MM
Margaret Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Margaret Mccarthy across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Harry & Margaret — first a daughter (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | McCarthy |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1917 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mccarthy | Daughter | — | 23 | ~1917 |
| Charles Mccarthy | Head | — | 49 | ~1891 |
| Lena Mccarthy | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Philadelphia, Pennsylvania
Daughter, age 2
Philadelphia, Pennsylvania · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarty |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Daughter, age 13
Philadelphia, Pennsylvania · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Daughter, age 23
Philadelphia-County, Pennsylvania · implied b. ~1917 — 3 household members
| Surname | McCarthy |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Mccarty (~0.92 confidence) and mother Margaret Mccarty (~0.92 confidence) and father Charles Mccarthy (~0.92 confidence) and father Charles Mccarthy (~0.92 confidence) and mother Lena Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Mccarty
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Margaret Mccarty
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
Charles Mccarthy
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Charles Mccarthy
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Lena Mccarthy
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mccarthy
Daughter · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03749-00105)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marniff Miniff | 26 | Wife | — | Pennsylvania |
| 42 | Mandan Miniff | 87 | Head | — | England |
| 43 | Mandan Miniff | 60 | Daughter | — | England |
| 44 | Herman Kahn | 38 | Head | Printer | Germany |
| 45 | Lena Kahn | 35 | Wife | — | Germany |
| 46 | George Laurie | 56 | Head | Printer | Scotland |
| 47 | Elizabeth Laurie | 55 | Wife | — | Scotland |
| 48 | Richard Lanyon | 48 | Head | Examiner | Pennsylvania |
| 49 | Annie Lanyon | 40 | Wife | — | Pennsylvania |
| 50 | Edgar Lanyon | 12 | Son | — | Pennsylvania |
| 51 | Richard Lanyon | 11 | Son | — | Pennsylvania |
| 52 | Anna Marie Lanyon | 7 | Daughter | — | Pennsylvania |
| 53 | Howard Lanyon | 5 | Son | — | Pennsylvania |
| 54 | Matthew Brazier | 77 | Head | — | Pennsylvania |
| 55 | Mary A Brazier | 60 | Wife | — | Pennsylvania |
| 56 | John D Delaney | 57 | Head | Dealer | Pennsylvania |
| 57 | Gertrude M Delaney | 54 | Wife | — | Pennsylvania |
| 58 | Elizabeth Gray | 73 | Head | — | Scotland |
| 59 | Angela Gray | 36 | Daughter | Stenographer | Pennsylvania |
| 60 | George Gray | 33 | Son | Truck Driver | Pennsylvania |
| 61 | Edward Mulvaney | 58 | Head | Plasterer | Pennsylvania |
| 62 | Mary Mulvaney | 59 | Wife | — | Ireland |
| 63 | Frank Mulvaney | 23 | Son | Plasterer | Pennsylvania |
| 64 | Arthur Mulvaney | 20 | Son | Carpenter | Pennsylvania |
| 65 | George Heeter | 40 | Head | Dealer | Pennsylvania |
| 66 | Rose Heeter | 38 | Wife | — | Pennsylvania |
| 67 | George Heeter | 11 | Son | — | Pennsylvania |
| 68 | Edward Heeter | 8 | Son | — | Pennsylvania |
| 69 | Joseph Strange | 60 | Head | Detective | Pennsylvania |
| 70 | Mary M Strange | 52 | Wife | — | Pennsylvania |
| 71 | Claire Strange | 25 | Daughter | Stenographer | Pennsylvania |
| 72 | Joseph Strange | 23 | Son | — | Pennsylvania |
| 73 | Thomas Strange | 22 | Son | — | Pennsylvania |
| 74 | Charles Mccarthy | 49 | Head | Plumbing | Pennsylvania |
| 75 | Lena Mccarthy | 48 | Wife | — | Pennsylvania |
| 76 | Margaret Mccarthy THIS PERSON | 23 | Daughter | — | Pennsylvania |
| 77 | James Ludwig | 65 | Head | Appraiser | Ireland |
| 78 | Ellen Ludwig | 65 | Wife | — | Pennsylvania |
| 79 | Paul Ludwig | 33 | Son | — | Pennsylvania |
| 80 | Catherine Ludwig | 31 | Daughter | Secretary | Pennsylvania |
Pedigree Summary
Margaret
Gen 1 · 5 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)