DC
Dorothy Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Dorothy Cooper across the 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Cooper |
| Given Name | Dorothy M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Decatur Twp |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Decatur 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Cooper | Daughter | — | 11 | ~1929 |
| Beatrice Cooper | Daughter | — | 2 | ~1938 |
| John Cooper | Son | — | 9 | ~1931 |
| Maxine Cooper | Daughter | — | 10 | ~1930 |
| Edna Cooper | Daughter | — | 8 | ~1932 |
| Alfred Cooper | Head | — | 34 | ~1906 |
| Grace Cooper | Spouse | — | 32 | ~1908 |
| Frank Cooper | Son | — | 1 | ~1939 |
| Alfred Cooper | Son | — | 12 | ~1928 |
Census Appearances
1930
Marion, Indiana
Daughter, age 1
Marion, Indiana · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Daughter, age 11
Marion-County, Indiana · implied b. ~1929 — 9 household members
| Surname | Cooper |
| Given Name | Dorothy M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Decatur Twp |
| 1935 Residence (County) | Marion |
| 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 Dorothy Cooper across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Dorothy Cooper
Daughter · 1940 · age 11 · b. ~1929 · Indiana
★ You are viewing this record
Sibling
Edna Cooper
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maxine Cooper
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Cooper
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cooper
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Cooper
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Cooper
Sibling · 1940 · age 12
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
40 people indexed on this census page (nara:1940:m-t0627-01075-00291)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Virgil Bastien | 34 | Head | Manager | Indiana |
| 2 | Mary M. Bastien | 30 | Wife | — | Indiana |
| 3 | Donald Bastien | 12 | Son | — | Indiana |
| 4 | William Culps | 49 | Head | Painter | Indiana |
| 5 | Eva S. Culps | 40 | Wife | — | Alabama |
| 6 | William E. Culps | 23 | Son | Laborer | Indiana |
| 7 | Garland Walleen | 26 | Head | Insurance Agent | Indiana |
| 8 | Pauline Walleen | 25 | Wife | — | Indiana |
| 9 | Myron Walleen | 6 | Son | — | Indiana |
| 10 | Wilma Walleen | 5 | Daughter | — | Indiana |
| 11 | Alfred Cooper | 34 | Head | Laborer | Indiana |
| 12 | Grace A. Cooper | 32 | Wife | — | Indiana |
| 13 | Alfred J. Cooper | 12 | Son | — | Indiana |
| 14 | Dorothy M. Cooper THIS PERSON | 11 | Daughter | — | Indiana |
| 15 | Maxine G. Cooper | 10 | Daughter | — | Indiana |
| 16 | John V. Cooper | 9 | Son | — | Indiana |
| 17 | Edna A. Cooper | 8 | Daughter | — | Indiana |
| 18 | Beatrice R. Cooper | 2 | Daughter | — | Indiana |
| 19 | Frank E. Cooper | 1 | Son | — | Indiana |
| 20 | Raymond C. Cooper | 37 | Head | Repairman | Indiana |
| 21 | Ella Cooper | 32 | Wife | — | Indiana |
| 22 | Juanita Cooper | 3 | Daughter | — | Indiana |
| 23 | Russell Palmer | 33 | Head | Battery Builder | Indiana |
| 24 | Maggie Palmer | 32 | Wife | — | Indiana |
| 25 | Doris L. Palmer | 9 | Daughter | — | Indiana |
| 26 | Lilly M. Palmer | 7 | Daughter | — | Indiana |
| 27 | John T. Palmer | 1 | Son | — | Indiana |
| 28 | George B. Hanson | 52 | Head | Iron Worker | Wisconsin |
| 29 | Mary L. Hanson | 59 | Wife | — | Indiana |
| 30 | Maud Wallace | 48 | Mother-in-law | Seamstress | Indiana |
| 31 | William S. Mccartney | 34 | Head | Printer | Indiana |
| 32 | Doris A. Mccartney | 32 | Wife | — | Indiana |
| 33 | William G. Jr. Mccartney | 6 | Son | — | Indiana |
| 34 | Esther L. Mccartney | 4 | Daughter | — | Indiana |
| 35 | Jimmy L. Mccartney | 1 | Son | — | Indiana |
| 36 | Alfred E. Brown | 42 | Head | Salesman | Indiana |
| 37 | Helen M. Brown | 38 | Wife | — | Indiana |
| 38 | June M. Brown | 18 | Daughter | — | Indiana |
| 39 | Richard Young | 28 | Head | Salesman | Indiana |
| 40 | Francis Young | 23 | Wife | — | 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)