John Mcelroy — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Custer, Montana

Our Model Tree links this John Mcelroy across the 1920 and 1930 US Censuses in Custer, Montana (XGBoost, ~Confirmed) — first a son (b.~1914), then head of a 5-person household.

Age 16 b. ~1914 Male Son Born: Montana Single

1930 Census Record Details

Census Year	1930
Location	Custer, Montana
Surname	McElroy
Given Name	John A.
Relationship to Head	Son
Sex	M
Color / Race	White
Age	16
Marital Status	Single
Birthplace	Montana
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Additional Details
Can Read/Write	Yes
Birth State	Montana
Birth Country	United States
Birthplace (normalized)	montana
Township / Ward	Miles City
Est. Birth Year	~1914

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 1930 census.

Name	Relation to head	Relative to John	Age	Birth yr
John Mcelroy	Son	—	16	~1914
John Mcelroy	Head	—	41	~1889
Marjorie Mcelroy	Daughter	—	13	~1917
Mary Mcelroy	Daughter	—	17	~1913
Bess Mcelroy	Spouse	—	42	~1888

Census Appearances

1920

Custer, Montana

Son, age 6

Custer, Montana · implied b. ~1914 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	McElroy
Given Name	John H.
Relationship to Head	Son
Sex	M
Color / Race	White
Age	6
Marital Status	Single
Birthplace	Montana
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Birth State	Montana
Birth Country	United States
Birthplace (normalized)	montana

1930

Custer, Montana

Son, age 16

Custer, Montana · implied b. ~1914 — 5 household members

Surname	McElroy
Given Name	John A.
Relationship to Head	Son
Sex	M
Color / Race	White
Age	16
Marital Status	Single
Birthplace	Montana
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Can Read/Write	Yes
Birth State	Montana
Birth Country	United States
Birthplace (normalized)	montana

Model Tree

Linked across censuses

Our Model Tree links John Mcelroy across 2 US Census years (1920 and 1930) in Custer, Montana, using XGBoost record linkage.

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This person

Anchor record

John Mcelroy

Son · 1930 · age 16 · b. ~1914 · Montana

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Sibling

Marjorie Mcelroy

Sibling · 1930 · age 13

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Mary Mcelroy

Sibling · 1930 · age 17

Source co-child of head (derived)

● Co-child · derived · ~0.88

Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1930 US Federal Census — Custer, Montana Open full size

Page Contents

50 people indexed on this census page (ia:1930:15thcensus1254unit:0194)

Line	Name	Age	Relation	Occupation	Birthplace
51	John Lysne	30	Head	Laborer	Minnesota
52	Paul F. Julius	24	Head	Truck Driver	Minnesota
53	Inez H. Julius	24	Wife	—	Iowa
54	Paul Julius	0	Son	—	Montana
55	Nick Costa	46	Head	Boilermaker Helper	Italy
56	Vera Costa	38	Wife	—	Italy
57	Vera Costa	4	Daughter	—	Montana
58	Clyde G. Mcmillan	31	Head	Stationary Eng.	Illinois
59	Irma L. Mcmillan	24	Wife	Bookkeeper	Montana
60	Walter H. Mcmillan	1	Son	—	Montana
61	Nora Hagen	31	Roomer	Saleswoman	Norway
62	Alice Hagen	33	Roomer	Dressmaker	Minnesota
63	Jacob W. Hunt	46	Head	Stationary Eng.	Minnesota
64	Hattie G. Hunt	45	Wife	Dressmaker	Norway
65	Percy J. Hunt	16	Son	—	Minnesota
66	Bernice D. Hunt	15	Daughter	—	Montana
67	George Truman Hunt	11	Son	—	Montana
68	Sven H. Amundson	47	Head	Watchmaker	Norway
69	Catherine Amundson	42	Wife	—	South Dakota
70	Howard B. Amundson	21	Son	—	South Dakota
71	Margaret S. Amundson	14	Daughter	—	South Dakota
72	C. C. Cloud	35	Head	Salesman	Texas
73	Minnie H. Cloud	63	Mother	Dressmaker	Texas
74	Audrey P. Cloud	25	Sister	Teller	Texas
75	John M. Porter	38	Head	Salesman	Wisconsin
76	Kathryn Porter	37	Wife	—	Wisconsin
77	William J. Porter	10	Son	—	Montana
78	Mary Fay Porter	9	Daughter	—	Montana
79	M. J. Michelson	31	Head	Agent	Minnesota
80	Alice B. Michelson	30	Wife	—	Tennessee
81	Robert E. Michelson	7	Son	—	Montana
82	William J. Michelson	6	Son	—	Montana
83	Mary Louise Michelson	1	Daughter	—	Montana
84	H. L. Esken	51	Father-in-law	—	Illinois
85	Claude Everett	48	Head	Wire Chief	Illinois
86	Shellie Everett	40	Wife	—	Missouri
87	Chas. W. Coltrin	26	Head	Clerk	Illinois
88	Iva M. Coltrin	22	Wife	—	Iowa
89	Iva Mae Coltrin	3	Daughter	—	Montana
90	James F. Richards	70	Head	Carpenter	Missouri
91	Ida M. Richards	51	Wife	—	Pennsylvania
92	John Mcelroy	41	Head	Dry Cleaner	Iowa
93	Bess S. Mcelroy	42	Wife	—	Iowa
94	Mary L. Mcelroy	17	Daughter	—	Montana
95	John A. Mcelroy THIS PERSON	16	Son	—	Montana
96	Marjorie L. Mcelroy	13	Daughter	—	Montana
97	Percy E. Mottram	38	Head	Agent	Illinois
98	Bernice M. Mottram	36	Wife	—	Minnesota
99	Edward G. Mottram	14	Son	—	Minnesota
100	Richard D. Mottram	10	Son	—	Minnesota

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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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