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Margaret Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Margaret Thomas across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Daniel & David — 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 | Thomas |
| Given Name | Margaret |
| 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 | operator |
| Industry | Telephone Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Operator |
| 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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Thomas | Daughter | — | 22 | ~1918 |
| Mary Thomas | Daughter | — | 13 | ~1927 |
| Daniel Thomas | Head | — | 48 | ~1892 |
| Mary Thomas | Other | — | 83 | ~1857 |
| Frank Thomas | Son | — | 20 | ~1920 |
| Jessie Thomas | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Polk, Iowa
Daughter, age 2
Polk, Iowa · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 12
Polk, Iowa · implied b. ~1918 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| 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 | Thomas |
| Given Name | Margaret |
| 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 | operator |
| Industry | Telephone Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| 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 Margaret Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Daniel Thomas (~0.92 confidence) and father David Thomas (~0.92 confidence) and father D Thomas (~0.92 confidence) and mother Jessie Thomas (~0.92 confidence) and mother Leona Poshlad (~0.92 confidence) and mother Hazel Thomas (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Daniel Thomas
b. ~1892
Source father
● Household
· direct · ~0.92
Father
David Thomas
b. ~1894
Source father
● Household
· direct · ~0.92
Father
D Thomas
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Jessie Thomas
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Leona Poshlad
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Hazel Thomas
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Thomas
Daughter · 1940 · age 22 · b. ~1918 · Iowa
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Sibling
Frank Thomas
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Thomas
Sibling · 1940 · age 13
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
40 people indexed on this census page (nara:1940:m-t0627-01195-00881)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rose M. Bellizzi | 28 | Wife | — | Iowa |
| 42 | Mary J. Bellizzi | 5 | Daughter | — | Iowa |
| 43 | Nick Bellizzi | 2 | Son | — | Iowa |
| 44 | Nick Bellizzi | 68 | Head | Policeman | Italy |
| 45 | Peter J. Mancuso | 36 | Son-in-law | Salesman | Iowa |
| 46 | Catherine Mancuso | 38 | Daughter | — | Iowa |
| 47 | Joseph Mancuso | 11 | Son | — | Iowa |
| 48 | Nick Mancuso | 9 | Son | — | Iowa |
| 49 | Edward Gable | 68 | Head | — | Iowa |
| 50 | Cora Gable | 56 | Wife | — | Iowa |
| 51 | Raymond Gable | 32 | Son | Maintenance Man | Iowa |
| 52 | Lois Gable | 26 | Daughter-in-law | Machine Operator | Iowa |
| 53 | Edward P. Morris | 60 | Head | Nurse | Tennessee |
| 54 | Paul Morris | 19 | Son | — | Nebraska |
| 55 | Orpha Fox | 60 | Head | — | Iowa |
| 56 | Fay Duncan | 43 | Niece | Homework | Iowa |
| 57 | Daniel Frank Thomas | 48 | Head | Landscaper | Iowa |
| 58 | Jessie Thomas | 45 | Wife | — | Minnesota |
| 59 | Margaret Thomas THIS PERSON | 22 | Daughter | Operator | Iowa |
| 60 | Frank Thomas | 20 | Son | Die Maker | Iowa |
| 61 | Mary Ann Thomas | 13 | Daughter | — | Iowa |
| 62 | Mary A. Thomas | 83 | Mother | — | Maryland |
| 63 | Vera Baldwin | 45 | Head | File Clerk | Kansas |
| 64 | Florence Fuller | 79 | Mother | — | Indiana |
| 65 | Fred Hedrick | 45 | Head | Custodian | Iowa |
| 66 | Gertrude Hedrick | 38 | Wife | — | Iowa |
| 67 | Darlene Hedrick | 16 | Daughter | — | Iowa |
| 68 | Roy Hedrick | 14 | Son | — | Iowa |
| 69 | Betty Jean Hedrick | 13 | Daughter | — | Iowa |
| 70 | Richard L. Hedrick | 10 | Son | — | Iowa |
| 71 | Deryll R. Hedrick | 4 | Son | — | Iowa |
| 72 | Anna Bunett | 63 | Mother-in-law | Truck Driver | Illinois |
| 73 | Byrl Wayne Eaton | 33 | Head | Paper Cutter | Iowa |
| 74 | Claribel B. Eaton | 32 | Wife | — | Iowa |
| 75 | Wilma Jean Eaton | 11 | Daughter | — | Iowa |
| 76 | Fred W. Mccammon | 50 | Head | Machinist Helper | Iowa |
| 77 | Ellen M. Mccammon | 65 | Wife | — | Iowa |
| 78 | Bertina Carpenter | 35 | Daughter | Pbx Operator | Iowa |
| 79 | Earl Thomas | 44 | Head | Reaper | Iowa |
| 80 | Edith Thomas | 42 | Wife | Nurse | Iowa |
Pedigree Summary
Margaret + 2 siblings
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)