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Louis Schmidt — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Louis Schmidt across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1861), then head of a 4-person household.
Age 79
b. ~1861
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Schmidt |
| Given Name | Louis T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Davenport City |
| Est. Birth Year | ~1861 |
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 Louis | Age | Birth yr |
|---|---|---|---|---|
| Lucy Schmidt | Daughter | — | 38 | ~1902 |
| Louis Schmidt | Head | — | 79 | ~1861 |
| Gertrude Schmidt | Daughter | — | 40 | ~1900 |
| Amelia Schmidt | Spouse | — | 73 | ~1867 |
Census Appearances
1920
Scott, Iowa
Head, age 59
Scott, Iowa · implied b. ~1861 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schmidt |
| Given Name | Louis C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Carpenter |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Scott, Iowa
Head, age 69
Scott, Iowa · implied b. ~1861 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schmidt |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 69 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 29 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Carpenter |
| Industry | building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Head, age 79
Scott-County, Iowa · implied b. ~1861 — 4 household members
| Surname | Schmidt |
| Given Name | Louis T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Highest Grade | No 8 |
| 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 Louis Schmidt across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Louis Schmidt
Head · 1940 · age 79 · b. ~1861 · 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
40 people indexed on this census page (nara:1940:m-t0627-01203-00831)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Doolan | 4 | Son | — | Maryland |
| 2 | Othmar G. Mangels | 38 | Head | Fireman | Iowa |
| 3 | Josephine Mangels | 37 | Wife | — | Iowa |
| 4 | Edward Mangels | 15 | Son | — | Iowa |
| 5 | Shirley Mangels | 10 | Daughter | — | Iowa |
| 6 | Russell T. Johnson | 33 | Head | Salesman | Iowa |
| 7 | Doris A. Johnson | 32 | Wife | — | Iowa |
| 8 | Jeannine Johnson | 8 | Daughter | — | Iowa |
| 9 | Richard Johnson | 6 | Son | — | Iowa |
| 10 | Sheila Johnson | 1 | Daughter | — | Iowa |
| 11 | Donald D. Odell | 30 | Head | Machinist | Iowa |
| 12 | Maude Odell | 54 | Mother | — | Iowa |
| 13 | Adolph Groth | 26 | Head | Clerk | Iowa |
| 14 | Mildred A. Groth | 24 | Wife | Stenographer | Iowa |
| 15 | Maurice L. Sparkes | 29 | Head | Clerical | Iowa |
| 16 | Dorothy Sparkes | 24 | Wife | — | Nebraska |
| 17 | Fay Trees | 32 | Roomer | Manager | Iowa |
| 18 | Louis T. Schmidt THIS PERSON | 79 | Head | — | Iowa |
| 19 | Amelia Schmidt | 73 | Wife | — | Iowa |
| 20 | Gertrude Schmidt | 40 | Daughter | Teacher | Iowa |
| 21 | Lucy Schmidt | 38 | Daughter | Teacher | Iowa |
| 22 | Annie A. Gould | 57 | Head | Own | Iowa |
| 23 | George Wahlig | 71 | Head | — | Iowa |
| 24 | Mary E. Wahlig | 65 | Wife | — | Iowa |
| 25 | Lee Wahlig | 43 | Daughter | Salesman | Iowa |
| 26 | Helen Wahlig | 31 | Daughter | Assistant | Iowa |
| 27 | George Wahlig | 29 | Son | Clerk | Iowa |
| 28 | Margaret Russell | 33 | Daughter | Saleslady | Iowa |
| 29 | Elizabeth Russell | 7 | Daughter | — | Iowa |
| 30 | Theodore T. Eggers | 61 | Head | Weatherstripping | Iowa |
| 31 | Rosalie B. Eggers | 66 | Wife | — | Illinois |
| 32 | Ruth Eggers | 34 | Daughter | Nurse | Illinois |
| 33 | John L. Cannes | 35 | Head | Draftsman | Minnesota |
| 34 | Jean Cannes | 35 | Wife | — | Maryland |
| 35 | Lois Cannes | 6 | Daughter | — | Minnesota |
| 36 | Phyllis Cannes | 4 | Daughter | — | Minnesota |
| 37 | Mary Murphy | 42 | Head | Secretary | Iowa |
| 38 | Thomas Murphy | 40 | Brother | — | Iowa |
| 39 | Annabeth Murphy | 38 | Sister | Secretary | Iowa |
| 40 | John Murphy | 17 | Nephew | — | 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)