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Mary Mckay — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Leflore-County, Mississippi
Our Model Tree links this Mary Mckay across the 1930 and 1940 US Censuses in Leflore-County, Mississippi (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 6-person household.
Age 11
b. ~1929
Female
Daughter
Born: Mississippi
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Leflore-County, Mississippi |
| Surname | McKay |
| Given Name | Mary E. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Leflore |
| Additional Details | |
| Highest Grade | No 2 |
| 1935 Residence | Mississippi |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Township / Ward | Beat 1 |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Emma Mckay | Head | — | 44 | ~1896 |
| Mabel Mckay | Daughter | — | 13 | ~1927 |
| Jane Mckay | Daughter | — | 22 | ~1918 |
| Cassie Mckay | Daughter | — | 5 | ~1935 |
| Mary Mckay | Daughter | — | 11 | ~1929 |
| Alex Mckay | Son | — | 8 | ~1932 |
Census Appearances
1930
Leflore, Mississippi
Daughter, age 1
Leflore, Mississippi · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 1 |
| 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
Leflore-County, Mississippi
Daughter, age 11
Leflore-County, Mississippi · implied b. ~1929 — 6 household members
| Surname | McKay |
| Given Name | Mary E. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Leflore |
| Highest Grade | No 2 |
| 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 Mckay across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mckay
Daughter · 1940 · age 11 · b. ~1929 · Mississippi
★ You are viewing this record
Sibling
Mabel Mckay
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alex Mckay
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cassie Mckay
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Mckay
Sibling · 1940 · age 22
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 — Leflore-County, Mississippi
Open full size
1940 US Federal Census — Leflore-County, Mississippi
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02043-00156)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Adeline L. Williams | 18 | daughter | Laborer | Mississippi |
| 2 | Alexander Williams | 15 | son | Laborer | Mississippi |
| 3 | Napoleon Williams | 13 | son | — | Mississippi |
| 4 | Annie L. Williams | 12 | daughter | — | Mississippi |
| 5 | Liana B. Williams | 10 | daughter | — | Mississippi |
| 6 | Minnie O. Williams | 7 | daughter | — | Mississippi |
| 7 | Louis Jr. Williams | 6 | son | — | Mississippi |
| 8 | Mary Williams | 2 | daughter | — | Mississippi |
| 9 | Blue Martha L. Williams | 1 | grand-daughter | — | Mississippi |
| 10 | Dale Walter Williams | 1 | grand-son | — | Mississippi |
| 11 | Corbin Mcclung | 66 | Head | Farmer | Mississippi |
| 12 | Misterie Mcclung | 63 | Wife | — | Mississippi |
| 13 | Dan Mcclung | 23 | son | Laborer | Mississippi |
| 14 | William Mcclung | 19 | son | Farmer | Mississippi |
| 15 | Nellie Mcclung | 18 | daughter-in-law | — | Mississippi |
| 16 | Willie Mcclung | 10 | grand-son | — | Mississippi |
| 17 | Alex Mcclung | 21 | Head | Laborer | Mississippi |
| 18 | Mary B. Mcclung | 18 | Wife | — | Mississippi |
| 19 | Emma Mckay | 44 | Head | Farmer | Mississippi |
| 20 | Jane R. Mckay | 22 | daughter | Laborer | Mississippi |
| 21 | Mabel Mckay | 13 | daughter | — | Mississippi |
| 22 | Mary E. Mckay THIS PERSON | 11 | daughter | — | Mississippi |
| 23 | Alex Mckay | 8 | son | — | Mississippi |
| 24 | Cassie Lee Mckay | 5 | daughter | — | Mississippi |
| 25 | Edwin Williams | 21 | Head | Farmer | Mississippi |
| 26 | Lucille W. Williams | 25 | Wife | — | Mississippi |
| 27 | Frank Brown | 20 | Head | Farmer | Mississippi |
| 28 | Hallie W. Brown | 18 | Wife | — | Mississippi |
| 29 | Jesse Bell | 49 | Head | Farmer | Mississippi |
| 30 | Louise B. Bell | 38 | Wife | — | Mississippi |
| 31 | Paul Jackson | 23 | Head | Farmer | Mississippi |
| 32 | Inez Jackson | 21 | Wife | — | Mississippi |
| 33 | Paul Jr. Jackson | 2 | son | — | Mississippi |
| 34 | Tom Williams | 45 | Head | Farmer | Mississippi |
| 35 | Estelle Williams | 42 | Wife | — | Mississippi |
| 36 | Estelle Williams | 18 | daughter | Laborer | Mississippi |
| 37 | Armster Williams | 16 | son | Laborer | Mississippi |
| 38 | Corrine Williams | 11 | daughter | — | Mississippi |
| 39 | Ozzie B. Williams | 10 | son | — | Mississippi |
| 40 | Genetti Williams | 8 | daughter | — | 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)