JK
John Kramer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hardin-County, Iowa
Our Model Tree links this John Kramer across the 1920, 1930 and 1940 US Censuses in Hardin-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 4-person household.
Age 56
b. ~1884
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hardin-County, Iowa |
| Surname | Kramer |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Alden |
| 1935 Residence (County) | Hardin |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Alden Twp |
| Est. Birth Year | ~1884 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Kramer | Head | — | 56 | ~1884 |
| Charles Kramer | Son | — | 11 | ~1929 |
| Roy Kramer | Son | — | 15 | ~1925 |
| Mary Kramer | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Hardin, Iowa
Head, age 36
Hardin, Iowa · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kraemer |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Farmer |
| Industry | Own farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Year of Naturalization | M |
| Birthplace (normalized) | iowa |
1930
Hardin, Iowa
Head, age 46
Hardin, Iowa · implied b. ~1884 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kraemer |
| Given Name | John M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 21 |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Radio Set | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Hardin-County, Iowa
Head, age 56
Hardin-County, Iowa · implied b. ~1884 — 4 household members
| Surname | Kramer |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Alden |
| 1935 Residence (County) | Hardin |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | S 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 John Kramer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kramer
Head · 1940 · age 56 · b. ~1884 · Iowa
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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 — Hardin-County, Iowa
Open full size
1940 US Federal Census — Hardin-County, Iowa
Page Contents
36 people indexed on this census page (nara:1940:m-t0627-01165-00024)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Giles Whitney | 59 | Head | Farmer | Iowa |
| 2 | Mollie Christie Whitney | 58 | Wife | Housework | Illinois |
| 3 | Robert S. Gordon | 51 | Head | Farmer | Illinois |
| 4 | Amy Gordon | 10 | Daughter | — | Illinois |
| 5 | Herbert Wessels | 49 | Head | Farmer | Holland |
| 6 | Elizabeth M. Wessels | 45 | Wife | Housework | Holland |
| 7 | John Evans | 34 | Head | Farming | Iowa |
| 8 | Mildred Grace Evans | 33 | Wife | Housework | Iowa |
| 9 | Ernest Burdell Schultz | 24 | Lodger | — | Minnesota |
| 10 | J. Rudolph Harms | 33 | Head | Farmer | Iowa |
| 11 | Hilda Ann Harms | 30 | Wife | Housework | Iowa |
| 12 | Lois Ann Harms | 3 | Daughter | — | Iowa |
| 13 | Ralph Everette Harms | 1 | Son | — | Iowa |
| 14 | John M. Kramer THIS PERSON | 56 | Head | Farmer | Iowa |
| 15 | Mary Edith Kramer | 58 | Wife | Housework | Iowa |
| 16 | Roy Russel Kramer | 15 | Son | — | Iowa |
| 17 | Charles Glen Kramer | 11 | Son | — | Iowa |
| 18 | Herman J. Rodney | 44 | Head | Farmer | Iowa |
| 19 | Celia Rodney | 71 | Mother | Housework | Wisconsin |
| 20 | Charles Enkes | 42 | Head | Farmer | Iowa |
| 21 | Florence Stella Enkes | 34 | Wife | Housework | Missouri |
| 22 | Robert John Enkes | 15 | Son | — | Iowa |
| 23 | Shirley May Enkes | 12 | Daughter | — | Iowa |
| 24 | Charlotte Lee Enkes | 11 | Daughter | — | Iowa |
| 25 | Frances Charles Enkes | 4 | Son | — | Iowa |
| 26 | Mary Lou Enkes | 2 | Daughter | — | Iowa |
| 27 | Henry Harkema | 41 | Head | Farmer | Minnesota |
| 28 | Villa Verna Harkema | 32 | Wife | Housework | Iowa |
| 29 | Beverly Ann Harkema | 10 | Daughter | — | Iowa |
| 30 | Ladonna L. Harkema | 7 | Daughter | — | Iowa |
| 31 | Willma Shirley Harkema | 4 | Daughter | — | Iowa |
| 32 | Harold Henry Harkema | 2 | Son | — | Iowa |
| 33 | Arthur Clinton Cook | 52 | Head | Farmer | Missouri |
| 34 | Ada Marie Cook | 51 | Wife | Housework | Missouri |
| 35 | Clinton Eugene Cook | 16 | Son | — | Missouri |
| 36 | Ethel May Cook | 12 | Daughter | — | Iowa |
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)