MH
Mary Hardin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Alabama
Our Model Tree links this Mary Hardin across the 1930 and 1940 US Censuses in Jefferson-County, Alabama (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 8-person household.
Age 19
b. ~1921
Female
Daughter
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Alabama |
| Surname | Hardin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Part of Precinct 16 |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Hours Worked | 5 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Part Of Precinct 16 |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Walter Hardin | Head | — | 53 | ~1887 |
| Mavis Hardin | Daughter | — | 14 | ~1926 |
| Jimmie Hardin | Son | — | 12 | ~1928 |
| Mary Hardin | Daughter | — | 19 | ~1921 |
| Huddleston Hardin | Son | — | 17 | ~1923 |
| Hallie Hardin | Spouse | — | 51 | ~1889 |
| Josephine Hardin | Daughter | — | 21 | ~1919 |
| Maylene Hardin | Daughter | — | 23 | ~1917 |
Census Appearances
Daughter, age 9
Jefferson, Alabama · implied b. ~1921 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harding |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Jefferson-County, Alabama
Daughter, age 19
Jefferson-County, Alabama · implied b. ~1921 — 8 household members
| Surname | Hardin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Part of Precinct 16 |
| 1935 Residence (County) | Jefferson |
| Hours Worked | 5 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Hardin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hardin
Daughter · 1940 · age 19 · b. ~1921 · Alabama
★ You are viewing this record
Sibling
Maylene Hardin
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Huddleston Hardin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mavis Hardin
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Hardin
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jimmie Hardin
Sibling · 1940 · age 12
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 — Jefferson-County, Alabama
Open full size
1940 US Federal Census — Jefferson-County, Alabama
Page Contents
27 people indexed on this census page (nara:1940:m-t0627-00044-00256)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lucile Reid | 26 | Wife | — | Alabama |
| 42 | Annie Reid | 68 | Head | — | Alabama |
| 43 | Dorothy Reid | 26 | Daughter | — | Alabama |
| 44 | John Hoyle | 55 | Head | File Clerk | England |
| 45 | Alpha Hoyle | 48 | Wife | — | Alabama |
| 46 | Virginia Hoyle | 16 | Daughter | — | Alabama |
| 47 | Henry Crane | 40 | Head | Buyer | Alabama |
| 48 | Florence Crane | 26 | Wife | — | Alabama |
| 49 | Joann Crane | 7 | Daughter | — | Alabama |
| 50 | Patsy Crane | 3 | Daughter | — | Alabama |
| 51 | Barbara Crane | 2 | Daughter | — | Alabama |
| 52 | William Mckinney | 49 | Head | Forman | Alabama |
| 53 | Annie Mckinney | 47 | Wife | — | Kentucky |
| 54 | Claude Mckinney | 21 | Son | Laborer | Alabama |
| 55 | Lola Mckinney | 14 | Daughter | — | Alabama |
| 56 | James Mckinney | 12 | Son | — | Alabama |
| 57 | John Mckinney | 9 | Son | — | Alabama |
| 58 | Verdie Donahoo | 17 | Daughter | — | Alabama |
| 59 | Fay Donahoo | 1 | Daughter | — | Alabama |
| 60 | Walter Hardin | 53 | Head | Wayman | Alabama |
| 61 | Hallie B. Hardin | 51 | Wife | — | Alabama |
| 62 | Maylene Hardin | 23 | Daughter | File Clerk | Alabama |
| 63 | Josephine Hardin | 21 | Daughter | — | Alabama |
| 64 | Mary Hardin THIS PERSON | 19 | Daughter | — | Alabama |
| 65 | Huddleston Hardin | 17 | Son | — | Illinois |
| 66 | Mavis Hardin | 14 | Daughter | — | Alabama |
| 67 | Jimmie Hardin | 12 | Son | — | Alabama |
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)