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John Shannon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Floyd-County, Iowa
Our Model Tree links this John Shannon across the 1930 and 1940 US Censuses in Floyd-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Floyd-County, Iowa |
| Surname | Shannon |
| Given Name | John B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R. |
| 1935 Residence (County) | Floyd |
| Additional Details | |
| Highest Grade | No 2 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Pleasant Grove Twp |
| Est. Birth Year | ~1927 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Delline Shannon | Daughter | — | 10 | ~1930 |
| Raymond Shannon | Other | — | 36 | ~1904 |
| Ladonne Shannon | Daughter | — | 4 | ~1936 |
| Clarence Shannon | Son | — | 4 | ~1936 |
| Oscar Perry | Head | — | 82 | ~1858 |
| Lula Shannon | Spouse | — | 24 | ~1916 |
| Carole Shannon | Daughter | — | 1 | ~1939 |
| Duane Shannon | Son | — | 7 | ~1933 |
| John Shannon | Son | — | 13 | ~1927 |
Census Appearances
1930
Floyd, Iowa
Son, age 2
Floyd, Iowa · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shannon |
| Given Name | John B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Floyd-County, Iowa
Son, age 13
Floyd-County, Iowa · implied b. ~1927 — 9 household members
| Surname | Shannon |
| Given Name | John B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R. |
| 1935 Residence (County) | Floyd |
| Highest Grade | No 2 |
| 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 Shannon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Shannon
Son · 1940 · age 13 · b. ~1927 · Iowa
★ You are viewing this record
Sibling
Duane Shannon
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Shannon
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delline Shannon
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ladonne Shannon
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carole Shannon
Sibling · 1940 · age 1
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 — Floyd-County, Iowa
Open full size
1940 US Federal Census — Floyd-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01161-00322)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorotha D. Von Tiger | 31 | Wife | — | Iowa |
| 2 | Marlene G. Von Tiger | 6 | Daughter | — | South Dakota |
| 3 | Charles H. Von Tiger | 4 | Son | — | Iowa |
| 4 | Mervin L. Von Tiger | 2 | Son | — | Iowa |
| 5 | Matt Kirsch | 58 | Head | Farmer | Iowa |
| 6 | John W. Tertch | 36 | Head | Rock Quarry | Iowa |
| 7 | Mable L. Tertch | 37 | Wife | — | Iowa |
| 8 | Betty J. Tertch | 14 | Daughter | — | Iowa |
| 9 | Lorraine E. Tertch | 12 | Daughter | — | Iowa |
| 10 | Roger G. Tertch | 9 | Son | — | Iowa |
| 11 | Doris J. Tertch | 7 | Daughter | — | Iowa |
| 12 | Jerry D. Tertch | 3 | Son | — | Iowa |
| 13 | John S. Obermeier | 49 | Head | Farmer | Wisconsin |
| 14 | Fredicka Obermeier | 64 | Wife | — | Germany |
| 15 | Percy Kneisel | 31 | Nephew | Truck Driver | Iowa |
| 16 | Ransom Fiddick | 60 | Head | Farmer | Illinois |
| 17 | Beatrice Fiddick | 58 | Wife | — | Iowa |
| 18 | B. Irene Fiddick | 15 | Daughter | — | Iowa |
| 19 | Wayne Pepper | 20 | Hired Hand | Laborer | Iowa |
| 20 | Charles Hurd | 59 | Head | Mason | Iowa |
| 21 | Barbara M. Hurd | 63 | Wife | — | Iowa |
| 22 | Lester Hurd | 22 | Son | Laborer | Iowa |
| 23 | Katherine B. Hurd | 18 | Daughter | — | Iowa |
| 24 | Matt T. Frein | 47 | Head | Farmer | Iowa |
| 25 | Marie Emma Frein | 39 | Wife | — | Iowa |
| 26 | Daniel E. Frein | 13 | Son | — | Iowa |
| 27 | Edward M. Frein | 10 | Son | — | Iowa |
| 28 | Mark E. Frein | 9 | Son | — | Iowa |
| 29 | Vilmeta M. Frein | 7 | Daughter | — | Iowa |
| 30 | Lucile E. Frein | 5 | Daughter | — | Iowa |
| 31 | Gladys J. Frein | 3 | Daughter | — | Iowa |
| 32 | Oscar Perry | 82 | Head | Farmer | Iowa |
| 33 | Raymond H. Shannon | 36 | Hired Hand | Laborer | Iowa |
| 34 | Lula F. Shannon | 24 | Wife | — | Nebraska |
| 35 | Clarence H. Shannon | 4 | Son | — | Iowa |
| 36 | John B. Shannon THIS PERSON | 13 | Son | — | Iowa |
| 37 | Delline D. Shannon | 10 | Daughter | — | Iowa |
| 38 | Duane L. Shannon | 7 | Son | — | Iowa |
| 39 | Ladonne C. Shannon | 4 | Daughter | — | Iowa |
| 40 | Carole M. Shannon | 1 | 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)