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Mary Baldwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this Mary Baldwin across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 11-person household.
Age 10
b. ~1930
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Baldwin |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Gary city |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Gary City |
| Est. Birth Year | ~1930 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dolores Baldwin | Daughter | — | 14 | ~1926 |
| Mary Baldwin | Daughter | — | 10 | ~1930 |
| Catherine Baldwin | Daughter | — | 2 | ~1938 |
| Dorothy Baldwin | Daughter | — | 17 | ~1923 |
| Governor Baldwin | Head | — | 40 | ~1900 |
| William Baldwin | Son | — | 5 | ~1935 |
| James Baldwin | Son | — | 6 | ~1934 |
| Lonnie Baldwin | Son | — | 1 | ~1939 |
| Governor Baldwin | Son | — | 3 | ~1937 |
| Thomas Baldwin | Son | — | 8 | ~1932 |
| Nettie Baldwin | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Lake, Indiana
Daughter, age
Lake, Indiana · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baldwin |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Alabama |
| Mother's Birthplace | W-Virginia |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lake-County, Indiana
Daughter, age 10
Lake-County, Indiana · implied b. ~1930 — 11 household members
| Surname | Baldwin |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Gary city |
| 1935 Residence (County) | Lake |
| Highest Grade | 5 |
| 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 Baldwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Baldwin
Daughter · 1940 · age 10 · b. ~1930 · Indiana
★ You are viewing this record
Sibling
Thomas Baldwin
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Baldwin
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Baldwin
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Baldwin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Governor Baldwin
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Baldwin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lonnie Baldwin
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Baldwin
Sibling · 1940 · age 17
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 — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01121-00210)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Wirostko | 23 | son | Laborer | Indiana |
| 42 | Helen Wirostko | 21 | daughter | Seamstress | Indiana |
| 43 | Nick Wirostko | 19 | son | Salesman | Indiana |
| 44 | Margit Wirostko | 15 | daughter | — | Indiana |
| 45 | Irene Wirostko | 8 | daughter | — | Indiana |
| 46 | John Cochron | 68 | Head | Janitor | Czechoslovakia |
| 47 | Elizabeth Cochron | 63 | wife | — | Czechoslovakia |
| 48 | Mary Cochron | 19 | daughter | — | Indiana |
| 49 | Governor Baldwin | 40 | Head | Laborer | Alabama |
| 50 | Nettie Baldwin | 34 | wife | — | Virginia |
| 51 | Dolores Baldwin | 14 | daughter | — | Indiana |
| 52 | Dorothy Baldwin | 17 | daughter | — | Indiana |
| 53 | Mary Baldwin THIS PERSON | 10 | daughter | — | Indiana |
| 54 | Thomas Baldwin | 8 | son | — | Indiana |
| 55 | James Baldwin | 6 | son | — | Indiana |
| 56 | William Baldwin | 5 | son | — | Indiana |
| 57 | Governor Jr Baldwin | 3 | son | — | Indiana |
| 58 | Catherine Baldwin | 2 | daughter | — | Indiana |
| 59 | Lonnie Baldwin | 1 | son | — | Indiana |
| 60 | Nobel Archie | 45 | Head | Laborer | Mississippi |
| 61 | Nettie Archie | 35 | wife | — | Mississippi |
| 62 | Marcus Archie | 18 | son | — | Indiana |
| 63 | Willie Archie | 14 | son | — | Indiana |
| 64 | Helen Archie | 11 | daughter | — | Indiana |
| 65 | Lillie M. Archie | 9 | daughter | — | Indiana |
| 66 | John Archie | 7 | son | — | Indiana |
| 67 | Noddie Archie | 6 | son | — | Indiana |
| 68 | Galvin Beckwith | 45 | Head | Clergyman | Louisiana |
| 69 | Elizabeth Beckwith | 46 | wife | — | Louisiana |
| 70 | Irene Beckwith | 23 | daughter | Nurse | Louisiana |
| 71 | Buckner Beckwith | 20 | son | — | Louisiana |
| 72 | Cora Beckwith | 17 | daughter | — | Louisiana |
| 73 | James Beckwith | 15 | son | — | Louisiana |
| 74 | Valentine Beckwith | 14 | daughter | — | Louisiana |
| 75 | Cecil Beckwith | 12 | daughter | — | Indiana |
| 76 | Harold Beckwith | 10 | son | — | Indiana |
| 77 | Thomas Crump | 21 | Lodger | Musician | Alabama |
| 78 | Elizabeth Crump | 18 | daughter | — | Louisiana |
| 79 | Lathow Nichol | 41 | Head | Laborer | Kentucky |
| 80 | Ealy Nichol | 37 | wife | — | Kentucky |
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)