MM
Mary Mcelroy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sumter-County, Alabama
Our Model Tree links this Mary Mcelroy across the 1920, 1930 and 1940 US Censuses in Sumter-County, Alabama (XGBoost, ~Confirmed) — first a spouse (b.~1878), then head of a 4-person household.
Age 62
b. ~1878
Female
Spouse
Born: Alabama
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sumter-County, Alabama |
| Surname | McElroy |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Alabama |
| 1935 Residence (County) | Sumter |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Precinct 18 |
| Est. Birth Year | ~1878 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcelroy | Spouse | — | 62 | ~1878 |
| Will Mcelroy | Head | — | 62 | ~1878 |
| Mary Mcelroy | Daughter | — | 23 | ~1917 |
| Blanche Mcelroy | Daughter | — | 20 | ~1920 |
Census Appearances
1920
Sumter, Alabama
Spouse, age 42
Sumter, Alabama · implied b. ~1878 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McElroy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1930
Sumter, Alabama
Spouse, age 52
Sumter, Alabama · implied b. ~1878 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McElroy |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Alabama |
| Age at First Marriage | 23 |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Can Read/Write | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Sumter-County, Alabama
Spouse, age 62
Sumter-County, Alabama · implied b. ~1878 — 4 household members
| Surname | McElroy |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Alabama |
| 1935 Residence (County) | Sumter |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Mcelroy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcelroy
Spouse · 1940 · age 62 · b. ~1878 · Alabama
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sumter-County, Alabama
Open full size
1940 US Federal Census — Sumter-County, Alabama
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00080-00710)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie B. Ray | 2 | Daughter | — | Alabama |
| 42 | James M. Killings | 68 | Head | 48 | Alabama |
| 43 | Morris E. Killings | 60 | Wife | — | Alabama |
| 44 | James H. Killings | 20 | Son | 40 | Mississippi |
| 45 | Suttles James M. Killings | 10 | Grandson | — | Alabama |
| 46 | Will Loatman | 39 | Head | 60 | Alabama |
| 47 | Sallie Loatman | 42 | Wife | — | Alabama |
| 48 | Fred May | 22 | Lodger | 40 | Alabama |
| 49 | Will H. Mcelroy | 62 | Head | 22 | Alabama |
| 50 | Mary L. Mcelroy THIS PERSON | 62 | Wife | — | Alabama |
| 51 | Mary A. Mcelroy | 23 | Daughter | — | Alabama |
| 52 | Blanche E. Mcelroy | 20 | Daughter | — | Alabama |
| 53 | Howard J. Mcelroy | 70 | Head | — | Alabama |
| 54 | William J. Welch | 28 | Head | 40 | Alabama |
| 55 | Ida B. Welch | 23 | Wife | — | Alabama |
| 56 | James Brody | 21 | Head | 40 | Alabama |
| 57 | Bell Brody | 18 | Wife | — | Alabama |
| 58 | Clyde L. Shaw | 32 | Head | 66 | Alabama |
| 59 | Eliana Shaw | 25 | Wife | — | Mississippi |
| 60 | Francis C. Shaw | 3 | Daughter | — | Alabama |
| 61 | Ernest L. Shaw | 1 | Son | — | Alabama |
| 62 | William T. Catlett | 21 | Brother | 60 | Alabama |
| 63 | Louis H. Catlett | 20 | Brother | 2 | Mississippi |
| 64 | Linsey Shumate | 53 | Head | 60 | Mississippi |
| 65 | Lou Ella Shumate | 37 | Wife | — | Mississippi |
| 66 | Salena Shumate | 9 | Daughter | — | Alabama |
| 67 | Bethania Shumate | 7 | Daughter | — | Alabama |
| 68 | Cluddie A. Shumate | 5 | Daughter | — | Alabama |
| 69 | Allie Shumate | 1 | Daughter | — | Alabama |
| 70 | Ollie Curry | 65 | Mother | — | Alabama |
| 71 | William J. Sims | 40 | Head | 60 | Mississippi |
| 72 | Lura Sims | 48 | Wife | — | Mississippi |
| 73 | Vinner Sims | 18 | Lodger | 60 | Alabama |
| 74 | William Bennie Sims | 16 | Son | 40 | Alabama |
| 75 | Fannie S. Sims | 13 | Daughter | — | Alabama |
| 76 | Mary M. Sims | 10 | Daughter | — | Alabama |
| 77 | Sam Wright | 36 | Head | 60 | Mississippi |
| 78 | Endia Wright | 40 | Wife | 8 | Mississippi |
| 79 | Angie L. Wright | 16 | Daughter | 15 | Mississippi |
| 80 | Hattie L. Wright | 13 | Daughter | 3 | Mississippi |
Related Census Records
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)