AT
Alfred Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Winnebago-County, Iowa
Our Model Tree links this Alfred Thompson across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Iowa (XGBoost, ~Confirmed), with identified parents John & Harbor — first a head (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Iowa |
| Surname | Thompson |
| Given Name | Alfred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Occupation | Farmer |
| Industry | General Agric |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Logan Township |
| Est. Birth Year | ~1914 |
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 Alfred | Age | Birth yr |
|---|---|---|---|---|
| Mildred Thompson | Spouse | — | 21 | ~1919 |
| Darlene Thompson | Daughter | — | 6 | ~1934 |
| Alfred Thompson | Head | — | 26 | ~1914 |
Census Appearances
1920
Winnebago, Iowa
Son, age 6
Winnebago, Iowa · implied b. ~1914 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Alfred J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Winnebago, Iowa
Son, age 16
Winnebago, Iowa · implied b. ~1914 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Labor |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Winnebago-County, Iowa
Head, age 26
Winnebago-County, Iowa · implied b. ~1914 — 3 household members
| Surname | Thompson |
| Given Name | Alfred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Winnebago |
| Occupation | Farmer |
| Industry | General Agric |
| Class of Worker | OA |
| Hours Worked | 60 |
| 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 Alfred Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Thompson (~0.92 confidence) and mother Harbor Thompson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Thompson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Harbor Thompson
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Alfred Thompson
Head · 1940 · age 26 · b. ~1914 · 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 — Winnebago-County, Iowa
Open full size
1940 US Federal Census — Winnebago-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01213-00346)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Nels Bergstad | 62 | Head | Farmer | Iowa |
| 42 | Otto Bergstad | 14 | Nephew | — | Iowa |
| 43 | Millard Michaelson | 34 | Head | Farmer | Iowa |
| 44 | Gladys Michaelson | 30 | Wife | — | Iowa |
| 45 | Kenneth Michaelson | 7 | Son | — | Iowa |
| 46 | Joan Michaelson | 5 | Daughter | — | Iowa |
| 47 | Glenn Lamping | 13 | Nephew | — | Iowa |
| 48 | Berger Gunderson | 31 | Head | Farmer | Norway |
| 49 | Ethel Gunderson | 29 | Wife | — | Iowa |
| 50 | Kenneth Gunderson | 2 | Son | — | Iowa |
| 51 | Harry Berg | 35 | Head | Farmer | Iowa |
| 52 | Jorgina Berg | 70 | Mother | — | Norway |
| 53 | Thom Frostheim | 56 | Head | Farmer | Norway |
| 54 | Hattie Frostheim | 50 | Wife | — | Norway |
| 55 | Elmer Frostheim | 19 | Son | Farm Hand | Iowa |
| 56 | Gilman Frostheim | 18 | Son | Farm Hand | Iowa |
| 57 | Anna Frostheim | 16 | Daughter | — | Iowa |
| 58 | Gertie Frostheim | 14 | Daughter | — | Iowa |
| 59 | Clarice Frostheim | 8 | Daughter | — | Iowa |
| 60 | Alfred Thompson THIS PERSON | 26 | Head | Farmer | Iowa |
| 61 | Mildred Thompson | 21 | Wife | — | Iowa |
| 62 | Darlene Thompson | 6 | Daughter | — | Iowa |
| 63 | Henry Hanson | 52 | Head | Farmer | Iowa |
| 64 | Mabel Hanson | 43 | Wife | — | Iowa |
| 65 | Harry Olson | 22 | Hired man | Farm Hand | Iowa |
| 66 | Ole Solomonson | 30 | Head | Farmer | Iowa |
| 67 | Muriel Solomonson | 28 | Wife | — | Iowa |
| 68 | Mons Gunvordahl | 76 | Landlord | — | Norway |
| 69 | Edward Sprecher | 57 | Head | Farmer | Illinois |
| 70 | Fannie Sprecher | 52 | Wife | — | Iowa |
| 71 | Norma Sprecher | 17 | Daughter | — | Iowa |
| 72 | Russel Knutson | 32 | Hired man | Farm Hand | Iowa |
| 73 | Selma Cleven | 37 | Head | Farmer | Iowa |
| 74 | Selma Cleven | 34 | Wife | — | Iowa |
| 75 | Shirley Cleven | 5 | Daughter | — | Iowa |
| 76 | Elvin Larson | 44 | Brother-in-law | Farm Hand | Iowa |
| 77 | Nels Haugstad | 24 | Head | Farmer | Iowa |
| 78 | Nels Haugstad | 47 | Head | Farmer | Norway |
| 79 | Anna Haugstad | 47 | Wife | — | Norway |
| 80 | Signe Haugstad | 22 | Daughter | — | Iowa |
Related Census Records
Pedigree Summary
Alfred
Gen 1 · 2 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)