MD
Mary Dennis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Dennis across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 7-person household.
Age 53
b. ~1887
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Dennis |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1887 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Dennis | Head | — | 53 | ~1887 |
| Carol Dennis | Son | — | 29 | ~1911 |
| Harry Dennis | Son | — | 27 | ~1913 |
| Mary Dennis | Spouse | — | 53 | ~1887 |
| Florence Dennis | Daughter | — | 31 | ~1909 |
| Lawrence Dennis | Son | — | 23 | ~1917 |
| Donald Dennis | Son | — | 22 | ~1918 |
Census Appearances
1930
Polk, Iowa
Other, age 43
Polk, Iowa · implied b. ~1887 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dennis |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Spouse, age 53
Polk-County, Iowa · implied b. ~1887 — 7 household members
| Surname | Dennis |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| 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 Dennis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dennis
Spouse · 1940 · age 53 · b. ~1887 · 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-t0627-01196-00162)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rose Comito | 31 | wife | Cook | Italy |
| 2 | Robert Comito | 10 | son | — | Iowa |
| 3 | William Comito | 8 | son | — | Iowa |
| 4 | Richard Comito | 1 | son | — | Iowa |
| 5 | Walton Bulow | 34 | head | Salesman | Iowa |
| 6 | Anna Bulow | 38 | wife | Net Pads | Iowa |
| 7 | Robert Bulow | 9 | son | — | California |
| 8 | Richard Bulow | 3 | son | — | Iowa |
| 9 | George Bulow | 1 | son | — | Iowa |
| 10 | John Mcilhon | 54 | head | Stationary Engineer | Iowa |
| 11 | Bea F Mcilhon | 43 | wife | Teacher | Iowa |
| 12 | Jack Mcilhon | 17 | son | — | Iowa |
| 13 | Daniel Mcilhon | 16 | son | Laborer | Iowa |
| 14 | Mary Ethel Mcilhon | 15 | daughter | — | Iowa |
| 15 | Patrick Mcilhon | 14 | son | — | Iowa |
| 16 | James Mcilhon | 8 | son | — | Iowa |
| 17 | Russell Box | 27 | head | Stock Clerk | Iowa |
| 18 | Luella Box | 24 | wife | — | Iowa |
| 19 | Richard Box | 4 | son | — | Iowa |
| 20 | Mary Alice Meeks | 20 | lodger | Beauty Operator | Iowa |
| 21 | Loren S Morrow | 46 | head | Painter | Iowa |
| 22 | Anna Morrow | 69 | mother | — | Iowa |
| 23 | James Millittes | 5 | nephew | — | Iowa |
| 24 | Charles W Rogers | 22 | head | Custodian | South Dakota |
| 25 | Ila Rogers | 22 | wife | — | Iowa |
| 26 | Harry G Rogers | 73 | father | — | Iowa |
| 27 | Electa Rogers | 65 | mother | — | Iowa |
| 28 | William Dennis | 53 | head | Miner | Iowa |
| 29 | Mary Dennis THIS PERSON | 53 | wife | — | Iowa |
| 30 | Florence Dennis | 31 | daughter | Checker | Iowa |
| 31 | Carol Dennis | 29 | son | Route Clerk | Iowa |
| 32 | Harry Dennis | 27 | son | Machinist | Iowa |
| 33 | Lawrence Dennis | 23 | son | Cement Work | Iowa |
| 34 | Donald Dennis | 22 | son | — | Iowa |
| 35 | John Hutchinson | 28 | head | Service Man | Iowa |
| 36 | Ruby Hutchinson | 27 | wife | — | Iowa |
| 37 | Charles Hutchinson | 8 | son | — | Iowa |
| 38 | John W Hutchinson | 4 | son | — | Iowa |
| 39 | Edward Spray | 21 | head | Yard Man | Iowa |
| 40 | Alma Spray | 21 | wife | — | Iowa |
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)