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Mary Bartlett — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this Mary Bartlett across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Bartlett |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Whiting City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Whiting City |
| Est. Birth Year | ~1925 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lorinda Merkle | Spouse | — | 24 | ~1916 |
| Eleanor Pilar | Other | — | 19 | ~1921 |
| Dolores Boomer | Daughter | — | 13 | ~1927 |
| Arthur Merkle | Head | — | 32 | ~1908 |
| Mary Voter | Daughter | — | 6 | ~1934 |
| Mary Bartlett | Daughter | — | 15 | ~1925 |
| Laura Linden | Other | — | 32 | ~1908 |
| James Mccarthy | Other | — | 40 | ~1900 |
| Edward Sell | Other | — | 34 | ~1906 |
| Shreifera Mccarthy | Other | — | 5 | ~1935 |
Census Appearances
1930
Lake, Indiana
Daughter, age 5
Lake, Indiana · implied b. ~1925 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bartlett |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Lake-County, Indiana
Daughter, age 15
Lake-County, Indiana · implied b. ~1925 — 10 household members
| Surname | Bartlett |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Whiting City |
| 1935 Residence (County) | Lake |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Bartlett across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Bartlett
Daughter · 1940 · age 15 · b. ~1925 · Indiana
★ You are viewing this record
Sibling
Dolores Boomer
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Voter
Sibling · 1940 · age 6
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-t0627-01068-00547)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marie O. Muldoon | 77 | Head | — | Irish Free State |
| 42 | James Hatch | 74 | Boarder | — | Irish Free State |
| 43 | Charles Hessig | 72 | Lodger | — | Germany |
| 44 | Ida @ Clark | 73 | Head | — | Wisconsin |
| 45 | Erwin Lehr | 50 | Head | Pumper Helper | Indiana |
| 46 | Hattie O. Lehr | 47 | Wife | — | Indiana |
| 47 | Elrene Lehr | 20 | Daughter | Secretary | Indiana |
| 48 | Peter Benson | 77 | Head | — | Sweden |
| 49 | Amelia @ Benson | 71 | Wife | — | Sweden |
| 50 | Harry Benson | 44 | Son | Clerk | Indiana |
| 51 | Charles Koch | 46 | Head | Salesman | Illinois |
| 52 | Lucille @ Koch | 45 | Wife | — | Indiana |
| 53 | Harold Jr. Koch | 18 | Son | — | Illinois |
| 54 | Charles Koch | 9 | Son | — | Illinois |
| 55 | Ray @ Green | 42 | Head | Lawyer | Illinois |
| 56 | Ella Green | 42 | Wife | — | Indiana |
| 57 | Robert W. Green | 20 | Son | — | Indiana |
| 58 | Ruth A. Green | 17 | Daughter | — | Illinois |
| 59 | Augusta Klose | 70 | Mother-in-law | — | Germany |
| 60 | Cecil William Spurr | 24 | Lodger | Packer | Illinois |
| 61 | Charles Lee Spurr | 38 | Lodger | Utility Man | Illinois |
| 62 | Ralph Cunningham | 34 | Head | Pumper Helper | Illinois |
| 63 | Ruth @ Cunningham | 32 | Wife | — | Illinois |
| 64 | Arthur Merkle | 32 | Head | Machinist | Ohio |
| 65 | Lorinda @ Merkle | 24 | Wife | Housework | Indiana |
| 66 | Mary Ellen Bartlett THIS PERSON | 15 | Daughter | — | Kentucky |
| 67 | Edward Sell | 34 | Lodger | Laborer | Indiana |
| 68 | Eleanor Pilar | 19 | Lodger | — | Indiana |
| 69 | James S. Mccarthy | 40 | Lodger | Lawyer | Indiana |
| 70 | Shreifera Mccarthy | 5 | Lodger | — | Indiana |
| 71 | Dolores Boomer | 13 | Daughter | — | Illinois |
| 72 | Laura Linden | 32 | Lodger | Teacher | Oregon |
| 73 | Mary Ann Voter | 6 | Daughter | — | Illinois |
| 74 | Paul @ Dabbert | 49 | Head | Light Oil Foreman | Illinois |
| 75 | Edward Dabbert | 55 | Brother | Barrel Cleaner | Illinois |
| 76 | Sophie Dabbert | 25 | Aunt | — | Germany |
| 77 | Paul Dabbert | 15 | Son | — | Illinois |
| 78 | Frank Hardy | 47 | Lodger | — | Illinois |
| 79 | George F. Jones | 27 | Lodger | Chemical Engineer | Iowa |
| 80 | William Ehlert | 53 | Boarder | Machinist | Illinois |
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)