MJ
Mary Jefferson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Coahoma-County, Mississippi
Our Model Tree links this Mary Jefferson across the 1920, 1930 and 1940 US Censuses in Coahoma-County, Mississippi (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 5-person household.
Age 41
b. ~1899
Female
Spouse
Born: Mississippi
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Coahoma-County, Mississippi |
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Mississippi |
| 1935 Residence (City) | Rural |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Mississippi |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Township / Ward | Clarksdale |
| Est. Birth Year | ~1899 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Columbus Jefferson | Son | — | 9 | ~1931 |
| Mary Jefferson | Spouse | — | 41 | ~1899 |
| Henry Jefferson | Son | — | 16 | ~1924 |
| Henry Jefferson | Head | — | 46 | ~1894 |
| James Jefferson | Son | — | 14 | ~1926 |
Census Appearances
1920
Quitman, Mississippi
Spouse, age 26
Quitman, Mississippi · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Mississippi |
| Father's Birthplace | Mississippi |
| Mother's Birthplace | Mississippi |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1930
Quitman, Mississippi
Spouse, age 31
Quitman, Mississippi · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Mississippi |
| Age at First Marriage | 19 |
| Father's Birthplace | Mississippi |
| Mother's Birthplace | Mississippi |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1940
Coahoma-County, Mississippi
Spouse, age 41
Coahoma-County, Mississippi · implied b. ~1899 — 5 household members
| Surname | Jefferson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Mississippi |
| 1935 Residence (City) | Rural |
| Industry | 0 |
| Highest Grade | No 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 Jefferson 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 Jefferson
Spouse · 1940 · age 41 · b. ~1899 · Mississippi
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Coahoma-County, Mississippi
Open full size
1940 US Federal Census — Coahoma-County, Mississippi
Page Contents
26 people indexed on this census page (nara:1940:m-t0627-02017-00031)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Zelma Montgomery | 28 | Head | Laborer | Mississippi |
| 42 | Eara Montgomery | 25 | Wife | — | Mississippi |
| 43 | Douglas Montgomery | 9 | Son | — | Mississippi |
| 44 | Magalene Montgomery | 7 | Daughter | — | Mississippi |
| 45 | Estella Montgomery | 5 | Daughter | — | Mississippi |
| 46 | Delma Jr. Montgomery | 4 | Son | — | Mississippi |
| 47 | Edna Louise Montgomery | 1 | Daughter | — | Mississippi |
| 48 | Henry Jefferson | 46 | Head | Farm Worker | Mississippi |
| 49 | Mary Jefferson THIS PERSON | 41 | Wife | — | Mississippi |
| 50 | Henry Jr. Jefferson | 16 | Son | — | Mississippi |
| 51 | James Jefferson | 14 | Son | — | Mississippi |
| 52 | Columbus Jefferson | 9 | Son | — | Mississippi |
| 53 | Sam L. Holmes | 59 | Head | Carpenter | Mississippi |
| 54 | Minnie Holmes | 53 | Wife | — | Louisiana |
| 55 | Lila Dickerson | 41 | Head | Assistant Librarian | Mississippi |
| 56 | Lula Jones | 56 | Head | — | Mississippi |
| 57 | Willie Hatch | 35 | Head | Mail Carrier | Mississippi |
| 58 | Lillian Hatch | 18 | Wife | — | Mississippi |
| 59 | Winona Young | 42 | Head | — | Mississippi |
| 60 | Ervin Hester | 67 | Mother | — | Mississippi |
| 61 | Lula Banks | 78 | Lodger | — | Mississippi |
| 62 | Leonard Birdsong | 44 | Lodger | Project Director | Mississippi |
| 63 | Walter Berry | 37 | Lodger | Fireman | Mississippi |
| 64 | J. G. Wallace | 62 | Lodger | General Superintendent | Georgia |
| 65 | Archie Beard | 34 | Lodger | Laborer | Mississippi |
| 66 | Ben Garner | 19 | Lodger | 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)