 8 | Grandson | — | Mississippi |
| 59 | Carlton Keys | 18 | Nephew | — | Mississippi |
| 60 | Melvin Mauldin | 40 | Head | Farmer | Mississippi |
| 61 | Annie Lee Mauldin | 41 | Wife | — | Mississippi |
| 62 | Charles C. Mauldin | 18 | Son | — | Mississippi |
| 63 | Ladell Mauldin | 15 | Son | — | Mississippi |
| 64 | Kenneth E. Mauldin | 12 | Son | — | Mississippi |
| 65 | Melva Jean Mauldin | 7 | Daughter | — | Mississippi |
| 66 | Harry S. Mauldin | 5 | Son | — | Mississippi |
| 67 | Annette Mauldin | 2 | Daughter | — | Mississippi |
| 68 | Wilson Wheeler | 24 | Head | Farmer | Mississippi |
| 69 | Cata Vera Wheeler | 24 | Wife | Cook | Mississippi |
| 70 | Arnold Mcdaniel | 24 | Head | Farm Laborer | Mississippi |
| 71 | Alene Mcdaniel | 23 | Wife | — | Mississippi |
| 72 | J. O. Ford | 34 | Head | Farmer | Mississippi |
| 73 | Elna Ford | 33 | Wife | Farm Laborer | Mississippi |
| 74 | Doris Ford | 15 | Daughter | — | Mississippi |
| 75 | James R. Ford | 10 | Son | — | Mississippi |
| 76 | Pauline Ford | 8 | Daughter | — | Mississippi |
| 77 | W. C. Ford | 5 | Son | — | Mississippi |
| 78 | Jerry Ford | 3 | Son | — | Mississippi |
| 79 | Idell Ford | 1 | Daughter | — | Mississippi |
| 80 | Curtis Wheeler | 21 | Head | Farm Laborer | Mississippi |
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)