MJ
Mary Johnston — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clearfield-County, Pennsylvania
Our Model Tree links this Mary Johnston across the 1920, 1930 and 1940 US Censuses in Clearfield-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1875), then head of a 2-person household.
Age 65
b. ~1875
Female
Head
Born: Pennsylvania
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Clearfield-County, Pennsylvania |
| Surname | Johnston |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Greenwood Township |
| 1935 Residence (County) | Clearfield |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Greenwood Township |
| Est. Birth Year | ~1875 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Johnston | Head | — | 65 | ~1875 |
| Samuel Johnston | Son | — | 35 | ~1905 |
Census Appearances
1920
Clearfield, Pennsylvania
Spouse, age 44
Clearfield, Pennsylvania · implied b. ~1876 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Clearfield, Pennsylvania
Spouse, age 55
Clearfield, Pennsylvania · implied b. ~1875 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Mary E. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 18 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Clearfield-County, Pennsylvania
Head, age 65
Clearfield-County, Pennsylvania · implied b. ~1875 — 2 household members
| Surname | Johnston |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Greenwood Township |
| 1935 Residence (County) | Clearfield |
| Class of Worker | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Johnston
Head · 1940 · age 65 · b. ~1875 · Pennsylvania
★ 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 — Clearfield-County, Pennsylvania
Open full size
1940 US Federal Census — Clearfield-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03470-00841)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ethel Laura Tempel | 83 | Housekeeper | Housekeeper | Pennsylvania |
| 2 | Rose Elizabeth Anderson | 42 | Daughter | — | Pennsylvania |
| 3 | William H. Johnston | 33 | Head | Truck Driver | Pennsylvania |
| 4 | Margaret P. Johnston | 33 | Wife | — | Pennsylvania |
| 5 | Merrill William Johnston | 14 | Son | — | Pennsylvania |
| 6 | Norma F. Johnston | 10 | Daughter | — | Pennsylvania |
| 7 | Carl Rupert Johnston | 8 | Son | — | Pennsylvania |
| 8 | Jack Roy Johnston | 6 | Son | — | Pennsylvania |
| 9 | Allen J. Johnston | 56 | Head | Laborer | Pennsylvania |
| 10 | Mabel L. Johnston | 50 | Wife | — | Pennsylvania |
| 11 | Kenneth William Johnston | 27 | Son | Miner | Pennsylvania |
| 12 | Harry G. Bell | 73 | Head | — | Pennsylvania |
| 13 | Margaret B. Bell | 66 | Wife | — | Pennsylvania |
| 14 | Vaughn Bell | 47 | Son | Carpenter Helper | Pennsylvania |
| 15 | Wilshire W. Bell | 26 | Son | Truck Driver | Pennsylvania |
| 16 | Harry B. Johnston | 79 | Head | — | Pennsylvania |
| 17 | Ethyl C. Johnston | 35 | Daughter | School Teacher | Pennsylvania |
| 18 | Dayton W. Lines | 35 | Head | Weigh Master | Pennsylvania |
| 19 | Stella M. Lines | 36 | Wife | — | Pennsylvania |
| 20 | Betty Jane Lines | 16 | Daughter | — | Pennsylvania |
| 21 | Lois Belle Lines | 14 | Daughter | — | Pennsylvania |
| 22 | Donald Paul Lines | 10 | Son | — | Pennsylvania |
| 23 | Charles George Lines | 2 | Son | — | Pennsylvania |
| 24 | Mary E. Johnston THIS PERSON | 65 | Head | — | Pennsylvania |
| 25 | Samuel D. Johnston | 35 | Son | Laborer | Pennsylvania |
| 26 | Wellington Curry | 20 | Head | Laborer | Pennsylvania |
| 27 | Viola J. Curry | 19 | Wife | — | Pennsylvania |
| 28 | Rex H. Herrick | 24 | Head | Laborer | Pennsylvania |
| 29 | Esther Herrick | 24 | Wife | — | Pennsylvania |
| 30 | Harlene Joyce Herrick | 3 | Daughter | — | Pennsylvania |
| 31 | Delores Jean Herrick | 0 | Daughter | — | Pennsylvania |
| 32 | Peldora Bell Herrick | 72 | Mother | — | Pennsylvania |
| 33 | J. M. Lines | 77 | Head | — | Pennsylvania |
| 34 | Lewis B. Lines | 65 | Head | Miner | Pennsylvania |
| 35 | Lois F. Lines | 67 | Wife | — | Pennsylvania |
| 36 | Alonzo W. Lines | 40 | Son | Laborer | Pennsylvania |
| 37 | John B. Newcomer | 65 | Head | — | Pennsylvania |
| 38 | Blough Margaret Newcomer | 30 | Housekeeper | Housekeeper | Pennsylvania |
| 39 | Anthony Moses | 77 | Head | — | Pennsylvania |
| 40 | Lorinda Martin | 46 | Head | — | Pennsylvania |
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)