JH
John Haas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Shelby-County, Iowa
Our Model Tree links this John Haas across the 1930 and 1940 US Censuses in Shelby-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Iowa |
| Surname | Haas |
| Given Name | John K |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Township |
| 1935 Residence (County) | Shelby |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Jackson Township |
| Est. Birth Year | ~1929 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Russell Haas | Son | — | 14 | ~1926 |
| James Haas | Son | — | 16 | ~1924 |
| Donald Haas | Son | — | 7 | ~1933 |
| Adolph Haas | Head | — | 53 | ~1887 |
| Amy Haas | Daughter | — | 13 | ~1927 |
| John Haas | Son | — | 11 | ~1929 |
| Johanna Haas | Spouse | — | 46 | ~1894 |
Census Appearances
Son, age 1
Shelby, Iowa · implied b. ~1929 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hess |
| Given Name | John K. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Denmark |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Shelby-County, Iowa
Son, age 11
Shelby-County, Iowa · implied b. ~1929 — 7 household members
| Surname | Haas |
| Given Name | John K |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Township |
| 1935 Residence (County) | Shelby |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| 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 Haas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Haas
Son · 1940 · age 11 · b. ~1929 · Iowa
★ You are viewing this record
Sibling
Russell Haas
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Amy Haas
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Haas
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Haas
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Shelby-County, Iowa
Open full size
1940 US Federal Census — Shelby-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01204-00303)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lester Christensen | 23 | Step-son | Farm Labor | Iowa |
| 42 | Hans N Hansen | 39 | Head | Farmer | Denmark |
| 43 | Ellen Hansen | 37 | Wife | — | Iowa |
| 44 | Russell Hansen | 15 | Son | Family Worker | Iowa |
| 45 | Vernon Robert Hansen | 12 | Son | — | Iowa |
| 46 | Virginia Rose Hansen | 10 | Daughter | — | Iowa |
| 47 | Egon Eruditson | 37 | Hired Labor | Farm Labor | Denmark |
| 48 | Ernest Hess | 51 | Head | Farmer | Iowa |
| 49 | Rose Hess | 44 | Wife | — | Iowa |
| 50 | Adolph Haas | 53 | Head | Farmer | Illinois |
| 51 | Johanna Haas | 46 | Wife | — | Denmark |
| 52 | James A Haas | 16 | Son | Family Worker | Iowa |
| 53 | Russell Haas | 14 | Son | Family Worker | Iowa |
| 54 | Amy A Haas | 13 | Daughter | — | Iowa |
| 55 | John K Haas THIS PERSON | 11 | Son | — | Iowa |
| 56 | Donald Eugene Haas | 7 | Son | — | Iowa |
| 57 | Hans C Hansen | 38 | Head | Farmer | Iowa |
| 58 | Inez Hansen | 36 | Wife | — | Iowa |
| 59 | Phillip Christensen | 43 | Head | Farmer | Iowa |
| 60 | Blanch Christensen | 39 | Wife | — | Iowa |
| 61 | Marjorie May Christensen | 10 | Daughter | — | Iowa |
| 62 | Eliza Thoiser | 73 | Mother-in-law | — | Illinois |
| 63 | Glen W Doonan | 44 | Head | Farmer | Iowa |
| 64 | Jessie Doonan | 43 | Wife | — | Iowa |
| 65 | Fern L Doonan | 20 | Daughter | — | Iowa |
| 66 | James Petersen | 55 | Head | Farmer | Iowa |
| 67 | Anna Petersen | 55 | Wife | — | Iowa |
| 68 | Lester L Petersen | 19 | Son | Family Worker | Iowa |
| 69 | Leon Virgil Petersen | 18 | Son | Family Worker | Iowa |
| 70 | J G Kemp | 46 | Head | Farmer | South Dakota |
| 71 | Jessie Kemp | 52 | Wife | — | Iowa |
| 72 | Genevieve Kemp | 21 | Son | Family Worker | Iowa |
| 73 | Zane W Kemp | 18 | Son | Family Worker | Iowa |
| 74 | John R Kemp | 13 | Son | — | Iowa |
| 75 | Erasmus Hansen | 46 | Head | Farmer | Iowa |
| 76 | Elsie Hansen | 39 | Wife | — | Virginia |
| 77 | Wayne Hansen | 17 | Son | Family Worker | Iowa |
| 78 | Norma Jane Hansen | 8 | Daughter | — | Iowa |
| 79 | Geo J Sorensen | 39 | Head | Farmer | Denmark |
| 80 | Amou Sorensen | 35 | Wife | — | Iowa |
Related Census Records
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)