MH
Mary Hess — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mahoning-County, Ohio
Our Model Tree links this Mary Hess across the 1930 and 1940 US Censuses in Mahoning-County, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1904), then head of a 8-person household.
Age 36
b. ~1904
Female
Spouse
Born: Poland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mahoning-County, Ohio |
| Surname | Hess |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Youngstown City |
| 1935 Residence (County) | Mahoning |
| Naturalization Status | First papers filed |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Township / Ward | Youngstown City |
| Est. Birth Year | ~1904 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Theresa Hess | Daughter | — | 2 | ~1938 |
| Louise Hess | Daughter | — | 5 | ~1935 |
| Dolores Hess | Daughter | — | 10 | ~1930 |
| Phillip Hess | Head | — | 39 | ~1901 |
| John Hess | Son | — | 14 | ~1926 |
| Edward Hess | Son | — | 5 | ~1935 |
| Thomas Hess | Son | — | 12 | ~1928 |
| Mary Hess | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Mahoning, Ohio
Daughter, age 27
Mahoning, Ohio · implied b. ~1903 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Heiss |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Poland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Age at First Marriage | 21 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Polish |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1940
Mahoning-County, Ohio
Spouse, age 36
Mahoning-County, Ohio · implied b. ~1904 — 8 household members
| Surname | Hess |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Youngstown City |
| 1935 Residence (County) | Mahoning |
| Naturalization Status | First papers filed |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
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 Hess across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hess
Spouse · 1940 · age 36 · b. ~1904 · Ohio
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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 — Mahoning-County, Ohio
Open full size
1940 US Federal Census — Mahoning-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03270-00141)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret D. Garaar | 25 | Daughter | Seamstress | Ohio |
| 2 | Mary B. Garaar | 23 | Daughter | Waitress | Ohio |
| 3 | Helen M. Garaar | 19 | Daughter | House Worker | Ohio |
| 4 | Elizabeth Deak | 42 | Head | — | Hungary |
| 5 | John Deak | 19 | son | Laborer | Ohio |
| 6 | Frank Deak | 17 | son | New Worker | Ohio |
| 7 | Irene Deak | 15 | daughter | — | Ohio |
| 8 | Margaret Deak | 14 | daughter | — | Ohio |
| 9 | Stevie Deak | 9 | son | — | Ohio |
| 10 | Joseph Deak | 6 | son | — | Ohio |
| 11 | Betty J. Deak | 5 | daughter | — | Ohio |
| 12 | George Kondas | 51 | Head | Big Laborer | Hungary |
| 13 | Mike Kondas | 25 | son | Steam Crane | Ohio |
| 14 | Elizabeth Kondas | 17 | daughter | House Worker | Ohio |
| 15 | Helen Kondas | 13 | daughter | — | Ohio |
| 16 | Phillip Hess | 39 | Head | Laborer | Poland |
| 17 | Mary Hess THIS PERSON | 36 | Wife | — | Poland |
| 18 | John R. Hess | 14 | son | — | Ohio |
| 19 | Thomas M. Hess | 12 | son | — | Ohio |
| 20 | Dolores M. Hess | 10 | daughter | — | Ohio |
| 21 | Edward P. Hess | 5 | son | — | Ohio |
| 22 | Louise A. Hess | 5 | daughter | — | Ohio |
| 23 | Theresa M. Hess | 2 | daughter | — | Ohio |
| 24 | Joseph P. Ondash | 51 | Head | — | Czechoslovakia |
| 25 | Francis M. Ondash | 48 | wife | — | Pennsylvania |
| 26 | Paul J. Ondash | 18 | son | New Worker | Ohio |
| 27 | Helen B. Ondash | 14 | daughter | — | Ohio |
| 28 | Joseph Ondash | 12 | son | — | Ohio |
| 29 | John Ondash | 10 | son | — | Ohio |
| 30 | Alex Barta | 46 | head | Butcher And Sales Clerk | Hungary |
| 31 | Mollie E. Barta | 24 | wife | Sales Clerk | Ohio |
| 32 | Sue I. Barta | 21 | sister in law | Sales Clerk | Ohio |
| 33 | Peter Mekita | 62 | Head | Laborer | Czechoslovakia |
| 34 | Helen Mekita | 59 | wife | — | Czechoslovakia |
| 35 | Helen Mekita | 28 | daughter | Cashing | Pennsylvania |
| 36 | Joseph T. Horvath | 33 | Son-in-Law | Coke Wheeler | Ohio |
| 37 | Ann Horvath | 31 | daughter | — | Pennsylvania |
| 38 | Thomas Horvath | 12 | son | — | Ohio |
| 39 | William G. Pupa | 52 | Head | Millwright | Austria |
| 40 | Mary Pupa | 44 | wife | — | Austria |
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)