MC
Mary Callahan — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Callahan across the 1920, 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 2-person household.
Age 42
b. ~1878
Female
Head
Born: Rhode Island
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Rhode Island |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Forewoman |
| Industry | Hosiery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Year of Naturalization | R |
| Birthplace (normalized) | rhode island |
| Occupation | Forewoman |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1878 |
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.
2 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Callahan | Daughter | — | 17 | ~1903 |
| Mary Callahan | Head | — | 42 | ~1878 |
Census Appearances
1920
Middlesex, Massachusetts
Head, age 42
Middlesex, Massachusetts · implied b. ~1878 — 2 household members
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Rhode Island |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Forewoman |
| Industry | Hosiery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Year of Naturalization | R |
| Birthplace (normalized) | rhode island |
1930
Middlesex, Massachusetts
Other, age 54
Middlesex, Massachusetts · implied b. ~1876 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Mother-in-law |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Rhode Island |
| Age at First Marriage | 26 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Housekeeper |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1940
Middlesex-County, Massachusetts
Other, age 64
Middlesex-County, Massachusetts · implied b. ~1876 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Mother-in-law |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Widowed |
| Birthplace | Rhode Island |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Industry | 0 |
| Highest Grade | G 4 |
| 1935 Residence | Same place |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
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 Callahan 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 Callahan
Head · 1920 · age 42 · b. ~1878 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Middlesex, Massachusetts
Open full size
1920 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu710unit:0966)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John P Stokes | 29 | Head | Machinist | New Hampshire |
| 52 | Mable A Stokes | 27 | Wife | None | Massachusetts |
| 53 | Phyllis Stokes | 0 | Daughter | None | Massachusetts |
| 54 | Leo Gagnon | 23 | Head | Router | Massachusetts |
| 55 | Loretta A Gagnon | 26 | Wife | None | Massachusetts |
| 56 | Gladys Gagnon | 1 | Daughter | None | Massachusetts |
| 57 | Daniel Runels | 78 | Head | None | New Hampshire |
| 58 | Helen M Tewksbury | 76 | Boarder | None | New Hampshire |
| 59 | Mary Yundell | 60 | Head | None | Ireland |
| 60 | Michael Kennedy | 47 | Brother | None | Ireland |
| 61 | James Barman | 64 | Head | Elevator | England |
| 62 | Mary Barman | 62 | Wife | None | England |
| 63 | William Shiris | 38 | Head | Twister | England |
| 64 | Annie Shiris | 32 | Wife | None | England |
| 65 | Mary Regan | 40 | Head | Weaver | Massachusetts |
| 66 | Catherine Regan | 36 | Sister | Weaver | Massachusetts |
| 67 | Jennie Cutridge | 48 | Head | None | England |
| 68 | Joseph Leahy | 46 | Head | Barber | Massachusetts |
| 69 | Mary Leahy | 53 | Sister | None | Massachusetts |
| 70 | Rose Leahy | 50 | Sister | None | Massachusetts |
| 71 | James H Whitney | 49 | Head | Machinist | New York |
| 72 | Rhoda Whitney | 48 | Wife | None | England |
| 73 | Ann Carter | 69 | Head | Machinist | England |
| 74 | Clara Carter | 29 | Daughter | None | Massachusetts |
| 75 | Edward Walsh | 59 | Head | Speed Tender | England |
| 76 | Elizabeth Walsh | 58 | Wife | None | England |
| 77 | Robert Walsh | 28 | Son | Operator | England |
| 78 | Bella Walsh | 18 | Daughter | Knitter | England |
| 79 | Nellie Walsh | 27 | Daughter | None | Ireland |
| 80 | Fred A Barnaby | 46 | Head | Machinist | Canada |
| 81 | Rebecca Barnaby | 41 | Wife | None | Canada |
| 82 | Ruby Barnaby | 13 | Daughter | None | Canada |
| 83 | Lillian Barnaby | 11 | Daughter | None | Canada |
| 84 | Martin Horan | 67 | Head | Helper | Ireland |
| 85 | Bridget Horan | 60 | Wife | None | Ireland |
| 86 | John K Mcmahon | 42 | Boarder | Fitter | Canada |
| 87 | Joseph F Marland | 48 | Head | Molder | Massachusetts |
| 88 | Jennie Marland | 42 | Wife | None | England |
| 89 | Ellen Marland | 14 | Daughter | None | Massachusetts |
| 90 | Jennie Morgan | 47 | Head | Weaver | England |
| 91 | Thomas Gardiner | 53 | Head | Signal Man | England |
| 92 | Elizabeth Gardiner | 52 | Wife | None | England |
| 93 | Mary Ogden | 37 | Head | None | England |
| 94 | Ethel Ogden | 28 | Sister | Warper | England |
| 95 | Mary Callahan THIS PERSON | 42 | Head | Forewoman | Rhode Island |
| 96 | Mary Callahan | 17 | Daughter | None | Massachusetts |
| 97 | Jesse Barlow | 48 | Head | None | England |
| 98 | Samuel Hague | 50 | Head | Weaver | England |
| 99 | Bessie Hague | 46 | Wife | None | England |
| 100 | Charles Thornton | 64 | Boarder | Janitor | Ireland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)