MI
Mary Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Howard-County, Indiana
Our Model Tree links this Mary Irwin across the 1930 and 1940 US Censuses in Howard-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Howard-County, Indiana |
| Surname | Irwin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Center Twp. |
| 1935 Residence (County) | Howard |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Center Twp |
| Est. Birth Year | ~1929 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| John Irwin | Son | — | 16 | ~1924 |
| Samuel Irwin | Head | — | 51 | ~1889 |
| Edna Irwin | Spouse | — | 50 | ~1890 |
| Mary Irwin | Daughter | — | 11 | ~1929 |
| Sarah Irwin | Daughter | — | 6 | ~1934 |
| Helen Irwin | Daughter | — | 28 | ~1912 |
| Albert Irwin | Son | — | 13 | ~1927 |
Census Appearances
1930
Grant, Indiana
Daughter, age
Grant, Indiana · implied b. ~1930 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | Marilyn J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Germany |
| Occupation | none |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Howard-County, Indiana
Daughter, age 11
Howard-County, Indiana · implied b. ~1929 — 7 household members
| Surname | Irwin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Center Twp. |
| 1935 Residence (County) | Howard |
| Highest Grade | H 4 |
| 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 11 · b. ~1929 · Indiana
★ You are viewing this record
Sibling
Helen Irwin
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Irwin
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Irwin
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert 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 — Howard-County, Indiana
Open full size
1940 US Federal Census — Howard-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01054-00278)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Chester Sullivan | 27 | Head | Laborer | Texas |
| 2 | Elizabeth Sullivan | 18 | Wife | — | Calif. |
| 3 | William Rioth | 56 | Head | Laborer | Indiana |
| 4 | Sadie Rioth | 54 | Wife | — | Indiana |
| 5 | Willard Butcher | 24 | Head | Laborer | Indiana |
| 6 | Bernice Butcher | 22 | Wife | — | Indiana |
| 7 | Nancy Butcher | 1 | Daughter | — | Indiana |
| 8 | Samuel J. Irwin | 51 | Head | — | Indiana |
| 9 | Edna A. Irwin | 50 | Wife | — | Nebraska |
| 10 | Helen Irwin | 28 | Daughter | — | Indiana |
| 11 | John S. Irwin | 16 | Son | — | Indiana |
| 12 | Albert Irwin | 13 | Son | — | Indiana |
| 13 | Mary E. Irwin THIS PERSON | 11 | Daughter | — | Indiana |
| 14 | Sarah J. Irwin | 6 | Daughter | — | Indiana |
| 15 | Perry Morris | 45 | Head | — | Indiana |
| 16 | Violet Morris | 36 | Wife | Clerk | Indiana |
| 17 | Arthur Morris | 16 | Son | — | Indiana |
| 18 | Wayne Morris | 13 | Son | — | Indiana |
| 19 | Eugene Morris | 9 | Son | — | Indiana |
| 20 | Kathaleen Morris | 6 | Daughter | — | Indiana |
| 21 | Phyllis Morris | 4 | Daughter | — | Indiana |
| 22 | Russell Mann | 22 | Head | Newswriter | Indiana |
| 23 | Martha Mann | 18 | Wife | — | Indiana |
| 24 | Chas. E. Rudkin | 44 | Head | Laborer | Indiana |
| 25 | Fred Rudkin | 14 | Foster Son | — | Indiana |
| 26 | Claude Mann | 44 | Head | Laborer | Indiana |
| 27 | Edith Mann | 37 | Wife | — | Indiana |
| 28 | John Mann | 19 | Son | — | Indiana |
| 29 | Noami Mann | 17 | Daughter | — | Indiana |
| 30 | Roy D. Mcguire | 27 | Head | Laborer | Indiana |
| 31 | Lucille Mcguire | 19 | Wife | — | Indiana |
| 32 | Ernest Willaby | 39 | Head | Farm Laborer | Kansas |
| 33 | Edna Willaby | 32 | Wife | Pantry Girl | Indiana |
| 34 | Clarence Sentney | 43 | Head | Laborer | Indiana |
| 35 | Inez Sentney | 34 | Wife | — | Indiana |
| 36 | Betty Lou Sentney | 14 | Daughter | — | Indiana |
| 37 | Rose Sentney | 12 | Daughter | — | Indiana |
| 38 | James Wilcher | 26 | Head | Hooker | Indiana |
| 39 | Rhoda Wilcher | 24 | Wife | — | Kentucky |
| 40 | Albert Graves | 54 | Head | Laborer | 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)