Mary Harrington — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Mitchell-County, Iowa

Our Model Tree links this Mary Harrington across the 1920, 1930 and 1940 US Censuses in Mitchell-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1859), then head of a 2-person household.

Age 81 b. ~1859 Female Head Born: Wisconsin Widowed

1940 Census Record Details

Census Year	1940
Location	Mitchell-County, Iowa
Surname	Harrington
Given Name	Mary J.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	81
Marital Status	Widowed
Birthplace	Wisconsin
1935 Residence (City)	Mitchell
1935 Residence (County)	Mitchell
Additional Details
Class of Worker	0
Hours Worked	0
Highest Grade	8
1935 Residence	Same place
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin
Township / Ward	Mitchell
Est. Birth Year	~1859

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 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Harrington	Head	—	81	~1859
Robert Harrington	Son	—	53	~1887

Census Appearances

1920

Mitchell, Iowa

Head, age 61

Mitchell, Iowa · implied b. ~1859 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Harrington
Given Name	Mary J.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	61
Marital Status	Widowed
Birthplace	Wisconsin
Father's Birthplace	England
Mother's Birthplace	England
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	O
Home Free/Mortgaged	F
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1930

Mitchell, Iowa

Other, age 71

Mitchell, Iowa · implied b. ~1859 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Harrington
Given Name	Mary
Relationship to Head	Head-H
Sex	F
Color / Race	White
Age	71
Marital Status	Widowed
Birthplace	Wisconsin
Age at First Marriage	24
Father's Birthplace	England
Mother's Birthplace	England
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	1200
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1940

Mitchell-County, Iowa

Head, age 81

Mitchell-County, Iowa · implied b. ~1859 — 2 household members

Surname	Harrington
Given Name	Mary J.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	81
Marital Status	Widowed
Birthplace	Wisconsin
1935 Residence (City)	Mitchell
1935 Residence (County)	Mitchell
Class of Worker	0
Hours Worked	0
Highest Grade	8
1935 Residence	Same place
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

Model Tree

Linked across censuses

Our Model Tree links Mary Harrington 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 Harrington

Head · 1940 · age 81 · b. ~1859 · Iowa

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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 — Mitchell-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01183-00584)

Line	Name	Age	Relation	Occupation	Birthplace
1	Duvalle	39	Roomer	Teacher	Canada
2	Oscar A. Nichols	69	Head	—	Iowa
3	Anna M. Nichols	52	Wife	—	Wisconsin
4	Helen N. Nichols	17	Daughter	—	Minnesota
5	Harold S. Nichols	15	Nephew	—	Minnesota
6	Mary J. Harrington THIS PERSON	81	Head	—	Wisconsin
7	Robert B. Harrington	53	Son	Contractor	Iowa
8	Frederick H. Chandler	81	Head	—	Illinois
9	Joseph Randall	27	Head	Instructor	Minnesota
10	Margaret S. Randall	22	Wife	—	Iowa
11	Jerry M. Randall	4	Son	—	Iowa
12	Joseph Becker	60	Head	Gardener	Czechoslovakia
13	Albina Becker	60	Wife	—	Czechoslovakia
14	John C. Becker	17	Son	Surveyor	New York
15	Charles S. Graves	30	Head	Bus Driver	Iowa
16	Esther N. Graves	30	Wife	—	Iowa
17	Merlin L. Graves	6	Son	—	Iowa
18	Dean A. Graves	3	Son	—	Iowa
19	Larry D. Graves	1	Son	—	Iowa
20	Peter S. Klein	67	Head	Caretaker	Germany
21	Christina Klein	67	Wife	—	Romania
22	Lewis D. Hungerford	51	Head	Salesman	Minnesota
23	Irma K. Hungerford	28	Wife	—	Iowa
24	Dorothy J. Hungerford	18	Daughter	—	Iowa
25	Ruth A. Hungerford	13	Daughter	—	Iowa
26	Lawrence D. Jr. Hungerford	11	Son	—	Iowa
27	Herbert W. Frank	36	Head	Partner	Kansas
28	Doris E. Frank	31	Wife	Clerk	Iowa
29	Lewis B. Novak	24	Head	Truck Driver	Iowa
30	Myrtle R. Novak	21	Wife	—	Iowa
31	Barbara J. Novak	1	Daughter	—	Iowa
32	Frances Novak	55	Mother	—	Czechoslovakia
33	Joseph F. Curin	69	Head	—	Wisconsin
34	Barbara Curin	54	Wife	—	Wisconsin
35	Frank J. Curin	29	Son	Laborer	Wisconsin
36	England Mary Curin	26	Daughter	Housework	Wisconsin
37	Geraldine Curin	11	Granddaughter	—	Iowa
38	Olga E. Schmidt	47	Head	Seamstress	Iowa
39	Albert E. Turner	60	Head	Laborer	Iowa
40	Hattie B. Turner	46	Wife	—	Iowa

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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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