MC
Mary Conley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Ohio
Our Model Tree links this Mary Conley across the 1930 and 1940 US Censuses in Jefferson-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 7-person household.
Age 10
b. ~1930
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Ohio |
| Surname | Conley |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Brilliant |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | New Alexandria |
| Est. Birth Year | ~1930 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lula Conley | Daughter | — | 20 | ~1920 |
| Thurman Conley | Son | — | 18 | ~1922 |
| Laura Conley | Spouse | — | 39 | ~1901 |
| John Conley | Son | — | 15 | ~1925 |
| Tony Conley | Head | — | 50 | ~1890 |
| Vilda Conley | Daughter | — | 13 | ~1927 |
| Mary Conley | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Jefferson, Ohio
Daughter, age
Jefferson, Ohio · implied b. ~1930 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conley |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Jefferson-County, Ohio
Daughter, age 10
Jefferson-County, Ohio · implied b. ~1930 — 7 household members
| Surname | Conley |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Brilliant |
| 1935 Residence (County) | Jefferson |
| Highest Grade | 4 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Conley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Conley
Daughter · 1940 · age 10 · b. ~1930 · Ohio
★ You are viewing this record
Sibling
Thurman Conley
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lula Conley
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vilda Conley
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Conley
Sibling · 1940 · age 15
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, Ohio
Open full size
1940 US Federal Census — Jefferson-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03090-00024)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Roy G. Sellers | 38 | Son in-law | Clerk | Ohio |
| 42 | Margaret Sellers | 35 | Daughter | — | Ohio |
| 43 | Roy Jr. Sellers | 14 | Grandson | — | Ohio |
| 44 | Dorothy Sellers | 12 | Granddaughter | — | Ohio |
| 45 | Dean Sellers | 9 | Grandson | — | Ohio |
| 46 | Raymond Sellers | 6 | Grandson | — | Ohio |
| 47 | Tony A. Conley | 50 | Head | Brakeman | West Virginia |
| 48 | Laura E. Conley | 39 | Wife | — | Ohio |
| 49 | Lula M. Conley | 20 | Daughter | — | Ohio |
| 50 | Thurman M. Conley | 18 | Son | — | Ohio |
| 51 | John R. Conley | 15 | Son | — | Ohio |
| 52 | Vilda M. Conley | 13 | Daughter | — | Ohio |
| 53 | Mary Ann Conley THIS PERSON | 10 | Daughter | — | Ohio |
| 54 | Harry Chambers | 37 | Head | Oil Driller | West Virginia |
| 55 | Thelma Chambers | 28 | Wife | — | Ohio |
| 56 | Ruby Chambers | 7 | Daughter | — | Ohio |
| 57 | Ronald Chambers | 2 | Son | — | West Virginia |
| 58 | Anna Mcdevitt | 54 | Mother-in-law | — | Ohio |
| 59 | Roy Currie | 55 | Head | Foreman | Ohio |
| 60 | Louanna Currie | 50 | Wife | — | Ohio |
| 61 | Robert Currie | 20 | Son | Laborer | Ohio |
| 62 | Mary Currie | 19 | Daughter-in-law | — | Ohio |
| 63 | Claude Currie | 1 | Grandson | — | Ohio |
| 64 | Bonnie Lou Currie | 12 | Daughter | — | Ohio |
| 65 | Myrtle Buell | 28 | Head | — | Ohio |
| 66 | Norma Buell | 11 | Daughter | — | Ohio |
| 67 | Necia Buell | 7 | Daughter | — | Ohio |
| 68 | William Buell | 4 | Son | — | Ohio |
| 69 | Ida Cox | 80 | Head | — | Ohio |
| 70 | Russell Snare | 25 | Head | Laborer | Pennsylvania |
| 71 | Mildred Snare | 29 | Wife | — | Ohio |
| 72 | Ronald Snare | 8 | Son | — | Ohio |
| 73 | Glenn Snare | 4 | Son | — | Ohio |
| 74 | Lawrence Fellows | 29 | Head | Laborer | Ohio |
| 75 | Blanche Fellows | 28 | Wife | — | West Virginia |
| 76 | Shirley A. Fellows | 5 | Daughter | — | Ohio |
| 77 | Lawrence Jr. Fellows | 3 | Son | — | West Virginia |
| 78 | John R. Whipps | 36 | Head | Armature Winder | Ohio |
| 79 | Clara Whipps | 30 | Wife | — | Ohio |
| 80 | Betty Whipps | 10 | Daughter | — | Ohio |
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)