MT
Mary Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this Mary Thompson across the 1920, 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Thomas & Forrest — first a daughter (b.~1917), then head of a 8-person household.
Age 23
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Thompson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Worcester |
| Additional Details | |
| Occupation | Same house |
| Industry | 48 |
| Class of Worker | Nurse |
| Highest Grade | H-4 |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Same House |
| Township / Ward | Worcester City |
| Est. Birth Year | ~1917 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Bernice Thompson | Daughter | — | 20 | ~1920 |
| Mary Thompson | Daughter | — | 23 | ~1917 |
| Rita Thompson | Daughter | — | 22 | ~1918 |
| Barbara Thompson | Daughter | — | 18 | ~1922 |
| Forrest Thompson | Head | — | 47 | ~1893 |
| Fred Holmes | Other | — | 39 | ~1901 |
| Forrest Thompson | Son | — | 13 | ~1927 |
| Margaret Thompson | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Worcester, Massachusetts
Daughter, age 3
Worcester, Massachusetts · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Worcester, Massachusetts
Daughter, age 13
Worcester, Massachusetts · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| 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
Worcester-County, Massachusetts
Daughter, age 23
Worcester-County, Massachusetts · implied b. ~1917 — 8 household members
| Surname | Thompson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Worcester |
| Occupation | Same house |
| Industry | 48 |
| Class of Worker | Nurse |
| Highest Grade | H-4 |
| 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 Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Thompson (~0.92 confidence) and father Forrest Thompson (~0.92 confidence) and mother Anastasia Thompson (~0.92 confidence) and mother Margaret Thompson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Thompson
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Forrest Thompson
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Anastasia Thompson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Margaret Thompson
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Thompson
Daughter · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Rita Thompson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Thompson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Forrest Thompson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Thompson
Sibling · 1940 · age 20
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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01716-00170)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Albert Jr Giddings | 4 | Son | Same Place | Massachusetts |
| 2 | Irene L Mccartain | 35 | Head | Same Place | Massachusetts |
| 3 | Norman P Brennan | 37 | Head | Same Place | Massachusetts |
| 4 | Hayella R Brennan | 35 | Wife | Same Place | Massachusetts |
| 5 | Norman P Brennan | 9 | Son | Same Place | Massachusetts |
| 6 | Robert Brennan | 2 | Son | Same Place | Massachusetts |
| 7 | Elizabeth Sweeney | 76 | Head | Same House | Massachusetts |
| 8 | Lester Sweeney | 44 | Son | Same House | Massachusetts |
| 9 | Jacqueline Sweeney | 18 | Grandchild | Same House | Massachusetts |
| 10 | Barbara Sweeney | 16 | Grandchild | Same House | Massachusetts |
| 11 | William Sweeney | 14 | Grandchild | Same House | Massachusetts |
| 12 | Minnie Deware | 60 | Head | Same House | Massachusetts |
| 13 | Delia Deware | 62 | Sister | Same House | Massachusetts |
| 14 | Forrest Thompson | 47 | Head | Same House | Massachusetts |
| 15 | Margaret Thompson | 51 | Wife | Same House | Massachusetts |
| 16 | Mary Thompson THIS PERSON | 23 | Daughter | Same House | Massachusetts |
| 17 | Rita Thompson | 22 | Daughter | Same House | Massachusetts |
| 18 | Bernice Thompson | 20 | Daughter | Same House | Massachusetts |
| 19 | Barbara Thompson | 18 | Daughter | Same House | Massachusetts |
| 20 | Forrest Jr Thompson | 13 | Son | Same House | Massachusetts |
| 21 | Fred Holmes | 39 | Boarder | Same Place | Massachusetts |
| 22 | — | None | — | — | — |
| 23 | Alfred Chevron | 41 | Head | Same Place | New Hampshire |
| 24 | Lorette Chevron | 37 | Wife | Same Place | New Hampshire |
| 25 | Philip Chevron | 9 | Son | Same Place | Massachusetts |
| 26 | Constance Chevron | 8 | Daughter | Same Place | Massachusetts |
| 27 | Richard Chevron | 6 | Son | Same Place | Massachusetts |
| 28 | William J Brady | 55 | Head | Same Place | Connecticut |
| 29 | Lena Brady | 51 | Wife | Same Place | Massachusetts |
| 30 | Loretta Brady | 28 | Daughter | Same Place | Massachusetts |
| 31 | Marie C Brady | 23 | Daughter | Same Place | Massachusetts |
| 32 | — | None | — | — | — |
| 33 | Allen Jordan | 54 | Head | Same Place | Massachusetts |
| 34 | Lena Jordan | 41 | Wife | Same Place | Massachusetts |
| 35 | Al John Jordan | 10 | Son | Same Place | Massachusetts |
| 36 | Allen Brown | 15 | Son | Same Place | Massachusetts |
| 37 | Joan Jordan | 2 | Daughter | Same Place | Massachusetts |
| 38 | Gail Jordan | 1 | Daughter | Same Place | Massachusetts |
| 39 | Herbert Burnor | 46 | Head | Same House | Massachusetts |
| 40 | Ruth Burnor | 43 | Wife | Same House | Massachusetts |
Related Census Records
Pedigree Summary
Mary + 4 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)