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Margaret Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Margaret Mccarthy across the 1910, 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents James & James — first a daughter (b.~1903), then head of a 5-person household.
Age 37
b. ~1903
Female
Daughter
Born: New Hampshire
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | McCarthy |
| Given Name | Margaret A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Salem city |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 1210 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Occupation | Bookkeeper |
| Township / Ward | Salem City |
| Est. Birth Year | ~1903 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mccarthy | Daughter | — | 37 | ~1903 |
| Mary Mccarthy | Daughter | — | 38 | ~1902 |
| James Mccarthy | Head | — | 77 | ~1863 |
| Charles Mccarthy | Son | — | 30 | ~1910 |
| Annie Mccarthy | Spouse | — | 70 | ~1870 |
Census Appearances
1910
Essex, Massachusetts
Daughter, age 8
Essex, Massachusetts · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacCarthy |
| Given Name | Margaret A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ire English |
| Can Read | Yes |
| Speaks English | English |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1920
Essex, Massachusetts
Daughter, age 17
Essex, Massachusetts · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Margaret A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1930
Essex, Massachusetts
Daughter, age 25
Essex, Massachusetts · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacCarthy |
| Given Name | Margaret A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Occupation | Bookkeeper |
| Industry | Department Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Essex-County, Massachusetts
Daughter, age 37
Essex-County, Massachusetts · implied b. ~1903 — 5 household members
| Surname | McCarthy |
| Given Name | Margaret A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Salem city |
| 1935 Residence (County) | Essex |
| Occupation | Bookkeeper |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 1210 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| 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 Margaret Mccarthy across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mccarthy (~0.92 confidence) and father James Mccarthy (~0.92 confidence) and father James Maccarthy (~0.92 confidence) and father James Maccarthy (~0.92 confidence) and mother Annie Maccarthy (~0.92 confidence) and mother Annie Mccarthy (~0.92 confidence) and mother Hannah Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mccarthy
b. ~1863
Source father
● Household
· direct · ~0.92
Father
James Mccarthy
b. ~1863
Source father
● Household
· direct · ~0.92
Father
James Maccarthy
b. ~1864
Source father
● Household
· direct · ~0.92
Father
James Maccarthy
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Annie Maccarthy
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Annie Mccarthy
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Hannah Mccarthy
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mccarthy
Daughter · 1940 · age 37 · b. ~1903 · Massachusetts
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Sibling
Charles Mccarthy
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mccarthy
Sibling · 1940 · age 38
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01589-00174)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Phillip Peterson | 47 | Head | Storekeeper | Russia |
| 2 | Blanche D Peterson | 40 | Wife | — | Poland |
| 3 | Doris Peterson | 9 | Daughter | — | Mass |
| 4 | Frances D Neizer | 32 | Head | — | Mass |
| 5 | Shirley Neizer | 11 | Daughter | — | Mass |
| 6 | R. Gerald Neizer | 9 | Son | — | Mass |
| 7 | Donald Neizer | 7 | Son | — | Mass |
| 8 | William R Hart | 43 | Head | Fireman | Mass |
| 9 | Elizabeth A Hart | 46 | Wife | — | Mass |
| 10 | Elizabeth N Hart | 17 | Daughter | Clerk | Mass |
| 11 | James P. J. Mccarthy | 77 | Head | — | Mass |
| 12 | Annie E Mccarthy | 70 | Wife | — | Ireland |
| 13 | Mary A Mccarthy | 38 | Daughter | Bookkeeper | Mass |
| 14 | Margaret A. Mccarthy THIS PERSON | 37 | Daughter | Bookkeeper | New Hampshire |
| 15 | Charles F. Mccarthy | 30 | Son | Draftsman | Mass |
| 16 | Mary A Richards | 71 | Head | — | Mass |
| 17 | Richard E Richards | 56 | Son | Handyman | Mass |
| 18 | James Ayers | 47 | Head | Storekeeper | Mass |
| 19 | James H Ayers | 22 | Son | Salesman | Mass |
| 20 | Robert F. Ayers | 19 | Son | Helper | Mass |
| 21 | Margaret Lawler | 24 | Lodger | Waitress | Vermont |
| 22 | Louis Fitzgerald | 54 | Head | Meatcutter | Mass |
| 23 | Annie M. Fitzgerald | 56 | Wife | — | Mass |
| 24 | Catherine Fitzgerald | 61 | Cousin | Housekeeper | Mass |
| 25 | Annie L. Berry | 43 | Head | Teacher | Mass |
| 26 | Chester Thomas | 45 | Head | Laborer | Mass |
| 27 | Winifred Thomas | 47 | Wife | — | Mass |
| 28 | Eileen Thomas | 22 | Daughter | New Worker | Mass |
| 29 | Evelyn Thomas | 19 | Daughter | Clerk | Mass |
| 30 | Eileen Thomas | 17 | Daughter | New Worker | Mass |
| 31 | Anna Thomas | 16 | Daughter | — | Mass |
| 32 | Bertram Thomas | 13 | Son | — | Mass |
| 33 | William Thomas | 7 | Son | — | Mass |
| 34 | William Manning | 53 | Head | Printer | Mass |
| 35 | Lena Manning | 52 | Wife | — | Canada |
| 36 | James F. Manning | 24 | Son | Page | Mass |
| 37 | Mary L. Manning | 21 | Daughter | — | Mass |
| 38 | Phillip E. Manning | 19 | Son | Page | Mass |
| 39 | Dorothy V. Manning | 17 | Daughter | — | Mass |
| 40 | Kenneth H. Manning | 16 | Son | — | Mass |
Pedigree Summary
Margaret + 2 siblings
Gen 1 · 7 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)