John Mahoney — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · St Clair, Michigan

Our Model Tree links this John Mahoney across the 1920, 1930 and 1940 US Censuses in St Clair, Michigan (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 4-person household.

Age 60 b. ~1870 Male Head Born: Michigan Single

1930 Census Record Details

Census Year	1930
Location	St Clair, Michigan
Surname	Mahoney
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	60
Marital Status	Single
Birthplace	Michigan
Father's Birthplace	Irish Free State
Mother's Birthplace	Irish Free State
Additional Details
Occupation	Laborer
Industry	Odd Jobs
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	O
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan
Occupation	Laborer
Township / Ward	Emmett Township
Est. Birth Year	~1870

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
Blanche Clark	Daughter	—	23	~1907
John Mahoney	Head	—	60	~1870
Emma Clark	Other	—	63	~1867
Daniel Clark	Other	—	68	~1862

Census Appearances

1920

St Clair, …

Other, age 52

St Clair, Michigan · implied b. ~1868 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mahony
Given Name	John
Relationship to Head	Boarder
Sex	M
Color / Race	White
Age	52
Marital Status	Single
Birthplace	Michigan
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Laborer
Industry	Draper Foundry
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

1930

St Clair, …

Head, age 60

St Clair, Michigan · implied b. ~1870 — 4 household members

Surname	Mahoney
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	60
Marital Status	Single
Birthplace	Michigan
Father's Birthplace	Irish Free State
Mother's Birthplace	Irish Free State
Occupation	Laborer
Industry	Odd Jobs
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	O
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

1940

St.-Clair-County, Michigan

Other, age 74

St.-Clair-County, Michigan · implied b. ~1866 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mahoney
Given Name	John
Relationship to Head	Boarder
Sex	M
Color / Race	White
Age	74
Marital Status	Single
Birthplace	Michigan
1935 Residence (City)	Emmett Twp
1935 Residence (County)	Saint Clair
Hours Worked	0
Highest Grade	No 4
1935 Residence	Same Place
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

Model Tree

Linked across censuses

Our Model Tree links John Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

John Mahoney

Head · 1930 · age 60 · b. ~1870 · Michigan

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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 — St Clair, Michigan Open full size

Page Contents

50 people indexed on this census page (ia:1930:michigancensus00reel1024:0864)

Line	Name	Age	Relation	Occupation	Birthplace
1	Maynard	4	Son	—	Michigan
2	Thomas Lawrence	29	Head	Laborer	Michigan
3	Gertrude Lawrence	20	Wife-H	—	Michigan
4	James G. Lawrence	2	Son	—	Michigan
5	Harold Cape	29	Head	Sailor	Michigan
6	Iva Cape	29	Wife-H	—	Michigan
7	Robert Cape	5	Son	—	Michigan
8	Elatha Cape	2	Daughter	—	Michigan
9	John Mahoney THIS PERSON	60	Head	Laborer	Michigan
10	Daniel Clark	68	R	Farmer	Canada-English
11	Emma Clark	63	Wife-H	—	Michigan
12	Blanche Clark	23	Daughter	—	Michigan
13	Douglas Mcclaren	36	Head	Farmer	Michigan
14	Clara Mcclaren	33	Wife-H	—	Michigan
15	Irving Mcclaren	11	Son	—	Michigan
16	Ray Mcclaren	9	Son	—	Michigan
17	John Carney	59	Head	Farmer	Michigan
18	Charlene Carney	58	Wife-H	—	Ohio
19	Daniel Mcferron	50	Hired Man	Laborer	Michigan
20	Jake Bogusce	55	Hired Man	Laborer	Michigan
21	John Breen	55	Head	Farmer	Pennsylvania
22	Nellie Breen	52	Wife-H	—	Michigan
23	Wilfred Breen	20	Son	Laborer	Michigan
24	James Breen	18	Son	Laborer	Michigan
25	Anna Breen	16	Daughter	—	Michigan
26	Margaret Breen	12	Daughter	—	Michigan
27	Lucille Breen	9	Daughter	—	Michigan
28	Harold Breen	7	Son	—	Michigan
29	Earl Cullone	33	Head	Farmer	Michigan
30	Frances Cullone	26	Wife-H	—	Michigan
31	William Cullone	3	Son	—	Michigan
32	Frances Jean Cullone	2	Daughter	—	Michigan
33	Nola Cullone	60	Mother	—	Michigan
34	Raymond Lepinski	16	Boarder	—	Kentucky
35	Edward Lepinski	12	Boarder	—	Michigan
36	Milton Buhldan	15	Boarder	—	Michigan
37	William Abramczyk	5	Boarder	—	Michigan
38	Joseph Ryzotabski	5	Boarder	—	Michigan
39	George Clark	46	Head	Farmer	Michigan
40	Ella Clark	38	Wife-H	—	Michigan
41	Edward Clark	5	Son	—	Michigan
42	Frances Clark	2	Son	—	Michigan
43	Edward Mcgill	54	Head	Farmer	Michigan
44	John Urka	53	Head	Laborer	Hungary
45	Patrick Craven	56	Head	Farmer	Michigan
46	Alice Craven	19	Niece-H	—	Illinois
47	Dennis Ryan	52	Head	Farmer	Michigan
48	Mary Gleason	67	O	Farmer	Michigan
49	Dennis Gleason	32	Son	Laborer	Michigan
50	Daniel Gleason	27	Son	Laborer	Michigan

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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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