ET
Elizabeth Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Elizabeth Thompson across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Alexander & Ruth — first a daughter (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Thompson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Office work |
| Industry | Steel Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Office Work |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1918 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Elizabeth | Age | Birth yr |
|---|---|---|---|---|
| Jessie Thompson | Daughter | — | 25 | ~1915 |
| Elizabeth Thompson | Daughter | — | 22 | ~1918 |
| Alexander Thompson | Head | — | 57 | ~1883 |
| Alexander Thompson | Son | — | 17 | ~1923 |
| Emmett Thompson | Son | — | 14 | ~1926 |
| Ruth Thompson | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Polk, Iowa
Daughter, age 2
Polk, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| 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 |
1930
Polk, Iowa
Daughter, age 12
Polk, Iowa · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 22
Polk-County, Iowa · implied b. ~1918 — 6 household members
| Surname | Thompson |
| Given Name | Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Office work |
| Industry | Steel Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| 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 Elizabeth Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alexander Thompson (~0.92 confidence) and mother Ruth Thompson (~0.92 confidence) and father Reginald Thompson (~0.92 confidence) and father Alan Thompson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alexander Thompson
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Ruth Thompson
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Reginald Thompson
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Alan Thompson
b. ~1884
Source father
● Household
· direct · ~0.92
This person
Anchor record
Elizabeth Thompson
Daughter · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Jessie Thompson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emmett Thompson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alexander Thompson
Sibling · 1940 · age 17
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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-01193-00561)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank E Brent | 53 | Head | Salesman | Nebraska |
| 2 | Anna M Brent | 49 | Wife | — | Nebraska |
| 3 | Edwin J Brent | 24 | Son | Manager | Iowa |
| 4 | Arthur P Brent | 22 | Son | Salesman | Iowa |
| 5 | Frank E Jr Brent | 20 | Son | — | Iowa |
| 6 | Henry P Oneil | 61 | Head | Engineer | Iowa |
| 7 | Treba Oneil | 62 | Wife | — | Iowa |
| 8 | Margaret Oneil | 32 | Daughter | — | Iowa |
| 9 | Patricia Oneil | 22 | Daughter | — | Iowa |
| 10 | Gordon G Young | 48 | Head | Clerk | Iowa |
| 11 | Edith S Young | 50 | Wife | — | Kansas |
| 12 | Clea Young | 20 | Daughter | Clerk | Kansas |
| 13 | Margaret Young | 16 | Daughter | — | Iowa |
| 14 | Thomas J Butler | 62 | Head | Fireman | Iowa |
| 15 | Callie Butler | 62 | Wife | — | Kansas |
| 16 | Alexander Thompson | 57 | Head | Engineer | Iowa |
| 17 | Ruth Thompson | 57 | Wife | Office Work | Iowa |
| 18 | Jessie R Thompson | 25 | Daughter | — | Iowa |
| 19 | Elizabeth Thompson THIS PERSON | 22 | Daughter | Office Work | Iowa |
| 20 | Alexander Thompson | 17 | Son | — | Iowa |
| 21 | Emmett R Thompson | 14 | Son | — | Nebraska |
| 22 | Mandy L Eastman | 50 | Head | Office Work | Nebraska |
| 23 | Milo Eastman | 22 | Son | — | Iowa |
| 24 | Raymond P Eastman | 18 | Son | — | Iowa |
| 25 | Lulu B Emery | 71 | Mother | — | Iowa |
| 26 | Lake E Master | 57 | Lodger | Office Work | Iowa |
| 27 | Alvin G Blinton | 57 | Lodger | Packer | Iowa |
| 28 | Ethel Blinton | 49 | Lodger | — | Iowa |
| 29 | Arthur Leejons | 57 | Head | Manager | Michigan |
| 30 | Berna Leejons | 45 | Wife | — | Michigan |
| 31 | Chas Jewell | 45 | Head | Chef | Iowa |
| 32 | Violet Jewell | 45 | Wife | — | Iowa |
| 33 | Martha Pauline Jewell | 3 | Daughter | — | Iowa |
| 34 | Lewis Lille | 20 | Lodger | Hotel | Washington |
| 35 | Homer A Benjamin | 54 | Head | Manager | Michigan |
| 36 | Mary Benjamin | 52 | Wife | — | Ohio |
| 37 | Gerald B Benjamin | 23 | Son | — | Iowa |
Related Census Records
Pedigree Summary
Elizabeth + 3 siblings
Gen 1 · 4 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)