MW
Mary Warren — 1940 US Census Record
Linked across censuses1940 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) — first a head (b.~1879), then head of a 6-person household.
Age 61
b. ~1879
Female
Head
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Warren |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1879 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| June Jackson | Daughter | — | 20 | ~1920 |
| Laura Warren | Daughter | — | 19 | ~1921 |
| Mary Warren | Head | — | 61 | ~1879 |
| Helen Stewart | Other | — | 20 | ~1920 |
| Gloria Stewart | Other | — | 4 | ~1936 |
| Louis Jackson | Other | — | 23 | ~1917 |
Census Appearances
1920
Polk, Iowa
Spouse, age 38
Polk, Iowa · implied b. ~1882 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warren |
| Given Name | Maggie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Spouse, age 49
Polk, Iowa · implied b. ~1881 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Warren |
| Given Name | Margaret A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 18 |
| 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
Head, age 61
Polk-County, Iowa · implied b. ~1879 — 6 household members
| Surname | Warren |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Highest Grade | No 8 |
| 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.
Show:
This person
Anchor record
Mary Warren
Head · 1940 · age 61 · b. ~1879 · Iowa
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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-t0627-01196-00846)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sam J. Ferris | 1 | Daughter | — | Iowa |
| 2 | Garnetine Lester | 47 | Head | Secretary | Illinois |
| 3 | — | None | — | — | — |
| 4 | Helen Trisler | 31 | Head | Secretary | Iowa |
| 5 | Isabelle Trisler | 9 | Daughter | — | Iowa |
| 6 | Norman Trisler | 6 | Son | — | Iowa |
| 7 | John G. Walker | 64 | Head | Laborer | Illinois |
| 8 | Augusta Walker | 61 | Wife | — | Germany |
| 9 | Eva H. Walker | 23 | Daughter | Saleslady | Iowa |
| 10 | John Walker | 15 | Son | — | Iowa |
| 11 | John J. Cunningham | 60 | Head | Stone Cutter | Iowa |
| 12 | Lula E. Cunningham | 57 | Wife | — | Iowa |
| 13 | Clarence Cunningham | 18 | Son | — | Iowa |
| 14 | Kenneth Cunningham | 12 | Nephew | — | Iowa |
| 15 | Harry M. Frazier | 64 | Head | Storeman | Illinois |
| 16 | Nora Frazier | 63 | Wife | — | Iowa |
| 17 | Milene Moore | 31 | Head | File Clerk | Iowa |
| 18 | Clifford Moore | 17 | Son | — | Iowa |
| 19 | Alice R. Moore | 16 | Daughter | — | Iowa |
| 20 | — | None | — | — | — |
| 21 | Arthur Bark | 47 | Head | — | Iowa |
| 22 | Eva Bark | 37 | Wife | Stenographer | Iowa |
| 23 | Mary Warren THIS PERSON | 61 | Head | — | Iowa |
| 24 | Laura Warren | 19 | Daughter | New Worker | Iowa |
| 25 | Louis Jackson | 23 | Son-in-law | Bell Hop | Missouri |
| 26 | June Jackson | 20 | Daughter | — | Iowa |
| 27 | Helen Stewart | 20 | Lodger | Dish Washer | Iowa |
| 28 | Gloria Stewart | 4 | Lodger girl | — | Iowa |
| 29 | Harry Heasley | 50 | Head | Furnace Tender | Iowa |
| 30 | Amelia Heasley | 52 | Wife | — | Iowa |
| 31 | Dean Heasley | 25 | Son | Painter | Illinois |
| 32 | William Robinson | 53 | Lodger | — | Iowa |
| 33 | Gunnar Berlin | 38 | Head | Control Operator | Sweden |
| 34 | Maxine Berlin | 24 | Wife | — | Iowa |
| 35 | Shirley A. Berlin | 4 | Daughter | — | Iowa |
| 36 | Judith J. Berlin | 1 | Daughter | — | Iowa |
| 37 | Harry W. Kruckenmeier | 70 | Head | — | Illinois |
| 38 | Martha J. Peace | 84 | Head | — | Kentucky |
| 39 | Oscar E. Carlson | 52 | Head | Coal Miner | Iowa |
| 40 | Hazel N. Carlson | 48 | Wife | — | Montana |
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)