MG
Mary Graham — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Graham across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents William & Elizabeth — first a spouse (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Graham |
| Given Name | Mary O |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell 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 |
|---|---|---|---|---|
| Maureen Graham | Daughter | — | 1 | ~1939 |
| John Graham | Head | — | 30 | ~1910 |
| Mary Graham | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 3
Middlesex, Massachusetts · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Graham |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
Daughter, age 14
Middlesex, Massachusetts · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Graham |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 25
Middlesex-County, Massachusetts · implied b. ~1915 — 3 household members
| Surname | Graham |
| Given Name | Mary O |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | Hs 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 Graham across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Graham (~0.92 confidence) and mother Elizabeth Graham (~0.92 confidence) and mother Lizzie Graham (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Graham
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Graham
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Lizzie Graham
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Graham
Spouse · 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 — 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-t0627-01694-00512)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Margaret Maloney | 55 | Wife | — | Massachusetts |
| 42 | Charles Curry | 55 | Head | Picker | Massachusetts |
| 43 | Mary O Curry | 52 | Wife | — | Massachusetts |
| 44 | Mary E Doyle | 76 | Mother-in-law | — | Massachusetts |
| 45 | John Graham | 30 | Head | Repairman | Massachusetts |
| 46 | Mary O Graham THIS PERSON | 25 | Wife | — | Massachusetts |
| 47 | Maureen Graham | 1 | Daughter | — | Massachusetts |
| 48 | William Doley | 43 | Head | Bottling | Massachusetts |
| 49 | Ella Doley | 40 | Wife | Waitress | Massachusetts |
| 50 | Helen Doley | 11 | Daughter | — | Massachusetts |
| 51 | William Doley | 6 | Son | — | Massachusetts |
| 52 | Armand Bordeleau | 41 | Head | Salesman | Massachusetts |
| 53 | Elizabeth Bordeleau | 40 | Wife | Clerical | Massachusetts |
| 54 | William Craig | 34 | Head | Roof Sealer | Massachusetts |
| 55 | Nora O Craig | 27 | Wife | — | Canada English |
| 56 | Antonio S Travers | 52 | Head | — | Portugal |
| 57 | Theobald Travers | 24 | Son | Cleaner | Massachusetts |
| 58 | Francis Travers | 21 | Son | Cleaner | Massachusetts |
| 59 | Gilbert Travers | 18 | Son | Cleaner | Massachusetts |
| 60 | Lillian Travers | 11 | Daughter | — | Massachusetts |
| 61 | Patrick J Craig | 50 | Head | Policeman | Massachusetts |
| 62 | Mary E Craig | 53 | Wife | — | Massachusetts |
| 63 | Francis Craig | 23 | Son | Cab Driver | Massachusetts |
| 64 | Dorothy Craig | 20 | Daughter | New Worker | Massachusetts |
| 65 | Marguerite Craig | 18 | Daughter | — | Massachusetts |
| 66 | Annie Craig | 16 | Daughter | — | Massachusetts |
| 67 | James Mclean | 44 | Head | Shoe Worker | Massachusetts |
| 68 | Nora B Mclean | 47 | Wife | — | Irish Free State |
| 69 | Marie Mclean | 21 | Daughter | Stenographer | Massachusetts |
| 70 | Francis Mclean | 18 | Son | — | Massachusetts |
| 71 | Robert Mclean | 15 | Son | — | Massachusetts |
| 72 | Rose O Mclean | 68 | Head | — | Massachusetts |
| 73 | Ida Mclean | 40 | Daughter | Repairing | Massachusetts |
| 74 | Marion Mclean | 38 | Daughter | Inspector | Massachusetts |
| 75 | Patrick Hart | 76 | Head | — | Massachusetts |
| 76 | Margaret Hart | 71 | Wife | — | Irish Free State |
| 77 | Annie Hart | 39 | Daughter | Inspector | Massachusetts |
| 78 | James A Howard | 58 | Head | Plumber | Massachusetts |
| 79 | Catherine C Howard | 53 | Wife | — | Massachusetts |
| 80 | May Howard | 24 | Daughter | Receptionist | Massachusetts |
Related Census Records
Pedigree Summary
Mary
Gen 1 · 3 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)