JI
John Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Oakland-County, Michigan
Our Model Tree links this John Irwin across the 1930 and 1940 US Censuses in Oakland-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 6-person household.
Age 16
b. ~1924
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Oakland-County, Michigan |
| Surname | Irwin |
| Given Name | John K. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Pontiac |
| 1935 Residence (County) | Oakland |
| Additional Details | |
| Occupation | Paper boy |
| Industry | Local Newspaper |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 84 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Paper Boy |
| Township / Ward | Pontiac |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| Robert Irwin | Son | — | 10 | ~1930 |
| Dorothy Irwin | Daughter | — | 4 | ~1936 |
| Richard Irwin | Son | — | 14 | ~1926 |
| John Irwin | Son | — | 16 | ~1924 |
| Dorothy Irwin | Spouse | — | 40 | ~1900 |
| John Irwin | Head | — | 45 | ~1895 |
Census Appearances
1930
Oakland, Michigan
Son, age 6
Oakland, Michigan · implied b. ~1924 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Oakland-County, Michigan
Son, age 16
Oakland-County, Michigan · implied b. ~1924 — 6 household members
| Surname | Irwin |
| Given Name | John K. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Pontiac |
| 1935 Residence (County) | Oakland |
| Occupation | Paper boy |
| Industry | Local Newspaper |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 84 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 16 · b. ~1924 · Michigan
★ You are viewing this record
Sibling
Dorothy Irwin
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Irwin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Irwin
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 — Oakland-County, Michigan
Open full size
1940 US Federal Census — Oakland-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01801-00390)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John K. Irwin | 45 | Head | Real Estate Broker | Michigan |
| 2 | Dorothy C. Irwin | 40 | Wife | — | Michigan |
| 3 | John K. Irwin THIS PERSON | 16 | Son | Paper Boy | Michigan |
| 4 | Richard M. Irwin | 14 | Son | Paper Boy | Michigan |
| 5 | Robert C. Irwin | 10 | Son | — | Michigan |
| 6 | Dorothy J. Irwin | 4 | Daughter | — | Michigan |
| 7 | William L. Spargo | 52 | Head | Proprietor & Manager | North Carolina |
| 8 | Charles E. Wilson | 52 | Lodger | — | Michigan |
| 9 | Residence Given In Outside Section Of Pontiac | None | — | — | — |
| 10 | Ray T. Lewis | 56 | Partner | Assistant Manager | Michigan |
| 11 | Eva B. Lewis | 50 | Partner | Beauty Operator | Michigan |
| 12 | Frederic L. Ward | 63 | Head | Gen. Mgr. & Treas. | Michigan |
| 13 | Marguerite W. Ward | 52 | Wife | — | Michigan |
| 14 | Robert W. Ward | 18 | Son | — | Michigan |
| 15 | Ada Hortense Ward | 16 | Daughter | — | Michigan |
| 16 | Mary A. Ward | 13 | Daughter | — | Michigan |
| 17 | Edna Mctavish | 52 | Servant | Domestic | Michigan |
| 18 | Clayton Springer | 53 | Head | Executive Secretary | Michigan |
| 19 | Dorothy H. Springer | 25 | Daughter | Buyer Retail | Michigan |
| 20 | Void - Enumerated Elsewhere | None | — | — | — |
| 21 | Arthur Sierros | 36 | Head | Proprietor | Turkey |
| 22 | Afrodite Sierros | 32 | Wife | — | Turkey |
| 23 | Alexander Sierros | 6 | Son | — | Michigan |
| 24 | Marie Sierros | 1 | Daughter | — | Michigan |
| 25 | Julia M. Knight | 60 | Head | — | Penna |
| 26 | Peter H. Knight | 71 | Husband | — | Michigan |
| 27 | Ferdinand Jones | 30 | Son-in-law | Construction Engineer | Colorado |
| 28 | Helene L. Jones | 30 | Daughter | Teacher | Michigan |
| 29 | Martha I. Horton | 42 | Head | Teacher | Michigan |
| 30 | Orville Judd | 44 | Head | Foreman - Contractor | Michigan |
| 31 | Clara B. Judd | 47 | Wife | — | Michigan |
| 32 | Void Too Many Lines Reserved | None | — | — | — |
| 33 | Elmer J. Fairbank | 49 | Head | Barber | Michigan |
| 34 | Pearl V. Fairbank | 49 | Wife | — | Michigan |
| 35 | William Simmons | 45 | Lodger | Fruit Picker | Michigan |
| 36 | William J. O'Riley | 65 | Head | Super. Cone Bldg. | Michigan |
| 37 | Bessie M. O'Riley | 59 | Wife | — | Iowa |
| 38 | Kenneth H. Healy | 37 | Head | Vocational Teacher | Wisconsin |
| 39 | Madge C. Healy | 33 | Wife | Music Teacher | Wisconsin |
| 40 | William B. Healy | 10 | Son | — | Michigan |
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)