MC
Margaret Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this Margaret Cooper across the 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 11-person household.
Age 10
b. ~1930
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Cooper |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Webster Groves City |
| 1935 Residence (County) | St Louis |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Webster Groves 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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Richard Cooper | Son | — | 12 | ~1928 |
| John Cooper | Son | — | 17 | ~1923 |
| John Cooper | Head | — | 45 | ~1895 |
| Annabel Cooper | Spouse | — | 40 | ~1900 |
| Virginia Cooper | Daughter | — | 22 | ~1918 |
| Alice Cooper | Daughter | — | 3 | ~1937 |
| Otis Cooper | Son | — | 19 | ~1921 |
| Theoplis Cooper | Son | — | 8 | ~1932 |
| Margaret Cooper | Daughter | — | 10 | ~1930 |
| Eugene Cooper | Son | — | 5 | ~1935 |
| Mary Cooper | Daughter | — | 15 | ~1925 |
Census Appearances
1930
St Louis, …
Daughter, age
St Louis, Missouri · implied b. ~1930 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Daughter, age 10
St.-Louis-County, Missouri · implied b. ~1930 — 11 household members
| Surname | Cooper |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Webster Groves City |
| 1935 Residence (County) | St Louis |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Margaret Cooper across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Cooper
Daughter · 1940 · age 10 · b. ~1930 · Missouri
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Sibling
John Cooper
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Otis Cooper
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Cooper
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Cooper
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Cooper
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cooper
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theoplis Cooper
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Cooper
Sibling · 1940 · age 22
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 — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02149-00766)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Nehemiah Hagens | 30 | Head | Janitor | Louisiana |
| 42 | Cecelia Hagens | 27 | Wife | — | Missouri |
| 43 | Nehemiah Jr Hagens | 5 | Son | — | Missouri |
| 44 | Cecil Hagens | 4 | Son | — | Missouri |
| 45 | Lulla Hagens | 2 | Daughter | — | Missouri |
| 46 | Leroy Hagens | 1 | Son | — | Missouri |
| 47 | Charley Walton | 46 | Head | Porter | Tennessee |
| 48 | Nancy Walton | 49 | Wife | — | Missouri |
| 49 | Julia Brown | 38 | Head | — | Mississippi |
| 50 | Myrtle Jones | 21 | Daughter | Servant | Mississippi |
| 51 | Clarence Jones | 14 | Son | — | Mississippi |
| 52 | James Moffett | 32 | Head | Chauffeur | Mississippi |
| 53 | Mary Simpson | 29 | Head | — | Louisiana |
| 54 | Robin Simpson | 11 | Son | — | Mississippi |
| 55 | Louis Simpson | 9 | Son | — | Mississippi |
| 56 | Mary Lee Simpson | 6 | Daughter | — | Mississippi |
| 57 | Artice Simpson | 4 | Daughter | — | Mississippi |
| 58 | Earl Glen Simpson | 1 | Son | — | Missouri |
| 59 | Laverne Simpson | 0 | Daughter | — | Missouri |
| 60 | Fella Williams | 61 | Head | — | Missouri |
| 61 | William Adams | 34 | Head | Orderly | Alabama |
| 62 | Lillie Adams | 29 | Wife | Servant | Alabama |
| 63 | Willie Jr Adams | 11 | Son | — | Alabama |
| 64 | John Cooper | 45 | Head | Laborer | Tennessee |
| 65 | Annabel Cooper | 40 | Wife | — | Tennessee |
| 66 | Virginia Cooper | 22 | Daughter | Servant | Kentucky |
| 67 | Otis Cooper | 19 | Son | — | Kentucky |
| 68 | John Lee Cooper | 17 | Son | — | Kentucky |
| 69 | Mary Cooper | 15 | Daughter | — | Kentucky |
| 70 | Richard Cooper | 12 | Son | — | Missouri |
| 71 | Margaret Cooper THIS PERSON | 10 | Daughter | — | Missouri |
| 72 | Theoplis Cooper | 8 | Son | — | Missouri |
| 73 | Eugene Cooper | 5 | Son | — | Missouri |
| 74 | Alice Cooper | 3 | Daughter | — | Missouri |
| 75 | Adalina Webster | 61 | Head | — | Tennessee |
| 76 | Anna Miles | 36 | Head | Housekeeping Aid | Tennessee |
| 77 | Helen Miles | 21 | Daughter | Servant | Missouri |
| 78 | Mildred Miles | 19 | Daughter | Servant | Missouri |
| 79 | Samella Miles | 16 | Daughter | — | Missouri |
| 80 | Charles Miles | 17 | Son | — | Missouri |
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)