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Mary Blackburn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Blackburn across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1874), then head of a 3-person household.
Age 66
b. ~1874
Female
Spouse
Born: New Hampshire
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Newton city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Newton City |
| Est. Birth Year | ~1874 |
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 |
|---|---|---|---|---|
| A Blackburn | Son | — | 20 | ~1920 |
| Mary Blackburn | Spouse | — | 66 | ~1874 |
| Edward Blackburn | Head | — | 66 | ~1874 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 45
Middlesex, Massachusetts · implied b. ~1875 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Year of Immigration | 1893 |
| Naturalization Status | Alien |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Occupation | Hostess |
| Industry | Doctor |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1930
Middlesex, Massachusetts
Other, age 55
Middlesex, Massachusetts · implied b. ~1875 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburne |
| Given Name | Mary F |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Age at First Marriage | 42 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Middlesex-County, Massachusetts
Spouse, age 66
Middlesex-County, Massachusetts · implied b. ~1874 — 3 household members
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Newton city |
| 1935 Residence (County) | Middlesex |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Blackburn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Blackburn
Spouse · 1940 · age 66 · b. ~1874 · 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01615-00319)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sarah Woodland | 31 | Daughter | Designer | Mass |
| 42 | Ruth L. Gibbs | 57 | Cousin | — | Mass |
| 43 | Justin W. Shrader | 51 | Head | Lawyer | Illinois |
| 44 | Hazel Shrader | 44 | Wife | — | Mass |
| 46 | Roy E. B. Argenaugu | 62 | Head | Electrical Engineer | New York |
| 47 | Hyacinth Argenaugu | 58 | Wife | — | New Jersey |
| 48 | Katherine Argenaugu | 27 | Daughter | — | New York |
| 49 | Edward W. Tebbetts | 50 | Head | Executive | California |
| 50 | Enid W. Tebbetts | 45 | Wife | — | New York |
| 51 | Margaret Tebbetts | 21 | Daughter | — | New York |
| 52 | Edwin Tebbetts | 14 | Son | — | Mass |
| 53 | Ann B. Tebbetts | 8 | Daughter | — | Mass |
| 54 | Alice Delorey | 25 | Servant | Servant | Canada Fr. |
| 55 | Edward Blackburn | 66 | Head | — | Eire |
| 56 | Mary Blackburn THIS PERSON | 66 | Wife | — | New Hampshire |
| 57 | A. B. Edward Blackburn | 20 | Son | — | Mass |
| 58 | Payson Eupham | 55 | Head | Executive | Mass |
| 59 | Aileen Eupham | 53 | Wife | — | Penn. |
| 60 | Lewis Ab Eupham | 20 | Son | — | Mass |
| 61 | Geraldine Mcmilen | 43 | Head | — | Texas |
| 62 | William Mcmilen | 15 | Son | — | Mass |
| 63 | Warren B. Furguson | 40 | Head | Valve Mfg. | Mass |
| 64 | Elisabeth Furguson | 37 | Wife | — | New York |
| 65 | Barbara Furguson | 7 | Daughter | — | Mass |
| 66 | Priscilla Dillon | 35 | Servant | Servant | Mass |
| 67 | Walter E. Young | 44 | Head | Dentist | Mass |
| 68 | Elizabeth Young | 44 | Wife | — | Mass |
| 69 | Robert L. Young | 21 | Son | — | Mass |
| 70 | Lawrence C. Young | 19 | Son | — | Mass |
| 71 | Elinor Young | 15 | Daughter | — | Mass |
| 72 | Peleg B. Chandler | 55 | Head | Broker | Mass |
| 73 | Constance Chandler | 53 | Wife | — | Virginia |
| 74 | Eleanor Chandler | 21 | Daughter | — | Mass |
| 75 | Harriette Chandler | 20 | Daughter | — | Mass |
| 76 | Gordon B. White | 30 | Head | Partner | Mass |
| 77 | Elisabeth White | 26 | Wife | — | Mass |
| 78 | Carolyn White | 1 | Daughter | — | Mass |
| 79 | Frederick Wilder | 57 | Head | Investment Counselor | Mass |
| 80 | Ethel Wilder | 53 | Wife | — | 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)