MC
Margaret Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this Margaret Cooper across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed), with identified parents Fergus & Maude — first a daughter (b.~1907), then head of a 6-person household.
Age 33
b. ~1907
Female
Daughter
Born: Missouri
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Cooper |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Divorced |
| Birthplace | Missouri |
| 1935 Residence (City) | Maplewood |
| 1935 Residence (County) | St. Louis |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Chemical Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1121 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Bookkeeper |
| Township / Ward | Maplewood |
| Est. Birth Year | ~1907 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Fergus Dickerson | Head | — | 60 | ~1880 |
| Gordon Ducking | Other | — | 9 | ~1931 |
| Norman Ducking | Other | — | 7 | ~1933 |
| Maude Dickerson | Spouse | — | 54 | ~1886 |
| Kenneth Cooper | Other | — | 7 | ~1933 |
| Margaret Cooper | Daughter | — | 33 | ~1907 |
Census Appearances
1920
St Louis, …
Other, age 11
St Louis, Missouri · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Margaret |
| Relationship to Head | Boarder |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
St Louis, …
Other, age 22
St Louis, Missouri · implied b. ~1908 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Margaret |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Separated |
| Birthplace | Missouri |
| Age at First Marriage | 3 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Saleslady |
| Industry | Department Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Daughter, age 33
St.-Louis-County, Missouri · implied b. ~1907 — 6 household members
| Surname | Cooper |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Divorced |
| Birthplace | Missouri |
| 1935 Residence (City) | Maplewood |
| 1935 Residence (County) | St. Louis |
| Occupation | Bookkeeper |
| Industry | Chemical Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1121 |
| Highest Grade | H 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fergus Dickerson (~0.92 confidence) and mother Maude Dickerson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fergus Dickerson
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Maude Dickerson
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Cooper
Daughter · 1940 · age 33 · b. ~1907 · Missouri
★ You are viewing this record
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-t0627-02150-00727)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Melvin Lagarehoff | 16 | Son | — | Missouri |
| 42 | Leona Lagarehoff | 15 | Daughter | — | Missouri |
| 43 | James R. Galloway | 39 | Head | Mechanic | Missouri |
| 44 | Betty M. Galloway | 15 | Daughter | — | Colorado |
| 45 | James R. Jr. Galloway | 11 | Son | — | Missouri |
| 46 | Mast, Elizabeth | 36 | Housekeeper | Housekeeper | Iowa |
| 47 | Fred Gueckmer | 61 | Head | Janitor | Missouri |
| 48 | Mary W. Salley | 55 | Head | Servant | Missouri |
| 49 | Robert W. Potter | 37 | Head | Salesman | Missouri |
| 50 | Hattie Potter | 23 | Wife | — | Arkansas |
| 51 | Bertha Hegeman | 69 | Head | — | Germany |
| 52 | Otto W. Hegeman | 41 | Son | Insulator | Missouri |
| 53 | Edwin Hegeman | 36 | Son | Partner | Missouri |
| 54 | Helen Sommers | 43 | Daughter | Stenographer | Missouri |
| 55 | Harold Sommers | 18 | Grandson | Electric Winder | Missouri |
| 56 | Raymond Sommers | 13 | Grandson | — | Missouri |
| 57 | John Hand | 54 | Head | Maintainance Man | Missouri |
| 58 | Minnie Hand | 54 | Wife | — | Missouri |
| 59 | Robbie Jr. Hand | 13 | Daughter | — | Missouri |
| 60 | Harold L. Walker | 36 | Son-in-law | Long Distance Truck Driver | Missouri |
| 61 | Beulah Walker | 36 | Daughter | — | Missouri |
| 62 | William J. Boehmer | 73 | Head | — | Missouri |
| 63 | Arthur E. Boehmer | 43 | Son | Salesman | Missouri |
| 64 | Fergus W. Dickerson | 60 | Head | Salesman | Missouri |
| 65 | Maude Dickerson | 54 | Wife | Servant | Nebraska |
| 66 | Margaret E. Cooper THIS PERSON | 33 | Daughter | Bookkeeper | Missouri |
| 67 | Kenneth B. Cooper | 7 | Grandson | — | Missouri |
| 68 | Gordon S. Ducking | 9 | Grandson | — | Missouri |
| 69 | Norman Ducking | 7 | Grandson | — | Missouri |
| 70 | John C. Miller | 53 | Head | Civil Engineer | Missouri |
| 71 | Helen L. Miller | 48 | Wife | — | Missouri |
| 72 | Virginia L. Miller | 19 | Daughter | — | Missouri |
| 73 | Jack C. Miller | 16 | Son | — | Missouri |
| 74 | Nora E. Butler | 51 | Sister-in-law | Secretary | Missouri |
| 75 | Fred E. Quayle | 29 | Head | Installer | Missouri |
| 76 | Katherine E. Quayle | 31 | Wife | Clerk | Missouri |
| 77 | Robert G. Winds | 27 | Head | Draftsman | Missouri |
| 78 | Ruth M. Winds | 22 | Wife | Motor Assembler | Missouri |
| 79 | Charles M. Wilson | 83 | Head | Laborer-Helper | Michigan |
| 80 | Marie W. Graner | 44 | Head | — | Missouri |
Pedigree Summary
Margaret
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)