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Margaret Mcmahon — 1930 US Census Record
Model Tree available1930 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), with identified parents William & Anna — first a daughter (b.~1916), then head of a 3-person household.
Age 14
b. ~1916
Female
Daughter
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Union, New Jersey |
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 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 | Cranford Township |
| Est. Birth Year | ~1916 |
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 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcmahon | Daughter | — | 14 | ~1916 |
| William Mcmahon | Head | — | 44 | ~1886 |
| Anna Mcmahon | Spouse | — | 42 | ~1888 |
Census Appearances
1920
Union, New …
Daughter, age 4
Union, New Jersey · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Union, New …
Daughter, age 14
Union, New Jersey · implied b. ~1916 — 3 household members
| Surname | McMahon |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 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 …
Head, age 26
Union-County, New Jersey · implied b. ~1914 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Mahon |
| Given Name | Margaret |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Cranford Township |
| Occupation | Stenographer |
| Industry | Fire Insurance Co |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 1040 |
| Highest Grade | No 8 |
| 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. Identified parents: father William Mcmahon (~0.92 confidence) and mother Anna Mcmahon (~0.92 confidence) and mother Anna Mcmahon (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Mcmahon
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Anna Mcmahon
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Anna Mcmahon
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcmahon
Daughter · 1930 · age 14 · b. ~1916 · New Jersey
★ You are viewing this record
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:newjerseycensus00reel1385:0183)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Marie Justh | 49 | Wife | — | Poland |
| 52 | Frank Justh | 23 | Son | Mechanic | New Jersey |
| 53 | Joseph Justh | 21 | Son | Rapper | New Jersey |
| 54 | Henry Justh | 12 | Son | — | New Jersey |
| 55 | Edward Burton | 23 | Head | Press Rep. | Maryland |
| 56 | Mildred Burton | 20 | Wife | — | New York |
| 57 | Paul Walton | 24 | Lodger | Brakeman | Pennsylvania |
| 58 | Verona Walton | 24 | Wife | — | Pennsylvania |
| 59 | Reginald Stevens | 41 | Head | Cost Analyst | Mississippi |
| 60 | Jeanette Stevens | 35 | Wife | — | Illinois |
| 61 | Emerson Ball | 30 | Head | Cost Accountant | Illinois |
| 62 | Margery Ball | 32 | Wife | — | Illinois |
| 63 | Robert Ball | 4 | Son | — | Illinois |
| 64 | Barbara Ball | 2 | Daughter | — | Illinois |
| 65 | Frank E. Johnston | 35 | Head | Teller | New Jersey |
| 66 | Florence Johnston | 33 | Wife | — | New York |
| 67 | Mary E. Johnston | 6 | Daughter | — | New York |
| 68 | Floyd E. Johnston | 4 | Daughter | — | New York |
| 69 | Walter T. Beal | 38 | Head | Broker | New York |
| 70 | Mae E. Beal | 29 | Wife | — | New Jersey |
| 71 | Walter E. Beal | 7 | Son | — | New Jersey |
| 72 | Robert T. Beal | 4 | Son | — | New Jersey |
| 73 | Mary J. Beal | 2 | Daughter | — | New Jersey |
| 74 | Clyde J. King | 28 | Head | Stock Clerk | Connecticut |
| 75 | Bertha E. Snow | 49 | Mother-in-law | — | New Jersey |
| 76 | Henry Meyer | 26 | Lodger | Soda Clerk | Hamburg, Germ |
| 77 | Edwin Tide | 28 | Head | Clerk | New Jersey |
| 78 | Anna Tide | 69 | Mother | — | Canada Eng |
| 79 | William Mcmahon | 44 | Head | Mason | New Jersey |
| 80 | Anna Mcmahon | 42 | Wife | — | New Jersey |
| 81 | Margaret Mcmahon THIS PERSON | 14 | Daughter | — | New Jersey |
| 82 | Lloyd Howard | 58 | Head | Jeweler | Vermont |
| 83 | Bertha M. Howard | 49 | Wife | — | Canada Eng |
| 84 | Edgar M. Howard | 21 | Son | Installer | Massachusetts |
| 85 | Lloyd Howard | 12 | Son | — | Massachusetts |
| 86 | Russell Harsell | 38 | Head | Machinist | New Jersey |
| 87 | Mary Harsell | 38 | Wife | — | New Jersey |
| 88 | Elizabeth Harsell | 12 | Daughter | — | New Jersey |
| 89 | Howard Harsell | 11 | Son | — | New Jersey |
| 90 | Lois Harsell | 6 | Daughter | — | New Jersey |
| 91 | Patricia Harsell | 3 | Daughter | — | New Jersey |
| 92 | Charles Norberg | 41 | Head | Still Operator | New York |
| 93 | Tillie M. Norberg | 37 | Wife | — | New York |
| 94 | George Norberg | 15 | Son | — | New Jersey |
| 95 | Roberta Norberg | 11 | Daughter | — | New Jersey |
| 96 | Charles Norberg | 8 | Son | — | New Jersey |
| 97 | Allan Norberg | 5 | Son | — | New Jersey |
| 98 | Hazel Norberg | 4 | Daughter | — | New Jersey |
| 99 | Mildred Norberg | 1 | Daughter | — | New Jersey |
| 100 | Clarence Callahan | 33 | Head | Draftsman | Pennsylvania |
Pedigree Summary
Margaret
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)