HC
Helen Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dakota-County, Minnesota
Our Model Tree links this Helen Cooper across the 1920, 1930 and 1940 US Censuses in Dakota-County, Minnesota (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 4-person household.
Age 45
b. ~1895
Female
Spouse
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Dakota-County, Minnesota |
| Surname | Cooper |
| Given Name | Helen |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | West St. Paul City |
| 1935 Residence (County) | Dakota |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same house |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | West St Paul City |
| Est. Birth Year | ~1895 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Cooper | Spouse | — | 45 | ~1895 |
| Edith Cooper | Daughter | — | 19 | ~1921 |
| Grover Cooper | Head | — | 55 | ~1885 |
| Karen Cooper | Daughter | — | 7 | ~1933 |
Census Appearances
1920
Dakota, Minnesota
Spouse, age 25
Dakota, Minnesota · implied b. ~1895 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Helen G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Dakota, Minnesota
Other, age 35
Dakota, Minnesota · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Helen C. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Age at First Marriage | 15 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Dakota-County, Minnesota
Spouse, age 45
Dakota-County, Minnesota · implied b. ~1895 — 4 household members
| Surname | Cooper |
| Given Name | Helen |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | West St. Paul City |
| 1935 Residence (County) | Dakota |
| Highest Grade | 4 |
| 1935 Residence | Same house |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Helen Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Helen Cooper
Spouse · 1940 · age 45 · b. ~1895 · Minnesota
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Dakota-County, Minnesota
Open full size
1940 US Federal Census — Dakota-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01918-00418)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joe Ann Darr | 5 | Niece | — | Minnesota |
| 2 | John Mager | 60 | Head | Carpenter | Germany |
| 3 | Catherine Mager | 53 | Wife | — | Minnesota |
| 4 | Mary Mager | 31 | Daughter | Clerk Dist | Minnesota |
| 5 | Frances Mager | 30 | Daughter | Order Filler | Minnesota |
| 6 | Rose Mager | 23 | Daughter | Packing | Minnesota |
| 7 | Margaret Mager | 19 | Daughter | Packing | Minnesota |
| 8 | Frank Vallant | 27 | Head | Pipe Layer | Minnesota |
| 9 | Dorothy Vallant | 19 | Sister | Stenographer | Minnesota |
| 10 | Herman Vallant | 16 | Brother | — | Minnesota |
| 11 | Howard Mickelsen | 33 | Head | Milkman | Minnesota |
| 12 | Ann Mickelsen | 29 | Wife | — | No. Dakota |
| 13 | Muriel Mickelsen | 9 | Daughter | — | Minnesota |
| 14 | Jeannette Mickelsen | 7 | Daughter | — | Minnesota |
| 15 | Reinhold Voelker | 51 | Head | Office Clerk | Germany |
| 16 | Ida Voelker | 53 | Wife | — | Wisconsin |
| 17 | John Walter | 40 | Head | Truck Driver | Minnesota |
| 18 | Marie Walter | 36 | Wife | — | Minnesota |
| 19 | Robert Walter | 6 | Son | — | Minnesota |
| 20 | Margaret Mary Walter | 5 | Daughter | — | Minnesota |
| 21 | Mary Jane Walter | 1 | Daughter | — | Minnesota |
| 22 | John Walter | 1 | Son | — | Minnesota |
| 23 | Fred Hochule | 48 | Head | Machine Operator | Minnesota |
| 24 | Rose Hochule | 45 | Wife | — | Minnesota |
| 25 | Ignatius Kahl | 87 | Head | — | Germany |
| 26 | Louis Kahl | 50 | Son | Office Clerk | Minnesota |
| 27 | Earl Stadler | 28 | Head | Stockman | Minnesota |
| 28 | Lillie Stadler | 26 | Wife | — | Minnesota |
| 29 | Dewey Stadler | 6 | Son | — | Minnesota |
| 30 | Judith Stadler | 2 | Daughter | — | Minnesota |
| 31 | Irene Stadler | 23 | Sister | Feeder | Minnesota |
| 32 | Frank Nentwig | 54 | Head | Welder | Germany |
| 33 | Ida Nentwig | 53 | Wife | — | Germany |
| 34 | Jack Nentwig | 17 | Son | — | Minnesota |
| 35 | Grover Cooper | 55 | Head | Freight Clerk | Virginia |
| 36 | Helen Cooper THIS PERSON | 45 | Wife | — | Minnesota |
| 37 | Edith Cooper | 19 | Daughter | Mangle Feeder | Minnesota |
| 38 | Karen Cooper | 7 | Daughter | — | Minnesota |
| 39 | Edward Thorne | 55 | Head | Metal Worker | Minnesota |
| 40 | Sadie Thorne | 50 | Wife | — | Minnesota |
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)