MH
Mary Hart — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lorain-County, Ohio
Our Model Tree links this Mary Hart across the 1920, 1930 and 1940 US Censuses in Lorain-County, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1870), then head of a 5-person household.
Age 70
b. ~1870
Female
Spouse
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lorain-County, Ohio |
| Surname | Hart |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Elyria city |
| 1935 Residence (County) | Lorain |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Elyria City |
| Est. Birth Year | ~1870 |
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 |
|---|---|---|---|---|
| Irene Hart | Daughter | — | 28 | ~1912 |
| Viola Hart | Daughter | — | 35 | ~1905 |
| Zita Hart | Daughter | — | 33 | ~1907 |
| George Hart | Head | — | 75 | ~1865 |
| Mary Hart | Spouse | — | 70 | ~1870 |
Census Appearances
1920
Lorain, Ohio
Spouse, age 52
Lorain, Ohio · implied b. ~1868 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Un |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Eng |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Lorain, Ohio
Other, age 62
Lorain, Ohio · implied b. ~1868 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | wife-H |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Alien |
| Year of Immigration | 1868 |
| Age at First Marriage | 23 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Lorain-County, Ohio
Spouse, age 70
Lorain-County, Ohio · implied b. ~1870 — 5 household members
| Surname | Hart |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Elyria city |
| 1935 Residence (County) | Lorain |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Hart
Spouse · 1940 · age 70 · b. ~1870 · Ohio
★ 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 — Lorain-County, Ohio
Open full size
1940 US Federal Census — Lorain-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03103-00455)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alex Zeko | 8 | Son | — | Ohio |
| 2 | George Hart | 75 | Head | — | England |
| 3 | Mary L. Hart THIS PERSON | 70 | Wife | — | England |
| 4 | Viola Hart | 35 | Daughter | Stenographer | Pennsylvania |
| 5 | Zita Hart | 33 | Daughter | Rate Clerk | Pennsylvania |
| 6 | Irene Hart | 28 | Daughter | House Work | Ohio |
| 7 | Adelaide Clement | 65 | Head | — | Iowa |
| 8 | Bernice Clement | 34 | Daughter | Machine Operator | Ohio |
| 9 | Russell Clement | 34 | Son-in-law | Water Tester | Ohio |
| 10 | James M. Carman | 35 | Head | Core Maker | Ohio |
| 11 | Alberta Carman | 31 | Wife | — | Ohio |
| 12 | Alberta E. Carman | 7 | Daughter | — | Pennsylvania |
| 13 | Robert E. Carman | 5 | Son | — | Pennsylvania |
| 14 | Donna Mae Carman | 0 | Daughter | — | Ohio |
| 15 | William Butterman | 43 | Head | Erector | Ohio |
| 16 | Mae Butterman | 40 | Wife | — | Ohio |
| 17 | Wallace Butterman | 19 | Son | Core Maker | Ohio |
| 18 | Ruby Butterman | 18 | Daughter | — | Ohio |
| 19 | Joseph J. Mulroy | 69 | Head | Millwright | Missouri |
| 20 | Bertha Marie Mulroy | 66 | Wife | — | Michigan |
| 21 | Shirley Ann Mulroy | 10 | Grand-dau | — | Ohio |
| 22 | Robert B. Allen | 29 | Head | Inspector | Ohio |
| 23 | Gertrude Allen | 30 | Wife | Librarian | Connecticut |
| 24 | David F. Vreeland | 25 | Head | Laborer | Pennsylvania |
| 25 | Alice Y. Vreeland | 23 | Wife | — | Pennsylvania |
| 26 | Louis Martin | 66 | Head | Watchman | Hungary |
| 27 | Rose Martin | 57 | Wife | — | Hungary |
| 28 | George Martin | 20 | Son | Attendant | Ohio |
| 29 | Mary Martin | 17 | Daughter | Waitress | Ohio |
| 30 | Charles Martin | 14 | Son | — | Ohio |
| 31 | John J. Gerhart | 56 | Head | Moulder | Ohio |
| 32 | Mary Gerhart | 57 | Wife | — | Ohio |
| 33 | Eugene Gerhart | 33 | Son | Laborer | Ohio |
| 34 | Robert Gerhart | 21 | Son | Clerk | Ohio |
| 35 | Charles A. Tite | 63 | Head | Meat Market | Ohio |
| 36 | Mayme C. Tite | 60 | Wife | — | Ohio |
| 37 | Max E. Noake | 45 | Head | Laborer | Russia |
| 38 | Josephine Noake | 35 | Wife | — | Ohio |
| 39 | Eugene E. Noake | 19 | Son | Laborer | Ohio |
| 40 | Gregory G. Noake | 14 | Son | — | Ohio |
Related Census Records
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)