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John Mcmahon — 1930 US Census Record

Model Tree available

1930 United States Federal Census · Rensselaer, New York

Our Model Tree links this John Mcmahon across the 1910, 1920 and 1930 US Censuses in Rensselaer, New York (XGBoost, ~Confirmed), with identified parents Michael & Catherine — first a head (b.~1901), then head of a 3-person household.

Age 29 b. ~1901 Male Head Born: New York Married

1930 Census Record Details

Census Year1930
LocationRensselaer, New York
SurnameMcMahon
Given NameJohn
Relationship to HeadHead
SexM
Color / RaceWhite
Age29
Marital StatusMarried
BirthplaceNew York
Age at First Marriage27
Father's BirthplaceNew York
Mother's BirthplaceNew York
Additional Details
OccupationTypewriter
IndustryDepartment
Class of WorkerW
Can Read/WriteYes
Home Owned/RentedR
Home Value / Rent15
Radio SetR
VeteranNo
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationTypewriter
Township / WardTroy City
Est. Birth Year~1901

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 John Age Birth yr
Catherine Mcmahon Daughter — 1 ~1929
John Mcmahon Head — 29 ~1901
Anna Mcmahon Other — 21 ~1909

Census Appearances

1910
Rensselaer, New …
Son, age 8
Rensselaer, New York · implied b. ~1902 — 7 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 8
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1920
Rensselaer, New …
Son, age 19
Rensselaer, New York · implied b. ~1901 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 19
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Occupation Chauffeur
Industry Private
Class of Worker W
Can Read Yes
Can Write Yes
Speaks English Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
Rensselaer, New …
Head, age 29
Rensselaer, New York · implied b. ~1901 — 3 household members
Surname McMahon
Given Name John
Relationship to Head Head
Sex M
Color / Race White
Age 29
Marital Status Married
Birthplace New York
Age at First Marriage 27
Father's Birthplace New York
Mother's Birthplace New York
Occupation Typewriter
Industry Department
Class of Worker W
Can Read/Write Yes
Home Owned/Rented R
Home Value / Rent 15
Radio Set R
Veteran No
Birth State New York
Birth Country United States
Birthplace (normalized) new york

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.
Model Tree available
Our Model Tree links John Mcmahon across 3 US Census years (1910, 1920 and 1930) in Rensselaer, New York, using XGBoost record linkage. Identified parents: father Michael Mcmahon (~0.92 confidence) and mother Catherine Mcmahon (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
Michael Mcmahon
b. ~1874
Source father
● Household · direct · ~0.92
Mother
Catherine Mcmahon
b. ~1880
Source mother
● Household · direct · ~0.92
This person
Anchor record
John Mcmahon
Head · 1930 · age 29 · b. ~1901 · New York
★ 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 — Rensselaer, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1639:0081)

Line Name Age Relation Occupation Birthplace
1 Betty Maas 22 Daughter Educator New York
2 Frank Maas 20 Son Clerk New York
3 Joseph Dorsey 24 Head Foreman New York
4 Mary Dorsey 24 Wife-H None New York
5 Anna M. Dorsey 2 Daughter None New York
6 Joseph Bode 53 Head Core Maker England
7 Susan Bode 50 Wife-H None England
8 Howard Bode 28 Son Electrician New York
9 William Bode 24 Son Bookkeeper New York
10 Thomas Bode 18 Son None New York
11 Isabelle Turner 74 Head Proprietor England
12 William Congdon 49 Head Janitor New York
13 Sarah J. Congdon 40 Wife-H None New York
14 Adelaide Congdon 14 Daughter None New York
15 Bridget Congdon 74 Mother None New York
16 Theodore Le Beau 67 Head None Canada-French
17 William Le Beau 40 Son Machine Helper New York
18 Celine Watson 47 Daughter Turner New York
19 Rose Marie Watson 17 Daughter None New York
20 Elizabeth Collins 59 Head None New York
21 John Hanson 41 Head Superintendent New York
22 Alice Hanson 38 Wife-H None New York
23 John M. Walton 60 Head None New York
24 Katherine Walton 35 Daughter Teacher New York
25 Mattie Walton 45 Brother Salesman New York
26 Francis J. Walton 35 Brother None New York
27 Helen C. Walton 42 Sister Saleslady New York
28 Anna L. Berry 53 Sister Collar Worker New York
29 Frank J. Hennessey 25 Nephew Brakeman New York
30 John F. Rev. Cummins 44 Head Clergyman New York
31 Francis Rev. Brady 39 Assistant Clergyman New York
32 Josephine Kelly 52 Housekeeper Housekeeper New York
33 Helen Kelly 18 Lodger Stenographer Massachusetts
34 Michael Kennedy 54 Head Laborer Irish Free State
35 Thomas Kennedy 14 Son Porter New York
36 Catherine Kennedy 12 Daughter None New York
37 Thomas Pillane 42 Head Special Officer Irish Free State
38 Catherine Pillane 30 Wife-H None Irish Free State
39 Thomas Pillane 12 Son None New York
40 Catherine Pillane 10 Daughter None New York
41 Anna May Pillane 6 Daughter None New York
42 James Pillane 4 Son None New York
43 Hattie Vaughan 43 Head None New York
44 Alice Fallon 85 Boarder None Irish Free State
45 John Mcmahon THIS PERSON 29 Head Typewriter New York
46 Anna M. Mcmahon 21 Wife-H None New York
47 Catherine Mcmahon 1 Daughter None New York
48 Thomas Clancy 49 Head Mechanic Irish Free State
49 Catherine Clancy 85 Mother None England
50 Edward Munck 42 Head Chemist New York

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Pedigree Summary

John
Gen 1 · 2 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)

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