HT
Helen Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Helen Thompson across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents James & Paul — first a daughter (b.~1920), then head of a 3-person household.
Age 20
b. ~1920
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Thompson |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Operator |
| Industry | Elevator building |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 650 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Operator |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1920 |
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 Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Thompson | Daughter | — | 20 | ~1920 |
| Faye Thompson | Head | — | 51 | ~1889 |
| Rachel Thompson | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Polk, Iowa
Daughter, age
Polk, Iowa · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Helen R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 10
Polk, Iowa · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Kansas |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 20
Polk-County, Iowa · implied b. ~1920 — 3 household members
| Surname | Thompson |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Operator |
| Industry | Elevator building |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 650 |
| Highest Grade | H 4 |
| 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 Helen Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Thompson (~0.92 confidence) and father Paul Thompson (~0.92 confidence) and father Faye Thompson (~0.92 confidence) and mother Helen Thompson (~0.92 confidence) and mother Rachel Thompson (~0.92 confidence) and mother Rachel Thompson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Thompson
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Paul Thompson
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Faye Thompson
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Helen Thompson
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Rachel Thompson
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Rachel Thompson
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Thompson
Daughter · 1940 · age 20 · b. ~1920 · 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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01194-00079)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George E. Knight | 49 | Head | Service Manager | Iowa |
| 2 | Ethel V. Knight | 47 | Wife | — | Iowa |
| 3 | Leslie Roller | 44 | Head | Secretary | Iowa |
| 4 | Minnie Roller | 43 | Wife | — | Nebraska |
| 5 | Gilbert Roller | 10 | Son | — | Iowa |
| 6 | James Roller | 5 | Son | — | Iowa |
| 7 | Russell Ross | 37 | Head | Artist | Iowa |
| 8 | Jule Ross | 35 | Wife | — | Iowa |
| 9 | Margot Ross | 5 | Daughter | — | Iowa |
| 10 | Rolland W. Davis | 33 | Head | Operator | Iowa |
| 11 | Wilma Davis | 31 | Wife | Clerk | Iowa |
| 12 | Louise Goddie | 29 | Lodger | Clerk | Iowa |
| 13 | Faye Thompson | 51 | Head | Salesman | Iowa |
| 14 | Rachel Thompson | 47 | Wife | — | Iowa |
| 15 | Helen Thompson THIS PERSON | 20 | Daughter | Operator | Iowa |
| 16 | Eugene Kinderman | 52 | Head | Shipping Clerk | Missouri |
| 17 | Theresa Kinderman | 53 | Wife | — | Minnesota |
| 18 | Richard Morris | 31 | Son-in-law | Fireman | Iowa |
| 19 | Caroline Morris | 23 | Daughter | — | Minnesota |
| 20 | Richard Morris | 4 | Grandson | — | Iowa |
| 21 | Garry Morris | 2 | Grandson | — | Iowa |
| 22 | C. Earl Wright | 38 | Head | Clerk | Missouri |
| 23 | Florence Wright | 35 | Wife | — | Iowa |
| 24 | Bonny J. Wright | 14 | Daughter | — | Iowa |
| 25 | Robert Wright | 11 | Daughter | — | Iowa |
| 26 | William Bradford | 63 | Father-in-law | — | Illinois |
| 27 | Robert Bradford | 19 | Brother-in-law | New Worker | Iowa |
| 28 | Cornelius Hogevoning | 59 | Head | Telegraph | Iowa |
| 29 | Sylvia Hogevoning | 51 | Wife | — | Iowa |
| 30 | Carl Bricker | 41 | Head | Salesman | Iowa |
| 31 | Grace Bricker | 39 | Wife | — | Iowa |
| 32 | Gloria Bricker | 14 | Daughter | — | Iowa |
| 33 | Rodney Bricker | 7 | Son | — | Iowa |
| 34 | Pearl Vanders | 43 | Head | — | Iowa |
| 35 | Wilma Vanders | 12 | Daughter | — | Iowa |
| 36 | Frank Vanders | 10 | Son | — | Iowa |
| 37 | J. Raymond Cox | 29 | Head | Glass Blower | Missouri |
| 38 | Elnora Cox | 22 | Wife | — | Illinois |
| 39 | Herschel Dawson | 33 | Head | Clerk | Iowa |
| 40 | Alice Dawson | 33 | Wife | — | Iowa |
Pedigree Summary
Helen
Gen 1 · 6 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)