MW
Mary Warren — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Warren across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Harry & Bess — first a daughter (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Warren |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Warren | Daughter | — | 15 | ~1925 |
| Mary Warren | Daughter | — | 21 | ~1919 |
| Harry Warren | Head | — | 59 | ~1881 |
| Alice Maland | Other | — | 28 | ~1912 |
| Bess Warren | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Polk, Iowa
Daughter, age 1
Polk, Iowa · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warren |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| 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 11
Polk, Iowa · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warren |
| Given Name | Mary H. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| 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 21
Polk-County, Iowa · implied b. ~1919 — 5 household members
| Surname | Warren |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Highest Grade | C 3 |
| 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 Mary Warren across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Warren (~0.92 confidence) and mother Bess Warren (~0.92 confidence) and mother Bess Warren (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Warren
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Bess Warren
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Bess Warren
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Warren
Daughter · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Sibling
Elizabeth Warren
Sibling · 1940 · age 15
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
39 people indexed on this census page (nara:1940:m-t0627-01193-00730)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sol S Ginsberg | 48 | Head | Executive | Iowa |
| 2 | Gertrude Ginsberg | 41 | Wife | Housewife | Iowa |
| 3 | Sheron A Ginsberg | 21 | Son | — | Iowa |
| 4 | Myra A Ginsberg | 23 | Daughter | — | Iowa |
| 5 | Della Casebolt | 45 | Servant | Housekeeper | Iowa |
| 6 | Herbert S Long | 41 | Head | Statistician | Wisc |
| 7 | Helen F Long | 39 | Wife | Housewife | Ill |
| 8 | George F Long | 12 | Son | — | Ill |
| 9 | Herbert Jr Long | 14 | Son | — | Ill |
| 10 | Ann Andrews | 31 | Maid | Maid | Iowa |
| 11 | Harry Warren | 59 | Head | Dispatcher | Iowa |
| 12 | Bess Warren | 55 | Wife | Housewife | Iowa |
| 13 | Mary Ann Warren THIS PERSON | 21 | Daughter | — | Iowa |
| 14 | Elizabeth Warren | 15 | Daughter | — | Iowa |
| 15 | Alice Maland | 28 | Maid | Maid | Iowa |
| 16 | Louis P Schwartzman | 47 | Head | Executive | Iowa |
| 17 | Ernest Schwartzman | 23 | Son | Photographer | Iowa |
| 18 | Ken T Schwartzman | 21 | Son | News Worker | Iowa |
| 19 | Fred D Bodtke | 48 | Head | Executive | Illinois |
| 20 | Nell Bodtke | 49 | Wife | Housewife | Iowa |
| 21 | Frederic A Bodtke | 24 | Son | Buyer | Iowa |
| 22 | Martha L Bodtke | 22 | Daughter | Cataloger | Iowa |
| 23 | Louis E Cohen | 50 | Head | Executive | — |
| 24 | Frances Cohen | 45 | Wife | Housewife | — |
| 25 | Jean M Cohen | 15 | Daughter | — | — |
| 26 | Hannah Kernstock | 81 | Mother-in-law | — | Poland |
| 27 | Clement A Sones | 44 | Head | Dr Int Med | Iowa |
| 28 | Mable Sones | 49 | Sister | Housewife | Iowa |
| 29 | Donald Sones | 12 | Son | — | Iowa |
| 30 | Jean Sones | 13 | Daughter | — | Iowa |
| 31 | — | None | Maid | — | — |
| 32 | Walter Muir | 54 | Head | Executive | Nebr |
| 33 | Celia Muir | 47 | Wife | Housewife | Iowa |
| 34 | Rita Rogers | 34 | Maid | Maid | Iowa |
| 35 | Ellis I Levitt | 47 | Head | Executive | Iowa |
| 36 | Nell Levitt | 44 | Wife | Housewife | Kansas |
| 37 | Madelyn Levitt | 15 | Daughter | — | Iowa |
| 38 | Richard Levitt | 10 | Son | — | Iowa |
| 39 | Raymond Mcelvogue | 21 | Chauffeur | Houseman | Montana |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 3 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)