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Margaret Mcmahon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Margaret Mcmahon across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1865), then head of a 5-person household.
Age 75
b. ~1865
Female
Head
Born: Pennsylvania
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1865 |
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 |
|---|---|---|---|---|
| Norman Mcmahon | Other | — | 18 | ~1922 |
| Ella Mcmahon | Daughter | — | 27 | ~1913 |
| Margaret Mcmahon | Head | — | 75 | ~1865 |
| Marian Mcmahon | Other | — | 20 | ~1920 |
| John Mcmahon | Other | — | 22 | ~1918 |
Census Appearances
1920
Philadelphia, Pennsylvania
Head, age 53
Philadelphia, Pennsylvania · implied b. ~1867 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Other, age 64
Philadelphia, Pennsylvania · implied b. ~1866 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Head-H.R. |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| Age at First Marriage | 30 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | North Ireland |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 10.00 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Head, age 75
Philadelphia-County, Pennsylvania · implied b. ~1865 — 5 household members
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Mcmahon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Margaret Mcmahon
Head · 1940 · age 75 · b. ~1865 · Pennsylvania
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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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03713-00160)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Elmore | 14 | Son | — | Pennsylvania |
| 42 | Rose Elmore | 12 | Daughter | — | Pennsylvania |
| 43 | George Elmore | 11 | Son | — | Pennsylvania |
| 44 | Helen Elmore | 9 | Daughter | — | Pennsylvania |
| 45 | Anna Elmore | 5 | Daughter | — | Pennsylvania |
| 46 | Edward Elmore | 2 | Son | — | Pennsylvania |
| 47 | Eleanor Elmore | 1 | Daughter | — | Pennsylvania |
| 48 | Margaret Mcmahon THIS PERSON | 75 | Head | — | Pennsylvania |
| 49 | Ella Mcmahon | 27 | Daughter | Candy Packer | Pennsylvania |
| 50 | John Mcmahon | 22 | Grandson | Machine Operator | Pennsylvania |
| 51 | Norman Mcmahon | 18 | Grandson | New Worker | Pennsylvania |
| 52 | Marian Mcmahon | 20 | Granddaughter | — | Pennsylvania |
| 53 | Bernard Mcfadden | 30 | Head | Guard | Pennsylvania |
| 54 | Catherine Mcfadden | 25 | Wife | Bookkeeper | Pennsylvania |
| 55 | William Kelly | 26 | Head | Mail Clerk | Pennsylvania |
| 56 | Laura Kelly | 24 | Wife | Hairdresser | Pennsylvania |
| 57 | Gerald Kelly | 2 | Son | — | Pennsylvania |
| 58 | John Matthews | 62 | Head | Tailor | England |
| 59 | Theresa Matthews | 60 | Sister | — | England |
| 60 | Florence Portwood | 65 | Sister | — | England |
| 61 | Clark Shuster | 44 | Head | Salesman | Pennsylvania |
| 62 | Harriet Shuster | 27 | Wife | Nurse | Pennsylvania |
| 63 | Shirley Virginia Shuster | 3 | Daughter | — | Pennsylvania |
| 64 | Maude Shuster | 64 | Mother | — | Pennsylvania |
| 65 | Raphael Rubin | 50 | Head | Dental Instrument Maker | Lithuania |
| 66 | Mary Rubin | 48 | Wife | — | Lithuania |
| 67 | Irving Rubin | 24 | Son | New Worker | Pennsylvania |
| 68 | William Eisner | 24 | Head | New Worker | Pennsylvania |
| 70 | Jessie Sunner | 72 | Head | — | Pennsylvania |
| 71 | Emma Sunner | 75 | Wife | — | D.C. |
| 72 | Charles Sunner | 51 | Son | Paper Hanger | Pennsylvania |
| 73 | Katherine Mcdermott | 40 | Head | — | Pennsylvania |
| 74 | Joyce Mcdermott | 14 | Daughter | — | Pennsylvania |
| 75 | William Quinn | 31 | Head | Paper Hanger | Pennsylvania |
| 76 | Catherine Quinn | 32 | Wife | — | Pennsylvania |
| 77 | Catherine Quinn | 11 | Daughter | — | Pennsylvania |
| 78 | Elizabeth Quinn | 3 | Daughter | — | Pennsylvania |
| 79 | Harry Nevison | 69 | Head | Salesman Produce Man | Austria |
| 80 | Jennie Nevison | 57 | Wife | — | Pennsylvania |
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)