MI
Mary Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Mary Irwin across the 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 4-person household.
Age 12
b. ~1928
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Irwin |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Edgewood |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Edgewood |
| Est. Birth Year | ~1928 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Hazel Irwin | Spouse | — | 37 | ~1903 |
| Kenneth Irwin | Head | — | 39 | ~1901 |
| Mary Irwin | Daughter | — | 12 | ~1928 |
| James Irwin | Son | — | 13 | ~1927 |
Census Appearances
1930
Marion, Indiana
Daughter, age 2
Marion, Indiana · implied b. ~1928 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | Mary Louise |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Daughter, age 12
Marion-County, Indiana · implied b. ~1928 — 4 household members
| Surname | Irwin |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Edgewood |
| 1935 Residence (County) | Marion |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Irwin
Daughter · 1940 · age 12 · b. ~1928 · Indiana
★ You are viewing this record
Sibling
James Irwin
Sibling · 1940 · age 13
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01075-00747)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edna Kelly | 31 | Wife | — | Indiana |
| 42 | Marjorie Kelly | 10 | Daughter | — | Indiana |
| 43 | Marie Kelly | 5 | Daughter | — | Indiana |
| 44 | Murray Rosenburger | 60 | Head | Brickmason | Indiana |
| 45 | Meta Rosenburger | 46 | Wife | Clerk | Indiana |
| 46 | Gerhard Hasz | 39 | Head | Salesman | Wisconsin |
| 47 | Vera Hasz | 27 | Wife | — | Indiana |
| 48 | Ann E Hasz | 2 | Daughter | — | Indiana |
| 49 | Karen G Hasz | 0 | Son | — | Indiana |
| 50 | Osmar Christopher | 24 | Lodger | Laborer | Indiana |
| 51 | Leon Roquet | 43 | Head | Assistant Foreman | Indiana |
| 52 | Hazel Roquet | 40 | Wife | — | Indiana |
| 53 | Leon Roquet | 18 | Son | — | Indiana |
| 54 | George Roquet | 14 | Son | — | Indiana |
| 55 | Betty Roquet | 12 | Daughter | — | Indiana |
| 56 | James D Mccallie | 41 | Head | Plumber | Indiana |
| 57 | Bertha M Mccallie | 35 | Wife | Evangelist | Indiana |
| 58 | James D Jr Mccallie | 11 | Son | — | Indiana |
| 59 | Norma J Mccallie | 9 | Daughter | — | Indiana |
| 60 | Harvey Mccallie | 63 | Father | Plumber | Indiana |
| 61 | Maude M Mccallie | 64 | Mother | — | Indiana |
| 62 | James E Keaton | 48 | Head | Machinist | Indiana |
| 63 | M Grace Keaton | 45 | Wife | — | Indiana |
| 64 | Mary M Langley | 22 | Daughter | Clerk | Indiana |
| 65 | Lewis L Langley | 24 | Son-in-law | Produce Man | Indiana |
| 66 | Walter H Wilson | 46 | Head | Truckdriver | Indiana |
| 67 | Bertha Wilson | 44 | Wife | — | Indiana |
| 68 | Charles E Wilson | 17 | Son | — | Indiana |
| 69 | Fredrick J Kelso | 5 | Nephew | — | Indiana |
| 70 | Isabelle Hineline | 76 | Mother-in-law | — | Kentucky |
| 71 | Effie Hamilton | 56 | Head | — | Indiana |
| 72 | Walter Hamilton | 36 | Son | Laborer | Indiana |
| 73 | Edward Winslow | 71 | Brother | — | Indiana |
| 74 | Marion H Martin | 66 | Head | Laborer | Indiana |
| 75 | Cora L Martin | 64 | Wife | — | Indiana |
| 76 | Kenneth S Irwin | 39 | Head | Credit Manager | Indiana |
| 77 | Hazel M Irwin | 37 | Wife | — | Indiana |
| 78 | James B Irwin | 13 | Son | — | Indiana |
| 79 | Mary L Irwin THIS PERSON | 12 | Daughter | — | Indiana |
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)