JL
John Logan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this John Logan across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1887), then head of a 3-person household.
Age 53
b. ~1887
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Logan |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Occupation | Switchman |
| Industry | Railway |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Switchman |
| Township / Ward | Davenport City |
| Est. Birth Year | ~1887 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Logan | Head | — | 53 | ~1887 |
| Kenneth Logan | Son | — | 23 | ~1917 |
| Theresa Logan | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Scott, Iowa
Head, age 32
Scott, Iowa · implied b. ~1888 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Logan |
| Given Name | John A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | United States |
| Mother's Birthplace | United States |
| Occupation | Switchman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Scott, Iowa
Head, age 43
Scott, Iowa · implied b. ~1887 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Logan |
| Given Name | John A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 23 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Iowa |
| Occupation | Switchman |
| Industry | Railroad Yards |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Scott-County, Iowa
Head, age 53
Scott-County, Iowa · implied b. ~1887 — 3 household members
| Surname | Logan |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Occupation | Switchman |
| Industry | Railway |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Logan 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 Logan
Head · 1940 · age 53 · b. ~1887 · 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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01202-00760)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 3 | Leslie Wagner | 71 | Head | — | Iowa |
| 4 | Anna Wagner | 66 | Wife | — | Iowa |
| 5 | Harold Bohnsack | 38 | Son-in-law | Machinist | Iowa |
| 6 | Essie Bohnsack | 40 | Daughter | — | Iowa |
| 7 | Paul Bohnsack | 12 | Son | — | Iowa |
| 8 | Harvey Wessel | 33 | Head | Truck Driver | Iowa |
| 9 | Helen Wessel | 30 | Wife | — | Iowa |
| 10 | Merle Wessel | 5 | Son | — | Iowa |
| 11 | Emma Schuezer | Schueyer | 37 | Sister-in-law | Bookkeeper | Iowa |
| 12 | Anna Kugelmeyer | 64 | Head | — | Iowa |
| 13 | Lawrence Kugelmeyer | 43 | Son | Core Maker | Iowa |
| 14 | Leonard Kugelmeyer | 39 | Son | — | Iowa |
| 15 | William Keller | 46 | Son-in-law | Conductor | Illinois |
| 16 | Lillian Keller | 41 | Daughter | — | Iowa |
| 17 | Fred Sheppelert | Sheppeleit | 24 | Head | Machinist | Illinois |
| 18 | Hilda Sheppelert | Sheppeleit | 24 | Wife | — | Iowa |
| 19 | Richard Sheppelert | Sheppeleit | 3 | Son | — | Iowa |
| 20 | Dorothy Lange | 19 | Sister-in-law | Waitress | Iowa |
| 21 | Edward Benz | 39 | Head | Tailor | Illinois |
| 22 | Margaret Benz | 35 | Wife | — | Iowa |
| 23 | Patricia Benz | 5 | Daughter | — | Wisconsin |
| 24 | William Reiss | 34 | Head | Electrician | Germany |
| 25 | Angela Reiss | 29 | Wife | Operator | Iowa |
| 26 | Albert Calon | 46 | Head | Mechanic | Illinois |
| 27 | Marie Calon | 45 | Wife | — | Iowa |
| 28 | Wayne Calon | 20 | Son | Tap Dancer | Iowa |
| 29 | Patsy Calon | 15 | Son | — | Iowa |
| 30 | Verne Hawkins | 20 | Lodger | Draftsman | Iowa |
| 31 | Glenn H. Miller | 51 | Head | Salesman | Iowa |
| 32 | Leila Miller | 49 | Wife | — | Iowa |
| 33 | Margaret Miller | 21 | Daughter | Tutor | Iowa |
| 34 | E. H. Howard | 38 | Head | Proprietor Garage | Iowa |
| 35 | Ruth Howard | 37 | Wife | Clerk | Iowa |
| 36 | Beverly Howard | 13 | Daughter | — | Iowa |
| 37 | Jerry Howard | 12 | Son | — | Iowa |
| 38 | Gary Howard | 6 | Son | — | Iowa |
| 39 | John H. Logan THIS PERSON | 53 | Head | Switchman | Illinois |
| 40 | Theresa Logan | 53 | Wife | — | Iowa |
| 41 | Kenneth Logan | 23 | Son | Salesman | 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)