MS
Mary Sargent — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Sargent across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Sargent |
| Given Name | Mary C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Theresa Sargent | Spouse | — | 45 | ~1895 |
| Mary Sargent | Daughter | — | 17 | ~1923 |
| Ann Sargent | Daughter | — | 13 | ~1927 |
| Ann Quinn | Other | — | 75 | ~1865 |
| Walter Sargent | Head | — | 45 | ~1895 |
| Helen Sargent | Daughter | — | 5 | ~1935 |
| Thomas Sargent | Son | — | 15 | ~1925 |
| Theresa Sargent | Daughter | — | 8 | ~1932 |
| Louise Sargent | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 7
Middlesex, Massachusetts · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sargent |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 17
Middlesex-County, Massachusetts · implied b. ~1923 — 9 household members
| Surname | Sargent |
| Given Name | Mary C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Massachusetts |
| 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 Sargent across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Sargent
Daughter · 1940 · age 17 · b. ~1923 · Massachusetts
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Sibling
Louise Sargent
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Sargent
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Sargent
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Sargent
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Sargent
Sibling · 1940 · age 13
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01691-00641)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Reed | 60 | Head | Trained Nurse | Massachusetts |
| 2 | Arbee Reed | 34 | Daughter | Store Manager | Massachusetts |
| 3 | Charles Reed | 24 | Son | Store Manager | Massachusetts |
| 4 | Mary Reed | 20 | Daughter | — | Massachusetts |
| 5 | Walter J Sargent | 45 | Head | — | Massachusetts |
| 6 | Theresa R Sargent | 45 | Wife | — | Massachusetts |
| 7 | Mary C Sargent THIS PERSON | 17 | Daughter | — | Massachusetts |
| 8 | Thomas J Sargent | 15 | Son | — | Massachusetts |
| 9 | Ann F Sargent | 13 | Daughter | — | Massachusetts |
| 10 | Louise F Sargent | 11 | Daughter | — | Massachusetts |
| 11 | Theresa R Sargent | 8 | Daughter | — | Massachusetts |
| 12 | Helen Sargent | 5 | Daughter | — | Massachusetts |
| 13 | Ann Quinn | 75 | Mother-in-law | — | Irish Free State |
| 14 | Catherine R Healey | 47 | Head | Bookkeeper | Massachusetts |
| 15 | Dorothy Healey | 23 | Daughter | Waitress | Massachusetts |
| 16 | Robert Healey | 18 | Son | — | Massachusetts |
| 17 | Elizabeth A Chisholm | 48 | Head | School Cook | Massachusetts |
| 18 | Joseph Chisholm | 24 | Son | Clerk | Massachusetts |
| 19 | Phyllis Chisholm | 17 | Daughter | — | Massachusetts |
| 20 | John Chisholm | 12 | Son | — | Massachusetts |
| 21 | Oliver P Bedard | 27 | Head | Wood Heel Fitter | Canada-French |
| 22 | Rebella Bedard | 24 | Wife | — | New Hampshire |
| 23 | Rebella Bedard | 4 | Daughter | — | Massachusetts |
| 24 | Jeanne Bedard | 3 | Daughter | — | Massachusetts |
| 25 | Pantaleon Levasseur | 56 | Head | Millwright Mechanic | Canada-French |
| 26 | Florida R Levasseur | 55 | Wife | — | Canada-French |
| 27 | Gertrude Levasseur | 25 | Daughter | Repairer | Massachusetts |
| 28 | Juliette Levasseur | 22 | Daughter | Packer Of Shoes | Massachusetts |
| 29 | Lillian Levasseur | 17 | Daughter | — | Massachusetts |
| 30 | Charles R Boudreau | 39 | Head | Edge Setter Of Shoe | Massachusetts |
| 31 | Yvonne Boudreau | 42 | Wife | Looper Of Hose | Massachusetts |
| 32 | Charles R Boudreau | 17 | Son | — | Massachusetts |
| 33 | Paul R Mabene | 29 | Head | Receiving Clerk | New Hampshire |
| 34 | Cecile Mabene | 28 | Wife | — | Canada-French |
| 35 | Leonard Mabene | 4 | Son | — | Massachusetts |
| 36 | Rodney Mabene | 1 | Son | — | Massachusetts |
| 37 | George Reardon | 35 | Head | Treer | Massachusetts |
| 38 | Mary R Reardon | 34 | Wife | — | Massachusetts |
| 39 | Eileen Reardon | 8 | Daughter | — | Massachusetts |
| 40 | Joan Reardon | 7 | Daughter | — | Massachusetts |
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)