MK
Mary Koch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Scotts-Bluff-County, Nebraska
Our Model Tree links this Mary Koch across the 1930 and 1940 US Censuses in Scotts-Bluff-County, Nebraska (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 6-person household.
Age 41
b. ~1899
Female
Spouse
Born: Russia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Scotts-Bluff-County, Nebraska |
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Mitchell Precinct |
| 1935 Residence (County) | Scottsbluff |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | Housework |
| Industry | Home |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
| Occupation | Housework |
| Township / Ward | Mitchell Precinct |
| Est. Birth Year | ~1899 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Jacob Koch | Head | — | 54 | ~1886 |
| Mary Koch | Spouse | — | 41 | ~1899 |
| Joan Koch | Daughter | — | 6 | ~1934 |
| Wilbur Koch | Son | — | 12 | ~1928 |
| Mollie Koch | Daughter | — | 15 | ~1925 |
| Helen Koch | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Scotts Bluff, …
Other, age 28
Scotts Bluff, Nebraska · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Alien |
| Year of Immigration | 1923 |
| Age at First Marriage | 18 |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Can Read/Write | Yes |
| Mother Tongue | Russian |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1940
Scotts-Bluff-County, Nebraska
Spouse, age 41
Scotts-Bluff-County, Nebraska · implied b. ~1899 — 6 household members
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Mitchell Precinct |
| 1935 Residence (County) | Scottsbluff |
| Naturalization Status | Alien |
| Occupation | Housework |
| Industry | Home |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
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 Koch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Koch
Spouse · 1940 · age 41 · b. ~1899 · Nebraska
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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 — Scotts-Bluff-County, Nebraska
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1940 US Federal Census — Scotts-Bluff-County, Nebraska
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02264-00483)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Donald Campbell | 7 | Son | — | Nebraska |
| 42 | Doris Campbell | 5 | Daughter | — | Nebraska |
| 43 | Sandra Campbell | 3 | Daughter | — | Nebraska |
| 44 | Anastacia Andrade | 47 | Head | Beet Laborer | Mexico |
| 45 | Anna Marie Andrade | 25 | Wife | Housework | Kansas |
| 46 | Adelita Andrade | 16 | Daughter | — | Nebraska |
| 47 | R. W. Hubbard | 40 | Head | Farmer | Nebraska |
| 48 | Ferne Hubbard | 18 | Daughter | — | Nebraska |
| 49 | Max Hubbard | 10 | Son | — | Nebraska |
| 50 | Rawleigh Scott | 56 | Head | Retired Farmer | Iowa |
| 51 | Hattie Scott | 50 | Wife | Housework | Nebraska |
| 52 | Owen Scott | 25 | Son | Truck Driver | Nebraska |
| 53 | Elmer Casson | 47 | Head | Farmer | Nebraska |
| 54 | Ida Casson | 45 | Wife | Housework | Indiana |
| 55 | James Casson | 13 | Son | — | Nebraska |
| 56 | Charles Williams | 50 | Head | Farm Laborer | Nebraska |
| 57 | Dorothy Williams | 20 | Wife | Housework | Nebraska |
| 58 | Raymond Graham | 26 | Lodger | Farm Labor | Iowa |
| 59 | Jacob Koch | 54 | Head | Farmer | Russia |
| 60 | Mary Koch THIS PERSON | 41 | Wife | Housework | Russia |
| 61 | Helen Koch | 18 | Daughter | House Keeper | Nebraska |
| 62 | Mollie Koch | 15 | Daughter | Housework | Nebraska |
| 63 | Wilbur Koch | 12 | Son | — | Nebraska |
| 64 | Joan Koch | 6 | Daughter | — | Nebraska |
| 65 | Albert Nix | 47 | Head | Farmer | Missouri |
| 66 | Cora Nix | 39 | Wife | Housework | Nebraska |
| 67 | Bonnita Nix | 13 | Daughter | — | Nebraska |
| 68 | Norma Jean Nix | 7 | Daughter | — | Nebraska |
| 69 | Loyd Miller | 24 | Head | Farm Laborer | Nebraska |
| 70 | Jenieva Miller | 20 | Wife | Housework | Missouri |
| 71 | Lester Ray Miller | 1 | Son | — | Missouri |
| 72 | O. W. Campbell | 52 | Head | Farmer | Kansas |
| 73 | Iona Campbell | 50 | Wife | Housework | Nebraska |
| 74 | Wanda Campbell | 15 | Daughter | — | Wyoming |
| 75 | Al Slocum | 25 | Lodger | Farm Laborer | Nebraska |
| 76 | Jane Brown | 75 | Head | — | Iowa |
| 77 | James A. Fanning | 42 | Head | Farmer | Nebraska |
| 78 | Mary J. Fanning | 40 | Wife | Teacher | Nebraska |
| 79 | Richard Scott | 32 | Head | Farm Laborer | Nebraska |
| 80 | Lenore Scott | 25 | Wife | Housework | Nebraska |
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)