Mary Sullivan — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Houghton-County, Michigan

Our Model Tree links this Mary Sullivan across the 1920, 1930 and 1940 US Censuses in Houghton-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 5-person household.

Age 56 b. ~1884 Female Head Born: Michigan Widowed

1940 Census Record Details

Census Year	1940
Location	Houghton-County, Michigan
Surname	Sullivan
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	56
Marital Status	Widowed
Birthplace	Michigan
1935 Residence (City)	Laird village
1935 Residence (County)	Houghton
Additional Details
Class of Worker	0
Highest Grade	C-1
1935 Residence	Same place
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan
Township / Ward	Laird Village
Est. Birth Year	~1884

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 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Sullivan	Daughter	—	31	~1909
Mary Sullivan	Head	—	56	~1884
Margaret Sullivan	Other	—	50	~1890
Anna Sullivan	Other	—	57	~1883
John Sullivan	Son	—	33	~1907

Census Appearances

1920

Houghton, Michigan

Other, age 34

Houghton, Michigan · implied b. ~1886 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Sullivan
Given Name	Mary A
Relationship to Head	Sister
Sex	F
Color / Race	White
Age	34
Marital Status	Single
Birthplace	Michigan
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Irish
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

1930

Houghton, Michigan

Other, age 45

Houghton, Michigan · implied b. ~1885 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Sullivan
Given Name	Mary
Relationship to Head	Head-H
Sex	F
Color / Race	White
Age	45
Marital Status	Widowed
Birthplace	Michigan
Age at First Marriage	22
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	350
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

1940

Houghton-County, Michigan

Head, age 56

Houghton-County, Michigan · implied b. ~1884 — 5 household members

Surname	Sullivan
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	56
Marital Status	Widowed
Birthplace	Michigan
1935 Residence (City)	Laird village
1935 Residence (County)	Houghton
Class of Worker	0
Highest Grade	C-1
1935 Residence	Same place
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

Model Tree

Linked across censuses

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

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This person

Anchor record

Mary Sullivan

Head · 1940 · age 56 · b. ~1884 · Michigan

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

Original Census Page

1940 US Federal Census — Houghton-County, Michigan Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01756-00255)

Line	Name	Age	Relation	Occupation	Birthplace
41	Nile Bush	42	Head	Crane Operator	Michigan
42	Earl Bush	14	Son	—	Michigan
43	Robert Bush	7	Son	—	Michigan
44	Mary Sullivan THIS PERSON	56	Head	—	Michigan
45	John C. Sullivan	33	Son	Crane Operator	Michigan
46	Mary Sullivan	31	Daughter	—	Michigan
47	Anna Sullivan	57	Sister	Operator	Michigan
48	Margaret Sullivan	50	Sister	—	Michigan
49	Victor Viitala	36	Head	Blaster	Michigan
50	Elma Viitala	34	Wife	—	Michigan
51	Norma Viitala	10	Daughter	—	Michigan
52	Aileen Viitala	9	Daughter	—	Michigan
53	Florence Viitala	8	Daughter	—	Michigan
54	Donald Viitala	4	Son	—	Michigan
55	Donald Viitala	4	Son	—	Michigan
56	Gordon Viitala	2	Son	—	Michigan
57	Frank Erats	40	Head	Blacksmith	Arizona
58	Julia Erats	34	Wife	—	Germany
59	Leonard Erats	17	Son	Woodsman	Michigan
60	Lawrence Erats	15	Son	—	Michigan
61	Frank Erats	11	Son	—	Michigan
62	Juanita Erats	9	Daughter	—	Michigan
63	Dolores Erats	2	Daughter	—	Michigan
64	Elizabeth Pepin	26	Sister-in-law	Seamstress	Michigan
65	Nick Sitkaka	44	Head	Miner	Finland
66	Anna Sitkaka	72	Mother	—	Finland
67	Alfred Allen	38	Head	Blacksmith	Michigan
68	Mildred Allen	33	Wife	—	Michigan
69	William Allen	9	Son	—	Michigan
70	Jean Allen	8	Daughter	—	Michigan
71	Anthony Shager	32	Head	Fireman	Michigan
72	June Shager	25	Wife	—	Michigan
73	David Shager	6	Son	—	Michigan
74	Catherine Shager	73	Mother	—	Michigan
75	Arthur Nelson	31	Head	Laborer	Michigan
76	Marie Nelson	26	Wife	—	Michigan
77	Bradley Nelson	5	Son	—	Michigan
78	Peter Schreiley	45	Head	—	Germany
79	Gerhart Schreiley	32	Son	Filing Lumber	Germany
80	Martha Schreiley	21	Daughter	—	Germany

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About This Record & Model Tree

This record was independently indexed by YourRoots from the 1940 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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