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Mary Buchanan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Monroe-County, Mississippi
Our Model Tree links this Mary Buchanan across the 1930 and 1940 US Censuses in Monroe-County, Mississippi (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 11-person household.
Age 19
b. ~1921
Female
Daughter
Born: Mississippi
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Monroe-County, Mississippi |
| Surname | Buchanan |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Beat 4 |
| 1935 Residence (County) | Monroe |
| Additional Details | |
| Occupation | Helper |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 24 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Occupation | Helper |
| Township / Ward | Beat 4 |
| Est. Birth Year | ~1921 |
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 |
|---|---|---|---|---|
| Ola Buchanan | Spouse | — | 42 | ~1898 |
| Mary Buchanan | Daughter | — | 19 | ~1921 |
| Edward Buchanan | Son | — | 21 | ~1919 |
| Sifent Buchanan | Son | — | 14 | ~1926 |
| Thomas Buchanan | Son | — | 10 | ~1930 |
| Rubert Buchanan | Son | — | 12 | ~1928 |
| Acta Buchanan | Other | — | 38 | ~1902 |
| Helen Buchanan | Daughter | — | 6 | ~1934 |
| Nova Buchanan | Daughter | — | 2 | ~1938 |
| Herbert Buchanan | Son | — | 16 | ~1924 |
| Raymond Buchanan | Head | — | 45 | ~1895 |
Census Appearances
1930
Monroe, Mississippi
Daughter, age 8
Monroe, Mississippi · implied b. ~1922 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Buchanan |
| Given Name | Maggie D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Mississippi |
| Father's Birthplace | Mississippi |
| Mother's Birthplace | Mississippi |
| Can Read/Write | No |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1940
Monroe-County, Mississippi
Daughter, age 19
Monroe-County, Mississippi · implied b. ~1921 — 11 household members
| Surname | Buchanan |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Beat 4 |
| 1935 Residence (County) | Monroe |
| Occupation | Helper |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 24 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Buchanan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Buchanan
Daughter · 1940 · age 19 · b. ~1921 · Mississippi
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Sibling
Helen Buchanan
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nova Buchanan
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Buchanan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herbert Buchanan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rubert Buchanan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Buchanan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sifent Buchanan
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 — Monroe-County, Mississippi
Open full size
1940 US Federal Census — Monroe-County, Mississippi
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02050-00729)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Oscar Lucas | 62 | Head | Farmer | Mississippi |
| 42 | Julia Edwards | 49 | Lodger | Helper | Mississippi |
| 43 | Mary Lee Edwards | 16 | Daughter | Helper | Mississippi |
| 44 | Asalee Edwards | 12 | Daughter | Helper | Mississippi |
| 45 | John Wesley James | 67 | Head | Farmer | Mississippi |
| 46 | Mary Jane James | 67 | Wife | Helper | Mississippi |
| 47 | Rozetta Lucas | 69 | Head | Farmer | Mississippi |
| 48 | Ize Hopper | 85 | Lodger | — | Mississippi |
| 49 | Arthur James | 51 | Head | Farmer | Mississippi |
| 50 | Maddie James | 52 | Wife | Helper | Mississippi |
| 51 | Nyoma Rowe | 14 | Granddaughter | Helper | Mississippi |
| 52 | Josephine Rowe | 12 | Granddaughter | — | Mississippi |
| 53 | Maddie A. Rowe | 10 | Granddaughter | — | Mississippi |
| 54 | Anna R. Rowe | 8 | Granddaughter | — | Mississippi |
| 55 | Tom Hood | 42 | Head | Farmer | Mississippi |
| 56 | Alma V. Hood | 34 | Wife | Helper | Mississippi |
| 57 | Allie B. Porter | 11 | Daughter | — | Mississippi |
| 58 | Mildred Mae Porter | 9 | Daughter | — | Mississippi |
| 59 | Claude S. Porter | 19 | Head | Farmer | Mississippi |
| 60 | Harrison Mcnary | 38 | Head | Farmer | Mississippi |
| 61 | Lannie Mcnary | 32 | Wife | Helper | Mississippi |
| 62 | Harry Mcnary | 5 | Son | — | Mississippi |
| 63 | Lorenza Gales | 30 | Head | Cook | Mississippi |
| 64 | Rena Gales | 13 | Daughter | — | Mississippi |
| 65 | William Gathings | 33 | Lodger | Day Laborer | Mississippi |
| 66 | Raymond Buchanan | 45 | Head | Farmer | Mississippi |
| 67 | Ola Buchanan | 42 | Wife | — | Mississippi |
| 68 | Edward Buchanan | 21 | Son | Helper | Mississippi |
| 69 | Mary Lou Buchanan THIS PERSON | 19 | Daughter | Helper | Mississippi |
| 70 | Herbert Buchanan | 16 | Son | Helper | Mississippi |
| 71 | Sifent Buchanan | 14 | Son | Helper | Mississippi |
| 72 | Rubert Buchanan | 12 | Son | — | Mississippi |
| 73 | Thomas Earl Buchanan | 10 | Son | — | Mississippi |
| 74 | Helen Buchanan | 6 | Daughter | — | Mississippi |
| 75 | Nova Ruth Buchanan | 2 | Daughter | — | Mississippi |
| 76 | Acta Buchanan | 38 | Brother | Farmer | Mississippi |
| 77 | Irvin Clark | 54 | Head | Farmer | Mississippi |
| 78 | Whitman Buchanan | 23 | Head | Farmer | Mississippi |
| 79 | Mary S. Buchanan | 22 | Wife | — | Mississippi |
| 80 | Elizabeth Garth | 27 | Head | Farmer | 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)