MO
Mary Oliver — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Oliver across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Arthur & Robert — first a daughter (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Oliver |
| Given Name | Mary E |
| 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 | Clerical |
| Industry | Meredith Publishing Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 266 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Clerical |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Oliver | Daughter | — | 22 | ~1918 |
| R Oliver | Head | — | 44 | ~1896 |
| Betty Oliver | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Polk, Iowa
Daughter, age 1
Polk, Iowa · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Oliver |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Mother Tongue | Italian |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 12
Polk, Iowa · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Oliver |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| 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 — 3 household members
| Surname | Oliver |
| Given Name | Mary E |
| 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 | Clerical |
| Industry | Meredith Publishing Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 266 |
| 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 Mary Oliver across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Arthur Oliver (~0.92 confidence) and father Robert Oliver (~0.92 confidence) and mother Victoria Oliver (~0.92 confidence) and mother Betty Oliver (~0.92 confidence) and father R Oliver (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arthur Oliver
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Robert Oliver
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Victoria Oliver
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Betty Oliver
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
R Oliver
b. ~1896
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Oliver
Daughter · 1940 · age 22 · b. ~1918 · 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-t0627-01193-00874)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lula Jones | 26 | Wife | Waitress | Iowa |
| 2 | Charles W Jones | 5 | Son | — | Iowa |
| 3 | Miller Madge Jones | 67 | Head | Pantry Cook | Iowa |
| 4 | Richard J Miller | 35 | Head | Locomotive Fireman | Iowa |
| 5 | Alice R Miller | 39 | Wife | — | Illinois |
| 6 | Stanley G Miller | 14 | Son | — | Iowa |
| 7 | Janet E Miller | 12 | Daughter | — | Iowa |
| 8 | Phillip R Miller | 8 | Son | — | Iowa |
| 9 | Twyla J Miller | 6 | Daughter | — | Iowa |
| 10 | Sharon R Miller | 4 | Daughter | — | Iowa |
| 11 | Sandra S Miller | 3 | Daughter | — | Iowa |
| 12 | R W Oliver | 44 | Head | Cab Driver | Iowa |
| 13 | Betty T Oliver | 47 | Wife | — | Germany |
| 14 | Mary E Oliver THIS PERSON | 22 | Daughter | Clerical | Iowa |
| 15 | Robert T Hansen | 45 | Head | City Fireman | Iowa |
| 16 | Louise G Hansen | 38 | Wife | — | Iowa |
| 17 | Mary C Subdon | 50 | Head | — | Norway |
| 18 | Chas S Callison | 47 | Head | Seamstress | Iowa |
| 19 | Anna V Callison | 43 | Wife | Seamstress | Iowa |
| 20 | Chas S Jr Callison | 23 | Son | Mill Operator | Iowa |
| 21 | Raymond Callison | 9 | Son | — | Iowa |
| 22 | Frank W Bell | 62 | Head | Engineer | Iowa |
| 23 | May B Bell | 58 | Wife | — | Missouri |
| 24 | Donald C Linn | 32 | Head | Truck Driver | Montana |
| 25 | Inez A Linn | 30 | Wife | Cosmetic | Iowa |
| 26 | La Berta B Linn | 2 | Daughter | — | Iowa |
| 27 | Arthur Townsend | 28 | Head | Truck Driver | Iowa |
| 28 | Stella P Townsend | 28 | Wife | — | Iowa |
| 29 | Opal A Townsend | 10 | Daughter | — | Iowa |
| 30 | Beatrice P Townsend | 9 | Daughter | — | Iowa |
| 31 | John B Townsend | 7 | Son | — | Iowa |
| 32 | Norman D Townsend | 5 | Son | — | Iowa |
| 33 | Robert S Townsend | 3 | Son | — | Iowa |
| 34 | Alfred W Smith | 35 | Brother in law | Salesman | Iowa |
| 35 | Edith A Smith | 28 | Wife | — | Iowa |
| 36 | Gordon W Smith | 3 | Son | — | Nebraska |
| 37 | Wardell G Smith | 0 | Son | — | Iowa |
| 38 | Joe A Sherbo | 42 | Head | Inspector | Iowa |
| 39 | Elsie L Sherbo | 36 | Wife | — | Iowa |
| 40 | Mary J Sherbo | 16 | Daughter | — | Iowa |
Pedigree Summary
Mary
Gen 1 · 5 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)