MC
Mary Carroll — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Carroll across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 5-person household.
Age 45
b. ~1895
Female
Spouse
Born: Mass
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Carroll |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Mass |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
| Township / Ward | Boston City |
| Est. Birth Year | ~1895 |
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 |
|---|---|---|---|---|
| Mary Carroll | Daughter | — | 16 | ~1924 |
| Ann Carroll | Daughter | — | 8 | ~1932 |
| William Carroll | Head | — | 45 | ~1895 |
| William Carroll | Son | — | 10 | ~1930 |
| Mary Carroll | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Suffolk, Massachusetts
Spouse, age 24
Suffolk, Massachusetts · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Mass |
| Father's Birthplace | Mass |
| Mother's Birthplace | Mass |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
1930
Suffolk, Massachusetts
Spouse, age 35
Suffolk, Massachusetts · implied b. ~1895 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Mass |
| Age at First Marriage | 31 |
| Father's Birthplace | Mass |
| Mother's Birthplace | Mass |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
1940
Suffolk-County, Massachusetts
Spouse, age 45
Suffolk-County, Massachusetts · implied b. ~1895 — 5 household members
| Surname | Carroll |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Mass |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
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 Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Carroll
Spouse · 1940 · age 45 · b. ~1895 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01678-00048)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Hugo M Duvet | 2 | Son | — | Mass |
| 42 | Arthur A Duvet | 1 | Son | — | Mass |
| 43 | Herbert J Flaherty | 43 | Head | Collector | Mass |
| 44 | Ida M Flaherty | 42 | Wife | — | Mass |
| 45 | Herbert J Flaherty | 15 | Son | — | Mass |
| 46 | William A Flaherty | 12 | Son | — | Mass |
| 47 | Joan V Flaherty | 10 | Daughter | — | Mass |
| 48 | Bernard L Thatcher | 50 | Head | Letter Carrier | Mass |
| 49 | Mary M Thatcher | 42 | Wife | — | Mass |
| 50 | Bernice L Thatcher | 15 | Daughter | — | Mass |
| 51 | Eleanor F Thatcher | 13 | Daughter | — | Mass |
| 52 | Donald R Thatcher | 9 | Son | — | Mass |
| 53 | Margaret L Thatcher | 6 | Daughter | — | Mass |
| 54 | Mary Thatcher | 2 | Daughter | — | Mass |
| 55 | Harry De Soto | 54 | Head | Traveler | Mass |
| 56 | Bessie B De Soto | 51 | Wife | — | New York |
| 57 | Robert P De Soto | 25 | Son | — | Mass |
| 58 | William F Carroll | 45 | Head | Truck Driver | Mass |
| 59 | Mary E Carroll THIS PERSON | 45 | Wife | — | Mass |
| 60 | Mary L Carroll | 16 | Daughter | — | Mass |
| 61 | William F Carroll | 10 | Son | — | Mass |
| 62 | Ann J Carroll | 8 | Daughter | — | Mass |
| 63 | — | None | — | — | — |
| 64 | James J Rowland | 26 | Head | Machine Operator | Mass |
| 65 | Margaret E Rowland | 27 | Wife | Bookkeeper | Canada |
| 66 | Mary C Rowland | 2 | Daughter | — | Mass |
| 67 | Edward J Feeney | 59 | Head | Shipper | Eire |
| 68 | Mary A Feeney | 62 | Wife | — | Eire |
| 69 | Margaret M Shea | 30 | Daughter | — | Mass |
| 70 | Leo J Shea | 33 | Son in law | Clerk | Mass |
| 71 | Leo J Shea | 4 | Grand son | — | Mass |
| 72 | Barry E Shea | 2 | Grand son | — | Mass |
| 73 | William A Kennedy | 50 | Head | Cutter | New York |
| 74 | Mary Kennedy | 52 | Wife | — | Mass |
| 75 | Mildred Kennedy | 25 | Daughter | Waitress | Mass |
| 76 | Doris Kennedy | 18 | Daughter | Bookkeeper | Mass |
| 77 | Harold C Wingfield | 45 | Head | Electrician | Mass |
| 78 | Mary A Wingfield | 43 | Wife | — | Mass |
| 79 | Margaret A Wingfield | 20 | Daughter | Filing Clerk | Mass |
| 80 | Eleanor Wingfield | 18 | Daughter | — | Mass |
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)