MD
Mary Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lamar-County, Texas
Our Model Tree links this Mary Dempsey across the 1930 and 1940 US Censuses in Lamar-County, Texas (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 12-person household.
Age 17
b. ~1923
Female
Daughter
Born: Texas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lamar-County, Texas |
| Surname | Dempsey |
| Given Name | Mary H. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Paris City |
| 1935 Residence (County) | Lamar |
| Additional Details | |
| Industry | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Township / Ward | Paris City |
| Est. Birth Year | ~1923 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Dempsey | Daughter | — | 17 | ~1923 |
| Frances Dempsey | Daughter | — | 11 | ~1929 |
| Jack Dempsey | Son | — | 21 | ~1919 |
| Juanita Dempsey | Daughter | — | 5 | ~1935 |
| Jimmy Dempsey | Son | — | 5 | ~1935 |
| Willie Dempsey | Spouse | — | 44 | ~1896 |
| Leonard Dempsey | Son | — | 23 | ~1917 |
| Genevieve Dempsey | Daughter | — | 19 | ~1921 |
| Jas Dempsey | Son | — | 15 | ~1925 |
| Jas Dempsey | Head | — | 49 | ~1891 |
| Dorothy Dempsey | Daughter | — | 7 | ~1933 |
| Iona Dempsey | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Lamar, Texas
Daughter, age 5
Lamar, Texas · implied b. ~1925 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | Mary Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Lamar-County, Texas
Daughter, age 17
Lamar-County, Texas · implied b. ~1923 — 12 household members
| Surname | Dempsey |
| Given Name | Mary H. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Paris City |
| 1935 Residence (County) | Lamar |
| Industry | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 Dempsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dempsey
Daughter · 1940 · age 17 · b. ~1923 · Texas
★ You are viewing this record
Sibling
Leonard Dempsey
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Dempsey
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Dempsey
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Juanita Dempsey
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jas Dempsey
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Dempsey
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jimmy Dempsey
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Iona Dempsey
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Dempsey
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Lamar-County, Texas
Open full size
1940 US Federal Census — Lamar-County, Texas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04089-00382)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Nellie Sherry | 9 | Son | — | Texas |
| 42 | Lillie Mcclureton | 67 | Head | — | Texas |
| 43 | Oliver Mcfadden | 50 | Son-in-law | Manager | Texas |
| 44 | May Mcfadden | 44 | Daughter | Clerk Typist | Texas |
| 45 | Jas. J. Dempsey | 49 | Head | Barber | Texas |
| 46 | Willie G. Dempsey | 44 | Wife | — | Texas |
| 47 | Leonard J. Dempsey | 23 | Son | Truck Driver | Texas |
| 48 | Jack H. Dempsey | 21 | Son | Truck Driver | Texas |
| 49 | Genevieve A. Dempsey | 19 | Daughter | — | Texas |
| 50 | Mary H. Dempsey THIS PERSON | 17 | Daughter | — | Texas |
| 51 | Jas. Jr. Dempsey | 15 | Son | — | Texas |
| 52 | Frances Dempsey | 11 | Daughter | — | Texas |
| 53 | Iona B. Dempsey | 9 | Daughter | — | Texas |
| 54 | Dorothy J. Dempsey | 7 | Daughter | — | Texas |
| 55 | Jimmy L. Dempsey | 5 | Son | — | Texas |
| 56 | Juanita J. Dempsey | 5 | Daughter | — | Texas |
| 57 | Walton B. Marshall | 45 | Head | Linotype Operator | Texas |
| 58 | Sue M. Marshall | 42 | Wife | — | Texas |
| 59 | Florence Marshall | 6 | Daughter | — | Texas |
| 60 | Albert S. King | 47 | Head | Bill Poster | Georgia |
| 61 | Nona R. King | 47 | Wife | — | Arkansas |
| 62 | William S. King | 24 | Son | Warehouseman | Texas |
| 63 | Ray L. King | 18 | Son | — | Texas |
| 64 | Jack King | 13 | Son | — | Texas |
| 65 | Mollie Clark | 75 | Mother-in-law | — | Mississippi |
| 66 | Eula C. Porter | 71 | Head | Physician | Mississippi |
| 67 | Ola Porter | 70 | Sister | — | Mississippi |
| 68 | Clarence M. Everett | 49 | Head | Farmer | Cattle Dealer | Texas |
| 69 | Lollie D. Everett | 49 | Wife | — | Texas |
| 70 | Christine M. Everett | 21 | Daughter | — | Texas |
| 71 | John G. Gardner | 58 | Head | Carpenter | Texas |
| 72 | Edna M. Gardner | 36 | Wife | — | Texas |
| 73 | Elza L. Bailey | 31 | Head | Floor Finisher | Texas |
| 74 | Goldie C. Bailey | 30 | Wife | — | Texas |
| 75 | Arnoldia Bailey | 6 | Daughter | — | Texas |
| 76 | Dewey C. Sturdivant | 36 | Head | Farmer | Texas |
| 77 | Ethel Sturdivant | 32 | Wife | — | Texas |
| 78 | Frances P. Sturdivant | 11 | Daughter | — | Texas |
| 79 | Homer Thomas | 25 | Head | Laborer | Texas |
| 80 | Mary Thomas | 18 | Wife | — | Texas |
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)