HJ
Helen Johnston — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, Pennsylvania
Our Model Tree links this Helen Johnston across the 1930 and 1940 US Censuses in Mercer-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 7-person household.
Age 17
b. ~1923
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, Pennsylvania |
| Surname | Johnston |
| Given Name | Helen L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | French Creek |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | French Creek |
| Est. Birth Year | ~1923 |
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 Helen | Age | Birth yr |
|---|---|---|---|---|
| Homer Johnston | Head | — | 37 | ~1903 |
| John Johnston | Son | — | 10 | ~1930 |
| Bessie Johnston | Spouse | — | 37 | ~1903 |
| Howard Johnston | Son | — | 15 | ~1925 |
| Margaret Johnston | Daughter | — | 12 | ~1928 |
| Verna Johnston | Daughter | — | 6 | ~1934 |
| Helen Johnston | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Mercer, Pennsylvania
Other, age 7
Mercer, Pennsylvania · implied b. ~1923 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Helen L |
| Relationship to Head | Grand daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Mercer-County, Pennsylvania
Daughter, age 17
Mercer-County, Pennsylvania · implied b. ~1923 — 7 household members
| Surname | Johnston |
| Given Name | Helen L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | French Creek |
| 1935 Residence (County) | Mercer |
| Hours Worked | 0 |
| Highest Grade | H 4 |
| 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 Helen Johnston across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen Johnston
Daughter · 1940 · age 17 · b. ~1923 · Pennsylvania
★ You are viewing this record
Sibling
John Johnston
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Verna Johnston
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Johnston
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Johnston
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 — Mercer-County, Pennsylvania
Open full size
1940 US Federal Census — Mercer-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03570-00573)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John L. Crawford | 73 | Husband | Farmer | Pennsylvania |
| 42 | Mary H. Crawford | 36 | Head | Farmer | Pennsylvania |
| 43 | Wife Edith M. | None | F | — | — |
| 44 | Daughter Gladys M. | None | F | — | — |
| 45 | Son Harold R. | None | M | — | — |
| 46 | Daughter Shelby J. | None | F | — | — |
| 47 | Eva V. Bell | 72 | Mother-in-law | — | Pennsylvania |
| 48 | Thomas A. Challey | 56 | Head | Labour | Pennsylvania |
| 49 | Susan A. Challey | 38 | Wife | — | Pennsylvania |
| 50 | Thomas J. Challey | 17 | Son | Farm Hand | Pennsylvania |
| 51 | Susan Challey | 14 | Daughter | — | Pennsylvania |
| 52 | E. Lee Challey | 12 | Son | — | Pennsylvania |
| 53 | Ruth E. Challey | 9 | Daughter | — | Pennsylvania |
| 54 | Vance L. Challey | 4 | Son | — | Pennsylvania |
| 55 | Wilbert S. Greer | 46 | Head | Farmer | Pennsylvania |
| 56 | Anna M. Greer | 37 | Wife | — | Pennsylvania |
| 57 | W. Sheldon Greer | 17 | Son | Chore Boy | Pennsylvania |
| 58 | Juanita B. Greer | 16 | Daughter | — | Pennsylvania |
| 59 | Arthur A. Greer | 14 | Son | Chore Boy | Pennsylvania |
| 60 | Edward T. Greer | 12 | Son | — | Pennsylvania |
| 61 | Homer A. Johnston | 37 | Head | Farmer | Pennsylvania |
| 62 | Bessie H. Johnston | 37 | Wife | — | Pennsylvania |
| 63 | Helen L. Johnston THIS PERSON | 17 | Daughter | — | Pennsylvania |
| 64 | Howard R. Johnston | 15 | Son | — | Pennsylvania |
| 65 | Margaret G. Johnston | 12 | Daughter | — | Pennsylvania |
| 66 | John F. Johnston | 10 | Son | — | Pennsylvania |
| 67 | Verna M. Johnston | 6 | Daughter | — | Pennsylvania |
| 68 | John A. Crawford | 42 | Head | Spinner | Pennsylvania |
| 69 | Luella M. Crawford | 32 | Wife | — | Pennsylvania |
| 70 | Calvin L. Crawford | 10 | Son | — | Pennsylvania |
| 71 | James E. Crawford | 7 | Son | — | Pennsylvania |
| 72 | Llewellyn Bonham | 83 | Father-in-law | — | Pennsylvania |
| 73 | Peter Sarketus | 52 | Head | Farmer | Lithuania |
| 74 | Annie Sarketus | 48 | Wife | — | Lithuania |
| 75 | Anna Sarketus | 17 | Daughter | — | Pennsylvania |
| 76 | Left One To Many Space Sarketus | None | — | — | — |
| 77 | Stephen Johnston | 55 | Head | Farmer | Pennsylvania |
| 78 | Jennie B. Johnston | 51 | Wife | — | Pennsylvania |
| 79 | Lee J. Johnston | 54 | Head | Farmer | Pennsylvania |
| 80 | Eva M. Johnston | 54 | Wife | — | 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)