JI
John Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Armstrong-County, Pennsylvania
Our Model Tree links this John Irwin across the 1930 and 1940 US Censuses in Armstrong-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 6-person household.
Age 14
b. ~1926
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Armstrong-County, Pennsylvania |
| Surname | Irwin |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Armstrong |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Perry Township |
| Est. Birth Year | ~1926 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Irwin | Son | — | 14 | ~1926 |
| Ruth Irwin | Spouse | — | 41 | ~1899 |
| Laird Irwin | Son | — | 10 | ~1930 |
| Anna Irwin | Daughter | — | 17 | ~1923 |
| Betty Irwin | Daughter | — | 16 | ~1924 |
| David Irwin | Head | — | 40 | ~1900 |
Census Appearances
1930
Butler, Pennsylvania
Son, age 4
Butler, Pennsylvania · implied b. ~1926 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Armstrong-County, Pennsylvania
Son, age 14
Armstrong-County, Pennsylvania · implied b. ~1926 — 6 household members
| Surname | Irwin |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Armstrong |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| 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 John Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Irwin
Son · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
Betty Irwin
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Irwin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laird Irwin
Sibling · 1940 · age 10
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 — Armstrong-County, Pennsylvania
Open full size
1940 US Federal Census — Armstrong-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03424-00337)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | David C. Irwin | 19 | Nephew | Miner | Pennsylvania |
| 42 | Dorothy M. Irwin | 17 | Niece | — | Pennsylvania |
| 43 | Clifford J. Shakley | 55 | Head | Farmer | Pennsylvania |
| 44 | Laura J. Shakley | 57 | Wife | — | Pennsylvania |
| 45 | Esther S. Shakley | 18 | Daughter | — | Pennsylvania |
| 46 | John C. Shakley | 16 | Son | — | Pennsylvania |
| 47 | David C. Irwin | 40 | Head | Miner | Pennsylvania |
| 48 | Ruth Irwin | 41 | Wife | — | Pennsylvania |
| 49 | Anna R. Irwin | 17 | Daughter | — | Pennsylvania |
| 50 | Betty E. Irwin | 16 | Daughter | — | Pennsylvania |
| 51 | John R. Irwin THIS PERSON | 14 | Son | — | Pennsylvania |
| 52 | Laird R. Irwin | 10 | Son | — | Pennsylvania |
| 53 | Meade M. Johns | 44 | Head | Farmer | Pennsylvania |
| 54 | Pearl L. Johns | 42 | Wife | — | Pennsylvania |
| 55 | Merle V. Johns | 19 | Son | — | Pennsylvania |
| 56 | Willis D. Johns | 17 | Son | — | Pennsylvania |
| 57 | Margaret E. Shakley | 72 | Head | — | Pennsylvania |
| 58 | John M. Lofton | 65 | Head | Farmer | Pennsylvania |
| 59 | Sara J. Lofton | 63 | Wife | — | Pennsylvania |
| 60 | John E. Lofton | 39 | Son | Farmer | Pennsylvania |
| 61 | Priscilla A.B. Lofton | 32 | Daughter-in-law | — | Pennsylvania |
| 62 | Lois M. Lofton | 13 | Granddaughter | — | Pennsylvania |
| 63 | Merle E. Lofton | 7 | Grandson | — | Pennsylvania |
| 64 | Marlene A. Lofton | 5 | Granddaughter | — | Pennsylvania |
| 65 | William A. Moore | 68 | Head | Farmer | Pennsylvania |
| 66 | Esther S. Moore | 18 | Daughter | — | Pennsylvania |
| 67 | Kenneth P. Moore | 12 | Son | — | Pennsylvania |
| 68 | Wesley L. Levier | 43 | Head | School Bus Driver | Pennsylvania |
| 69 | Ruby S. Levier | 40 | Wife | — | Pennsylvania |
| 70 | Edith M. Levier | 19 | Daughter | Housekeeper | Pennsylvania |
| 71 | Sarah J. Levier | 17 | Daughter | Housekeeper | Pennsylvania |
| 72 | William C. Levier | 14 | Son | Farm Laborer | Pennsylvania |
| 73 | Leroy M. Levier | 11 | Son | — | Pennsylvania |
| 74 | Florence M. Levier | 8 | Daughter | — | Pennsylvania |
| 75 | Milton E. Levier | 6 | Son | — | Pennsylvania |
| 76 | Mabel S. Levier | 4 | Daughter | — | Pennsylvania |
| 77 | Marjory J. Levier | 2 | Daughter | — | Pennsylvania |
| 78 | William S. Levier | 75 | Head | Farmer | Pennsylvania |
| 79 | Herman S. Mcallister | 55 | Head | Farmer | Pennsylvania |
| 80 | William A. Mcallister | 68 | Brother | Farm Laborer | 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)