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Mary Laughlin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boone-County, Kentucky
Our Model Tree links this Mary Laughlin across the 1930 and 1940 US Censuses in Boone-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 8-person household.
Age 20
b. ~1920
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Kentucky |
| Surname | Laughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Occupation | Housekeeper |
| Industry | Private |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 80 |
| Highest Grade | No 6 |
| 1935 Residence | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Housekeeper |
| Township / Ward | Petersburg |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| William Laughlin | Son | — | 18 | ~1922 |
| George Laughlin | Son | — | 17 | ~1923 |
| Grace Laughlin | Daughter | — | 14 | ~1926 |
| Mattie Laughlin | Daughter | — | 6 | ~1934 |
| Mary Laughlin | Daughter | — | 20 | ~1920 |
| Ira Laughlin | Head | — | 46 | ~1894 |
| Thelma Laughlin | Daughter | — | 21 | ~1919 |
| Johnnie Laughlin | Son | — | 11 | ~1929 |
Census Appearances
1930
Jefferson, Kentucky
Daughter, age 9
Jefferson, Kentucky · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Laughlin |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Boone-County, Kentucky
Daughter, age 20
Boone-County, Kentucky · implied b. ~1920 — 8 household members
| Surname | Laughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Boone |
| Occupation | Housekeeper |
| Industry | Private |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 80 |
| Highest Grade | No 6 |
| 1935 Residence | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Laughlin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Laughlin
Daughter · 1940 · age 20 · b. ~1920 · Kentucky
★ You are viewing this record
Sibling
Thelma Laughlin
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Johnnie Laughlin
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Laughlin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Laughlin
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mattie Laughlin
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Laughlin
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 — Boone-County, Kentucky
Open full size
1940 US Federal Census — Boone-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01281-00013)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Effie Ryle | 55 | Head | — | Kentucky |
| 42 | Wayne Ryle | 59 | Son | Laborer | Kentucky |
| 43 | Norma Ryle | 10 | Daughter | — | Kentucky |
| 44 | Edgar Tafflin | 26 | Head | Laborer | Kentucky |
| 45 | Catherine Tafflin | 23 | Wife | — | Kentucky |
| 46 | Patricia Tafflin | 4 | Daughter | — | Kentucky |
| 47 | Billy Tafflin | 1 | Son | — | Kentucky |
| 48 | S. B. Shinkle | 71 | Head | — | Kentucky |
| 49 | Carrie Shinkle | 73 | Wife | — | Indiana |
| 50 | Ow Scott | 68 | Head | Laborer | Kentucky |
| 51 | W. H. Galloway | 46 | Head | Carpenter | Virginia |
| 52 | Alice Galloway | 48 | Wife | Waitress | Kentucky |
| 53 | David Litzfill | 36 | Head | Groceryman | Kentucky |
| 54 | Ruth Litzfill | 30 | Wife | — | Kentucky |
| 55 | William Litzfill | 13 | Son | — | Kentucky |
| 56 | Frank Litzfill | 12 | Son | — | Kentucky |
| 57 | Ira Laughlin | 46 | Head | — | Kentucky |
| 58 | Thelma Laughlin | 21 | Daughter | — | Kentucky |
| 59 | Mary Laughlin THIS PERSON | 20 | Daughter | Housekeeper | Kentucky |
| 60 | William Laughlin | 18 | Son | Laborer | Kentucky |
| 61 | George Laughlin | 17 | Son | Laborer | Kentucky |
| 62 | Grace Laughlin | 14 | Daughter | — | Kentucky |
| 63 | Johnnie Laughlin | 11 | Son | — | Kentucky |
| 64 | Mattie Laughlin | 6 | Daughter | — | Kentucky |
| 65 | Cecil Young | 28 | Head | Laborer | Kentucky |
| 66 | Ina Mae Young | 22 | Wife | — | Kentucky |
| 67 | Milton Mcwethy | 39 | Head | — | Kentucky |
| 68 | Sophia Mcwethy | 46 | Wife | — | Kentucky |
| 69 | Henry Mcwethy | 18 | Son | Laborer | Kentucky |
| 70 | Robert Mcwethy | 15 | Son | — | Kentucky |
| 71 | Helen Mcwethy | 13 | Daughter | — | Kentucky |
| 72 | Alfred Mcwethy | 11 | Son | — | Kentucky |
| 73 | Alice Mcwethy | 9 | Daughter | — | Kentucky |
| 74 | Charles Mcwethy | 7 | Son | — | Kentucky |
| 75 | Teresa Mcwethy | 79 | Mother | — | Kentucky |
| 76 | J. W. House | 80 | Head | — | Kentucky |
| 77 | William Layton | 55 | Head | Laborer | Ohio |
| 78 | Sina Layton | 50 | Wife | — | Indiana |
| 79 | Cecil Layton | 20 | Son | — | Ohio |
| 80 | Jacqueline Layton | 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)