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John Jenkins — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allamakee-County, Iowa
Our Model Tree links this John Jenkins across the 1920, 1930 and 1940 US Censuses in Allamakee-County, Iowa (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allamakee-County, Iowa |
| Surname | Jenkins |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ludlow Twp |
| 1935 Residence (County) | Allamakee |
| Additional Details | |
| Occupation | Farming |
| Industry | at Home |
| Class of Worker | OA |
| Hours Worked | 85 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farming |
| Township / Ward | Ludlow Twp |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| Myrna Jenkins | Daughter | — | 3 | ~1937 |
| John Jenkins | Head | — | 31 | ~1909 |
| Gerald Jenkins | Son | — | 7 | ~1933 |
| Wilma Jenkins | Spouse | — | 27 | ~1913 |
Census Appearances
1920
Allamakee, Iowa
Son, age 10
Allamakee, Iowa · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jenkins |
| Given Name | John R. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Allamakee, Iowa
Son, age 21
Allamakee, Iowa · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jenkins |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Allamakee-County, Iowa
Head, age 31
Allamakee-County, Iowa · implied b. ~1909 — 4 household members
| Surname | Jenkins |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ludlow Twp |
| 1935 Residence (County) | Allamakee |
| Occupation | Farming |
| Industry | at Home |
| Class of Worker | OA |
| Hours Worked | 85 |
| Income (1939) | 0 |
| Highest Grade | No 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 Jenkins across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Jenkins (~0.92 confidence) and father John Jenkins (~0.92 confidence) and mother Clara Jenkins (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Jenkins
b. ~1875
Source father
● Household
· direct · ~0.92
Father
John Jenkins
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Clara Jenkins
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Jenkins
Head · 1940 · age 31 · b. ~1909 · Iowa
★ 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 — Allamakee-County, Iowa
Open full size
1940 US Federal Census — Allamakee-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01136-00950)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dale Kiesau | 9 | Son | — | Iowa |
| 2 | Dean Kiesau | 2 | Son | — | Iowa |
| 3 | Walter Hagen | 30 | Head | Farmer | Iowa |
| 4 | Bernice Hagen | 28 | Wife | — | Iowa |
| 5 | Reuben Kruger | 24 | Head | Farmer | Iowa |
| 6 | Norma Kruger | 20 | Wife | — | Iowa |
| 7 | James Kruger | 0 | Son | — | Iowa |
| 8 | Donald Kruger | 17 | Hired help | Farm Helper | Iowa |
| 9 | Elmer Flage | 41 | Head | Farming | Iowa |
| 10 | Alvena Flage | 37 | Wife | — | Iowa |
| 11 | Gladys Flage | 8 | Daughter | — | Iowa |
| 12 | Violet Flage | 5 | Daughter | — | Iowa |
| 13 | Sophia L. Flage | 74 | Mother | — | Iowa |
| 14 | Fred Flage | 53 | Brother | Farm Helper | Iowa |
| 15 | Paul Helming | 44 | Head | Farmer | Iowa |
| 16 | Lydia Helming | 45 | Wife | — | Iowa |
| 17 | Ralph Helming | 22 | Son | Farm Helper | Iowa |
| 18 | Alice Helming | 17 | Daughter | — | Iowa |
| 19 | Donna Jean Helming | 11 | Daughter | — | Iowa |
| 20 | John C. Jenkins THIS PERSON | 31 | Head | Farming | Iowa |
| 21 | Wilma Jenkins | 27 | Wife | — | Iowa |
| 22 | Gerald M. Jenkins | 7 | Son | — | Iowa |
| 23 | Myrna J. Jenkins | 3 | Daughter | — | Iowa |
| 24 | Ray B. Flage | 39 | Head | Farming | Iowa |
| 25 | Stella Flage | 39 | Wife | — | Iowa |
| 26 | Donald Flage | 17 | Son | Farming | Iowa |
| 27 | Paul Hanke | 43 | Head | Farming | Iowa |
| 28 | Martha Hanke | 39 | Wife | — | Iowa |
| 29 | June Hanke | 12 | Daughter | — | Iowa |
| 30 | Harry Mae Hanke | 7 | Daughter | — | Iowa |
| 31 | John W. Jenkins | 65 | Head | Farming | Iowa |
| 32 | Clara Jenkins | 55 | Wife | — | Iowa |
| 33 | M. Jean Jenkins | 15 | Daughter | — | Iowa |
| 34 | John F. Flage | 53 | Head | Farming | Iowa |
| 35 | Emma L. Flage | 48 | Wife | — | Iowa |
| 36 | Geneva C. Flage | 23 | Daughter | — | Iowa |
| 37 | Mildred A. Flage | 21 | Daughter | Farming | Iowa |
| 38 | John Flage | 70 | Head | Farming | Iowa |
| 39 | Minnie Flage | 63 | Wife | — | Iowa |
| 40 | Albert Winke | 41 | Head | Farming | Iowa |
Pedigree Summary
John
Gen 1 · 3 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)