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Margaret Mcmahon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Union, New Jersey
Our Model Tree links this Margaret Mcmahon across the 1920, 1930 and 1940 US Censuses in Union, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1898), then head of a 6-person household.
Age 32
b. ~1898
Female
Spouse
Born: New Jersey
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Union, New Jersey |
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 19 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Plainfield City |
| Est. Birth Year | ~1898 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Martin Mcmahon | Head | — | 31 | ~1899 |
| Margaret Mcmahon | Spouse | — | 32 | ~1898 |
| Margaret Mcmahon | Daughter | — | 3 | ~1927 |
| Edgar Mcmahon | Son | — | 5 | ~1925 |
| Lydia Mcmahon | Daughter | — | 12 | ~1918 |
| Edward Mcmahon | Son | — | ~1930 |
Census Appearances
1920
Union, New …
Daughter, age 22
Union, New Jersey · implied b. ~1898 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Margaret E |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Union, New …
Spouse, age 32
Union, New Jersey · implied b. ~1898 — 6 household members
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 19 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Spouse, age 42
Union-County, New Jersey · implied b. ~1898 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Marguerite |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Plainfield City |
| 1935 Residence (County) | Union |
| Class of Worker | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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
Spouse · 1930 · age 32 · b. ~1898 · New Jersey
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Union, New Jersey
Open full size
1930 US Federal Census — Union, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1389:0173)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Lydie D. Schult | 50 | Head | Housewife | New York |
| 52 | Howard F. Miller | 54 | Head | Foreman | New Jersey |
| 53 | Edith V. Miller | 47 | Wife | — | New Jersey |
| 54 | Dorothy L. Miller | 20 | Daughter | Stenographer | New Jersey |
| 55 | Edward F. Miller | 18 | Son | Stock Clerk | New Jersey |
| 56 | Rose E. Miller | 4 | Daughter | — | New Jersey |
| 57 | Ruth-Agnes D. Miller | 0 | Daughter | — | New Jersey |
| 58 | Ezekiel E. Gallup | 58 | Head | Practitioner | Connecticut |
| 59 | Ann Gallup | 55 | Wife | Cook | Virginia |
| 60 | Samuel G. Hunter | 67 | Head | — | England |
| 61 | Millicent Hunter | 72 | Sister | — | New Jersey |
| 62 | Isabelle Hunter | 70 | Sister | — | New Jersey |
| 63 | Oscar F. Tandberg | 40 | Head | Railroad | New Jersey |
| 64 | Annie J. Tandberg | 40 | Wife | — | New Jersey |
| 65 | Doris J. Tandberg | 13 | Daughter | — | New Jersey |
| 66 | Elmer F. Tandberg | 7 | Son | — | New Jersey |
| 67 | Charles J. Singer | 45 | Head | — | Germany |
| 68 | Bertha Singer | 45 | Wife | — | New Jersey |
| 69 | Simon Trock | 69 | Head | — | Germany |
| 70 | Barbara F. Trock | 63 | Wife | — | Germany |
| 71 | Peter Masky | 70 | Head | — | Germany |
| 72 | Christine Masky | 56 | Wife | — | Germany |
| 73 | Alice Masky | 14 | Daughter | — | New Jersey |
| 74 | Harry Snidany | 53 | Head | Clerk | New Jersey |
| 75 | Enid Snidany | 35 | Wife | — | New Jersey |
| 76 | Francis Miller | 23 | Head | Auto Sales | New Jersey |
| 77 | Marion Miller | 26 | Wife | — | New Jersey |
| 78 | Martin Mcmahon | 31 | Head | Store Clerk | New Jersey |
| 79 | Margaret Mcmahon THIS PERSON | 32 | Wife | — | New Jersey |
| 80 | Lydia D. Mcmahon | 12 | Daughter | — | New Jersey |
| 81 | Edgar W. Mcmahon | 5 | Son | — | New Jersey |
| 82 | Margaret Mcmahon | 3 | Daughter | — | New Jersey |
| 83 | Edward C. Mcmahon | 0 | Son | — | New Jersey |
| 84 | Philip Wittie | 50 | Head | Barber | New York |
| 85 | Elizabeth Wittie | 46 | Wife | — | New Jersey |
| 86 | William E. Wittie | 5 | Son | — | New Jersey |
| 87 | Harry Rassmussen | 37 | Head | Salesman | New Jersey |
| 88 | Augusta Rassmussen | 40 | Wife | — | New Jersey |
| 89 | Ross R. Cardiff | 46 | Head | Ticket Agent | Pennsylvania |
| 90 | Ida M. Cardiff | 48 | Wife | — | New Jersey |
| 91 | Charles Mccann | 48 | Head | Laborer | New Jersey |
| 92 | Alice Mccann | 45 | Wife | — | New Jersey |
| 93 | James J. Hartigan | 26 | Head | Agent | Virginia |
| 94 | Edith M. Hartigan | 23 | Wife | — | New Jersey |
| 95 | William F. Sauer | 43 | Head | Mail Carrier | New Jersey |
| 96 | Julia Sauer | 43 | Wife | Matron | New Jersey |
| 97 | Laura Sauer | 15 | Daughter | — | New Jersey |
| 98 | M. Perry Hart | 75 | Head | — | New Jersey |
| 99 | Abe Letic | 50 | Head | Machinist | Poland |
| 100 | Beckey Letic | 48 | Wife | — | Poland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)