MC
Mary Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hampden-County, Massachusetts
Our Model Tree links this Mary Clark across the 1920, 1930 and 1940 US Censuses in Hampden-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Harry — first a daughter (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hampden-County, Massachusetts |
| Surname | Clark |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Hampden |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Springfield |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Alice Clark | Daughter | — | 16 | ~1924 |
| Mary Clark | Daughter | — | 20 | ~1920 |
| Mary Clark | Head | — | 47 | ~1893 |
| Mary Mullaly | Other | — | 78 | ~1862 |
| Joseph Clark | Son | — | 14 | ~1926 |
Census Appearances
1920
Hampden, Massachusetts
Daughter, age
Hampden, Massachusetts · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Hampden, Massachusetts
Daughter, age 10
Hampden, Massachusetts · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| 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
Hampden-County, Massachusetts
Daughter, age 20
Hampden-County, Massachusetts · implied b. ~1920 — 5 household members
| Surname | Clark |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Hampden |
| Industry | 0 |
| 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 John Clark (~0.92 confidence) and father Harry Clark (~0.92 confidence) and mother Virginia Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Clark
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Harry Clark
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Virginia Clark
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Clark
Daughter · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Joseph Clark
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Clark
Sibling · 1940 · age 16
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 — Hampden-County, Massachusetts
Open full size
1940 US Federal Census — Hampden-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01710-00275)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary P Clark | 47 | Head | — | Massachusetts |
| 42 | Mary Clark THIS PERSON | 20 | Daughter | — | Massachusetts |
| 43 | Alice Clark | 16 | Daughter | — | Massachusetts |
| 44 | Joseph Clark | 14 | Son | — | Massachusetts |
| 45 | Mary Ann Mullaly | 78 | Mother | — | Massachusetts |
| 46 | Thomas W Grady | 40 | Head | Bookkeeper | Massachusetts |
| 47 | Helen Grady | 39 | Wife | — | Massachusetts |
| 48 | Virginia Grady | 14 | Daughter | — | Massachusetts |
| 49 | Alice Grady | 12 | Daughter | — | Massachusetts |
| 50 | Edward Grady | 10 | Son | — | Massachusetts |
| 51 | William Grady | 8 | Son | — | Massachusetts |
| 52 | Louis Anthony | 51 | Head | Clerk | Massachusetts |
| 53 | Isabelle D Anthony | 51 | Wife | — | Massachusetts |
| 54 | Julia I Mclean | 76 | Mother-in-law | — | Sweden |
| 55 | Lura Mae Wright | 62 | Lodger | Nurse | Massachusetts |
| 56 | George S Levine | 41 | Head | Salesman | New York |
| 57 | Esther Levine | 37 | Wife | — | Russia |
| 58 | Jerome Levine | 16 | Son | — | Connecticut |
| 59 | Seymour Levine | 12 | Son | — | Massachusetts |
| 60 | Morton Levine | 12 | Son | — | Massachusetts |
| 61 | John Muley | 31 | Head | Salesman | Massachusetts |
| 62 | Evelyn Muley | 33 | Wife | — | New York |
| 63 | Mary Jane Muley | 7 | Daughter | — | New York |
| 64 | Patricia Ann Muley | 4 | Daughter | — | Massachusetts |
| 65 | Catherine E Muley | 2 | Daughter | — | Massachusetts |
| 66 | Anthony Ploukey | 44 | Head | Inspector | Vermont |
| 67 | Gladys Ploukey | 37 | Wife | — | Massachusetts |
| 68 | William Ploukey | 13 | Son | — | Massachusetts |
| 69 | Robert Ploukey | 10 | Son | — | Massachusetts |
| 70 | Marie Ploukey | 5 | Daughter | — | Massachusetts |
| 71 | Joseph Brinkman | 33 | Cousin | Lithographer | Rhode Island |
| 72 | Fred Wells | 46 | Head | Timekeeper | Massachusetts |
| 73 | Alma Wells | 49 | Wife | — | Massachusetts |
| 74 | Charles R Wells | 79 | Father | — | Tennessee |
| 75 | Fannie Morey | 66 | Head | — | Vermont |
| 76 | Ralph P Morey | 39 | Son | Paymaster | Vermont |
| 77 | Dwight E Phillips | 29 | Head | Underwriter | Massachusetts |
| 78 | Mae Phillips | 29 | Wife | — | Massachusetts |
| 79 | Norma J Phillips | 6 | Daughter | — | Massachusetts |
| 80 | Judith A Phillips | 0 | Daughter | — | Massachusetts |
Pedigree Summary
Mary + 2 siblings
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)