MC
Mary Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Plymouth-County, Massachusetts
Our Model Tree links this Mary Clark across the 1920, 1930 and 1940 US Censuses in Plymouth-County, Massachusetts (XGBoost, ~Confirmed), with identified parents James & James — first a daughter (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Plymouth-County, Massachusetts |
| Surname | Clark |
| Given Name | Mary R. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brockton City |
| 1935 Residence (County) | Plymouth |
| Additional Details | |
| Occupation | Carder Operator |
| Industry | H.O.L.C. |
| Class of Worker | GW |
| Hours Worked | 28 |
| Income (1939) | 1260 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Carder Operator |
| Township / Ward | Brockton City |
| Est. Birth Year | ~1915 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Clark | Daughter | — | 25 | ~1915 |
| Lenore Clark | Other | — | 51 | ~1889 |
| Rosella Clark | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Plymouth, Massachusetts
Daughter, age 5
Plymouth, Massachusetts · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Plymouth, Massachusetts
Daughter, age 15
Plymouth, Massachusetts · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Plymouth-County, Massachusetts
Daughter, age 25
Plymouth-County, Massachusetts · implied b. ~1915 — 3 household members
| Surname | Clark |
| Given Name | Mary R. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brockton City |
| 1935 Residence (County) | Plymouth |
| Occupation | Carder Operator |
| Industry | H.O.L.C. |
| Class of Worker | GW |
| Hours Worked | 28 |
| Income (1939) | 1260 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Clark (~0.92 confidence) and father James Clark (~0.92 confidence) and mother Rosella Clark (~0.92 confidence) and mother Rosella Clark (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Clark
b. ~1884
Source father
● Household
· direct · ~0.92
Father
James Clark
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Rosella Clark
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Rosella Clark
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Clark
Daughter · 1940 · age 25 · b. ~1915 · Massachusetts
★ 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 — Plymouth-County, Massachusetts
Open full size
1940 US Federal Census — Plymouth-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01636-00608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rosella Clark | 58 | Wife | — | Massachusetts |
| 42 | Mary R. Clark THIS PERSON | 25 | Daughter | Carder Operator | Massachusetts |
| 43 | Lenore M. Clark | 51 | Sister | Presser | Massachusetts |
| 44 | Wilfred Poudrier | 38 | Head | Foreman | Massachusetts |
| 45 | Una Poudrier | 40 | Wife | — | Massachusetts |
| 46 | Robert Poudrier | 12 | Son | — | Massachusetts |
| 47 | Claire Poudrier | 10 | Daughter | — | Massachusetts |
| 48 | Doris Poudrier | 8 | Daughter | — | Massachusetts |
| 49 | Joseph A. Forest | 49 | Head | Heeler | Canada-French |
| 50 | Beula Forest | 47 | Wife | Mender | Massachusetts |
| 51 | Norman Forest | 18 | Son | C.C.C. | Massachusetts |
| 52 | Robert L. Charland | 45 | Head | Treer | Canada-French |
| 53 | Mary E. Charland | 45 | Wife | Stitcher | Massachusetts |
| 54 | Robert Charland | 17 | Son | — | Massachusetts |
| 55 | Robert Charland | 17 | Son | — | Massachusetts |
| 56 | — | None | — | — | — |
| 57 | Margaret Doherty | 63 | Head | — | Massachusetts |
| 58 | Mary H. Mcgowan | 33 | Daughter | — | Massachusetts |
| 59 | Wm. J. Mcgowan | 31 | Son-in-law | Tractor Operator | Massachusetts |
| 60 | Mary H. Mcgowan | 7 | Daughter | — | Massachusetts |
| 61 | Roger Mcgowan | 5 | Son | — | Massachusetts |
| 62 | William Doherty | 41 | Head | Office Work | Massachusetts |
| 63 | Grace Doherty | 41 | Wife | — | Massachusetts |
| 64 | William Doherty | 12 | Son | — | Massachusetts |
| 65 | Paul Doherty | 10 | Son | — | Massachusetts |
| 66 | John H. Doherty | 26 | Head | Truck Driver | Massachusetts |
| 67 | Alma Doherty | 21 | Wife | — | Massachusetts |
| 68 | Theresa Mullins | 90 | Head | — | Irish Free State |
| 69 | Ellen T. Mullins | 58 | Daughter | — | Massachusetts |
| 70 | Eugenia Ryan | 66 | Head | Inspector | Canada-French |
| 71 | Joseph Murphy | 45 | Son-in-law | Salesman | Massachusetts |
| 72 | Evelyn Murphy | 42 | Daughter | Podiatrist | Massachusetts |
| 73 | Eugenia Murphy | 18 | Daughter | Hairdresser | Massachusetts |
| 74 | Joseph W. Murphy | 16 | Son | — | Massachusetts |
| 75 | Wilfred White | 65 | Head | — | Massachusetts |
| 76 | Bridget White | 62 | Wife | — | Massachusetts |
| 77 | William E. Beers | 61 | Head | Fireman | Pennsylvania |
| 78 | Margaret E. Beers | 58 | Wife | — | Massachusetts |
| 79 | John J. Beers | 29 | Son | Laborer | Massachusetts |
| 80 | Theophill Chasse | 50 | Head | Finisher | Massachusetts |
Pedigree Summary
Mary
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)