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Margaret Mcmahon — 1930 US Census Record

Model Tree available

1930 United States Federal Census · Cortland, New York

Our Model Tree links this Margaret Mcmahon across the 1910, 1920 and 1930 US Censuses in Cortland, New York (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1900), then head of a 2-person household.

Age 30 b. ~1900 Female Daughter Born: New York Single

1930 Census Record Details

Census Year1930
LocationCortland, New York
SurnameMcMahon
Given NameMargaret E.
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age30
Marital StatusSingle
BirthplaceNew York
Father's BirthplaceIreland
Mother's BirthplaceNew York
Additional Details
OccupationMachine operator
IndustryCorset factory
Class of WorkerW
Can Read/WriteYes
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationMachine Operator
Township / WardCortland City
Est. Birth Year~1900

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.

2 people recorded at the same address in the 1930 census.

Name Relation to head Relative to Margaret Age Birth yr
Margaret Mcmahon Daughter — 30 ~1900
Nellie Mcmahon Head — 57 ~1873

Census Appearances

1910
Cortland, New …
Daughter, age 11
Cortland, New York · implied b. ~1899 — 5 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name Margaret
Relationship to Head daughter
Sex F
Color / Race White
Age 11
Marital Status Single
Birthplace New York
Father's Birthplace Ireland
Mother's Birthplace New York
Occupation none
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1920
Cortland, New …
Daughter, age 20
Cortland, New York · implied b. ~1900 — 5 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name Margaret
Relationship to Head Daughter
Sex F
Color / Race White
Age 20
Marital Status Single
Birthplace New York
Father's Birthplace Ireland
Mother's Birthplace New York
Occupation Laborer
Industry Corset Factory
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
Cortland, New …
Daughter, age 30
Cortland, New York · implied b. ~1900 — 2 household members
Surname McMahon
Given Name Margaret E.
Relationship to Head Daughter
Sex F
Color / Race White
Age 30
Marital Status Single
Birthplace New York
Father's Birthplace Ireland
Mother's Birthplace New York
Occupation Machine operator
Industry Corset factory
Class of Worker W
Can Read/Write Yes
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 Margaret Mcmahon across 3 US Census years (1910, 1920 and 1930) in Cortland, New York, using XGBoost record linkage. Identified parents: father John Mcmahon (~0.92 confidence) and father John Mcmahon (~0.92 confidence) and mother Julia Mcmahon (~0.92 confidence) and mother Nellie Mcmahon (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
John Mcmahon
b. ~1862
Source father
● Household · direct · ~0.92
Father
John Mcmahon
b. ~1863
Source father
● Household · direct · ~0.92
Mother
Julia Mcmahon
b. ~1872
Source mother
● Household · direct · ~0.92
Mother
Nellie Mcmahon
b. ~1873
Source mother
● Household · direct · ~0.92
This person
Anchor record
Margaret Mcmahon
Daughter · 1930 · age 30 · b. ~1900 · 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 — Cortland, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1418:0351)

Line Name Age Relation Occupation Birthplace
1 Allie Livingston 42 Head Finisher New York
2 Mary B. Popp 81 Roomer Inspector New York
3 Ruth S. Robinson 30 Head Waitress New York
4 William Ercanback 47 Head Chauffeur New York
5 Pauline O. Ercanback 46 Wife — New York
6 Nellie Mcmahon 57 Head Cook New York
7 Margaret E. Mcmahon THIS PERSON 30 Daughter Machine Operator New York
8 Ernest M. Denson 53 Head Presser New York
9 Mary Denson 50 Wife — England
10 Mary J. Denson 24 Daughter Machine Operator New York
11 Charles F. Mason 53 Head Optometrist New York
12 Mary Anna Mason 56 Wife — New York
13 Harry Wilcox 64 Head Retired New York
14 Rose Jane Wilcox 66 Wife — New York
15 Emma Mumford 70 Head — New York
16 Fred Case 47 Head Purchasing Agent Pennsylvania
17 Nellie Case 46 Wife — New York
18 Reginald Case 22 Son Office Clerk Pennsylvania
19 Melville A. Case 70 Father Agent Pennsylvania
20 Jere R. Wickwire 63 Head Publisher New York
21 Elizabeth M. Wickwire 43 Wife — New York
22 Jere Jr. Wickwire 13 Son — New York
23 Charles Wickwire 50 Head Manufacturer New York
24 Mabel F. Wickwire 50 Wife — New York
25 Charlotte R. Wickwire 21 Daughter — New York
26 Florence Hill 70 Servant Servant Massachusetts
27 Nellie Sings 46 Servant Servant New York
28 Marian Wickwire 40 Head — New York
29 Charlotte Taylor 28 Waitress Waitress Ireland
30 Mary L. West 65 Servant Servant New York
31 Anna Moscrop 20 Servant Nurse Maid England
32 Winthrop Wickwire 6 Son — New York
33 Cynthia Wickwire 16 Daughter — New York
34 Maude Duffey 58 Head — New York
35 Elma Steel 27 Servant Servant New York
36 Martha L. Walsh 65 Cook Cook New York
37 William Ercanbrack 72 Head — New York
38 Elizabeth Ercanbrack 70 Wife — New York
39 Carlton H. Ercanbrack 45 Son Meter Reader New York
40 Frank J. Peck 66 Head President Connecticut
41 Annie B. Peck 64 Wife — New York
42 Anna Quinlan 51 Servant Servant New York
43 Frederick R. Simpson 62 Head President New York
44 Fanny B. Simpson 62 Wife — New York
45 Gretta S. Burdick 63 Servant Housekeeper New York
46 Harriet A. Wickwire 31 Head — New York
47 Alice Kingman 67 Cousin — New York
48 Bette C. Williams 23 Cousin Trained Nurse New York
49 Jessie Mcdowell 50 Servant Housekeeper Scotland
50 James O'Neil 33 Head Electrician New York

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Pedigree Summary

Margaret
Gen 1 · 4 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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