MD
Mary Dennis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · York-County, Pennsylvania
Our Model Tree links this Mary Dennis across the 1930 and 1940 US Censuses in York-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 7-person household.
Age 17
b. ~1923
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | York-County, Pennsylvania |
| Surname | Dennis |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | West York |
| 1935 Residence (County) | York |
| Additional Details | |
| Occupation | Housework |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 50 |
| Highest Grade | No 5 |
| 1935 Residence | Penna. |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Housework |
| Township / Ward | West York |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Curvin Dennis | Son | — | 15 | ~1925 |
| Bernadette Dennis | Spouse | — | 40 | ~1900 |
| Mary Dennis | Daughter | — | 17 | ~1923 |
| Russell Dennis | Son | — | ~1940 | |
| Kenneth Dennis | Son | — | 7 | ~1933 |
| Lloyd Dennis | Head | — | 41 | ~1899 |
| Betty Dennis | Daughter | — | 14 | ~1926 |
Census Appearances
1930
York, Pennsylvania
Daughter, age 7
York, Pennsylvania · implied b. ~1923 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dennis |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
York-County, Pennsylvania
Daughter, age 17
York-County, Pennsylvania · implied b. ~1923 — 7 household members
| Surname | Dennis |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | West York |
| 1935 Residence (County) | York |
| Occupation | Housework |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 50 |
| Highest Grade | No 5 |
| 1935 Residence | Penna. |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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
Daughter · 1940 · age 17 · b. ~1923 · Pennsylvania
★ You are viewing this record
Sibling
Curvin Dennis
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Dennis
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Dennis
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Dennis
Sibling · 1940 · age 14
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 — York-County, Pennsylvania
Open full size
1940 US Federal Census — York-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03644-00718)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen R. Richards | 25 | Wife | — | Pennsylvania |
| 2 | John P. Richards | 7 | Son | — | Pennsylvania |
| 3 | Barbara A. Richards | 4 | Daughter | — | Pennsylvania |
| 4 | Lewis Hoffman | 86 | Head | — | Pennsylvania |
| 5 | John H. Leas | 73 | Head | Laborer | Pennsylvania |
| 6 | Elizabeth L. Leas | 61 | Wife | — | Pennsylvania |
| 7 | Edward J. Ward | 19 | Step Son | — | Pennsylvania |
| 8 | Chas. F. Crawmer | 71 | Head | Laborer | Maryland |
| 9 | Cordelia Crawmer | 60 | Wife | — | Maryland |
| 10 | Son Chas. P. Jr. | None | M | Retail Grocery Store | — |
| 11 | Lloyd L. Dennis | 41 | Head | Laborer | Pennsylvania |
| 12 | Bernadette Dennis | 40 | Wife | — | Pennsylvania |
| 13 | Mary L. Dennis THIS PERSON | 17 | Daughter | Housework | Pennsylvania |
| 14 | Curvin H. Dennis | 15 | Son | — | Pennsylvania |
| 15 | Betty M. Dennis | 14 | Daughter | — | Pennsylvania |
| 16 | Kenneth E. Dennis | 7 | Son | — | Pennsylvania |
| 17 | Russell L. Dennis | 0 | Son | — | Pennsylvania |
| 18 | Claude S. Koller | 37 | Head | Embalmer | Pennsylvania |
| 19 | Florence L. Koller | 32 | Wife | — | Pennsylvania |
| 20 | Patricia E. Koller | 9 | Daughter | — | Pennsylvania |
| 21 | Claude S. Jr. Koller | 5 | Son | — | Pennsylvania |
| 22 | Carolyn M. Koller | 4 | Daughter | — | Pennsylvania |
| 23 | Rudolph Gillespie | 26 | Head | Laborer | West Virginia |
| 24 | Esther M. Gillespie | 22 | Wife | — | Pennsylvania |
| 25 | Ronald E. Gillespie | 3 | Son | — | Pennsylvania |
| 26 | Rudolph Jr. Gillespie | 0 | Son | — | Pennsylvania |
| 27 | Birdie Recard | 34 | Sister | Laborer | West Virginia |
| 28 | Chloie Byrne | 36 | Sister | Housework | West Virginia |
| 29 | Hugh J. Byrne | 12 | Nephew | — | West Virginia |
| 30 | Georgia L. Hosey | 18 | Niece | Waitress | West Virginia |
| 31 | Charles H. Allison | 51 | Head | Laborer | Pennsylvania |
| 32 | Elizabeth E. Allison | 18 | Daughter | — | Pennsylvania |
| 33 | William H. Allison | 17 | Son | — | Pennsylvania |
| 34 | Ralph S. Spangler | 36 | Son in law | Electrician | Pennsylvania |
| 35 | A. Romaine Spangler | 26 | Daughter | — | Pennsylvania |
| 36 | C. Leroy Shepps | 37 | Head | Hand Compositor | Maryland |
| 37 | Elsie V. Shepps | 40 | Wife | — | Maryland |
| 38 | Rose Ann Trouse | 5 | Adopted Child | — | Pennsylvania |
| 39 | Wm. A. Greiman | 31 | Head | Pool Clerk | Pennsylvania |
| 40 | Lillian T. Greiman | 29 | Wife | — | Pennsylvania |
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)