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Mary Logan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Logan across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 9-person household.
Age 20
b. ~1920
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Logan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 800 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Somerville |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Mary Logan | Daughter | — | 20 | ~1920 |
| Esther Logan | Daughter | — | 9 | ~1931 |
| Margaret Logan | Daughter | — | 15 | ~1925 |
| Elizabeth Logan | Daughter | — | 13 | ~1927 |
| Patrick Logan | Head | — | 46 | ~1894 |
| Joseph Logan | Son | — | 9 | ~1931 |
| James Logan | Son | — | 18 | ~1922 |
| John Logan | Son | — | 17 | ~1923 |
| Mary Logan | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 10
Suffolk, Massachusetts · implied b. ~1920 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Logan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Northern Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 20
Middlesex-County, Massachusetts · implied b. ~1920 — 9 household members
| Surname | Logan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 800 |
| Highest Grade | H-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 Logan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Logan
Daughter · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Margaret Logan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Logan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Logan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Logan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Logan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Logan
Sibling · 1940 · age 17
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-t0627-01705-00362)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patrick Logan | 46 | Head | Contractor | Eire |
| 2 | Mary Logan | 48 | Wife | — | Eire |
| 3 | Mary Logan THIS PERSON | 20 | Daughter | Clerk | Massachusetts |
| 4 | James Logan | 18 | Son | Laborer | Massachusetts |
| 5 | John Logan | 17 | Son | — | Massachusetts |
| 6 | Margaret Logan | 15 | Daughter | — | Massachusetts |
| 7 | Elizabeth Logan | 13 | Daughter | — | Massachusetts |
| 8 | Esther Logan | 9 | Daughter | — | Massachusetts |
| 9 | Joseph Logan | 9 | Son | — | Massachusetts |
| 10 | Albert Mcmahon | 52 | Head | Captain | Massachusetts |
| 11 | Frances Mcmahon | 47 | Wife | — | Massachusetts |
| 12 | Dorothy Patricia Mcmahon | 16 | Daughter | — | Massachusetts |
| 13 | Albert T. Mcmahon | 12 | Son | — | Massachusetts |
| 14 | Edwin W. Newson | 47 | Head | Clerk | Massachusetts |
| 15 | Grace Newson | 37 | Wife | — | Massachusetts |
| 16 | Edwin Jr. Newson | 15 | Son | — | Massachusetts |
| 17 | Helen Newson | 14 | Daughter | — | Massachusetts |
| 18 | Gunnar O. Swanson | 58 | Head | Painter | Sweden |
| 19 | Berna Swanson | 53 | Wife | — | Sweden |
| 20 | Gunnar H. Swanson | 26 | Son | Waiter | Massachusetts |
| 21 | Linwood G. Swanson | 18 | Son | — | Massachusetts |
| 22 | David Mckinney | 46 | Head | — | Scotland |
| 23 | Sybil Mckinney | 23 | Daughter | Clerk | Massachusetts |
| 24 | Janet Mckinney | 21 | Daughter | Waitress | Massachusetts |
| 25 | John Winter | 25 | Head | Furrier | Massachusetts |
| 26 | Elizabeth Winter | 22 | Wife | — | Massachusetts |
| 27 | Ethel Robinson | 58 | Head | — | Massachusetts |
| 28 | Marjorie Robinson | 28 | Daughter | Dental | Massachusetts |
| 29 | Richard Robinson | 22 | Son | Clerk | Massachusetts |
| 30 | Edwin Robinson | 18 | Son | — | Massachusetts |
| 31 | Stearns Burgess | 65 | Head | Proofreader | Massachusetts |
| 32 | Martha Burgess | 63 | Wife | — | Massachusetts |
| 33 | Daniel Mathieson | 57 | Head | — | Canada-Fr |
| 34 | Catherine Mathieson | 60 | Wife | — | Canada-Fr |
| 35 | Edward Mathieson | 22 | Son | Clerk | Massachusetts |
| 36 | George W. Phelps | 68 | Head | Buyer | Vermont |
| 37 | Eleanor Phelps | 65 | Wife | — | Canada-Fr |
| 38 | John Enos | 27 | Head | Baker | Massachusetts |
| 39 | Ella Enos | 25 | Wife | — | Massachusetts |
| 40 | Catherine Enos | 1 | 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)