Margaret Cox — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Polk-County, Iowa

Our Model Tree links this Margaret Cox across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 4-person household.

Age 59 b. ~1881 Female Head Born: Iowa Widowed

1940 Census Record Details

Census Year	1940
Location	Polk-County, Iowa
Surname	Cox
Given Name	Margaret
Relationship to Head	Head
Sex	F
Color / Race	White
Age	59
Marital Status	Widowed
Birthplace	Iowa
1935 Residence (City)	Des Moines City
1935 Residence (County)	Polk
Additional Details
Class of Worker	0
Highest Grade	C 8
1935 Residence	Same Place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Township / Ward	Des Moines City
Est. Birth Year	~1881

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 1940 census.

Name	Relation to head	Relative to Margaret	Age	Birth yr
Pauline Cox	Daughter	—	20	~1920
Helen Cox	Daughter	—	23	~1917
Hazel Cox	Daughter	—	24	~1916
Margaret Cox	Head	—	59	~1881

Census Appearances

1920

Warren, Iowa

Spouse, age 38

Warren, Iowa · implied b. ~1882 — 9 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	Myrtle S
Relationship to Head	wife
Sex	F
Color / Race	White
Age	38
Marital Status	Married
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Ohio
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Polk, Iowa

Spouse, age 48

Polk, Iowa · implied b. ~1882 — 11 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	Myrtle
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	48
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	21
Father's Birthplace	Iowa
Mother's Birthplace	Ohio
Can Read/Write	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Polk-County, Iowa

Head, age 59

Polk-County, Iowa · implied b. ~1881 — 4 household members

Surname	Cox
Given Name	Margaret
Relationship to Head	Head
Sex	F
Color / Race	White
Age	59
Marital Status	Widowed
Birthplace	Iowa
1935 Residence (City)	Des Moines City
1935 Residence (County)	Polk
Class of Worker	0
Highest Grade	C 8
1935 Residence	Same Place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Linked across censuses

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

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This person

Anchor record

Margaret Cox

Head · 1940 · age 59 · b. ~1881 · 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 — Polk-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01196-00941)

Line	Name	Age	Relation	Occupation	Birthplace
1	David R. Cullin	70	Head	Bricklayer	Holland
2	Bertha S. Cullin	67	Wife	—	Iowa
3	Edward De Gorde	34	Head	Iceman	Colorado
4	Thelma De Gorde	35	Wife	—	Iowa
5	Kurt De Gorde	8	Son	—	Iowa
6	Elmo J. Norris	47	Head	Janitor	Iowa
7	Coy Norris	46	Wife	Cook	Missouri
8	Robert F. Norris	19	Son	Packer Boy	Iowa
9	William C. Norris	17	Son	—	Iowa
10	Floyd R. Phillips	40	Head	Iron Worker	Iowa
11	Stella B. Phillips	39	Wife	—	Iowa
12	Marjorie Phillips	18	Daughter	—	Iowa
13	Neil S. Jepsen	69	Head	—	Denmark
14	Caroline Jepsen	70	Wife	—	Iowa
15	Lene W. Christensen	49	Head	—	Minnesota
16	Leland W. Christensen	26	Son	Glove Packer	Minnesota
17	Virgil L. Christensen	21	Son	Iceman	Minnesota
18	Charlotte Christensen	15	Daughter	—	Iowa
19	Lois Christensen	13	Daughter	—	Iowa
20	Harlan Christensen	5	Son	—	Iowa
21	Edward Janisch	58	Head	Conductor	Iowa
22	Laura M. Janisch	54	Wife	—	Iowa
23	Daniel A. Janisch	19	Son	Radio Ex.	Iowa
24	Margaret Cox THIS PERSON	59	Head	—	Iowa
25	Hazel Cox	24	Daughter	Saleslady	Iowa
26	Helen Cox	23	Daughter	Stenographer	Iowa
27	Pauline Cox	20	Daughter	Stenographer	Iowa
28	Hazel Anderson	45	Head	Book Keeper	Iowa
29	Wesley Anderson	43	Brother	Mechanic	Iowa
30	Donald Rogers	30	Head	Salesman	Iowa
31	Melva Rogers	23	Wife	—	Iowa
32	Donna L. Rogers	0	Daughter	—	Iowa
33	William C. Smith	30	Head	Salesman	Iowa
34	Juanita Smith	27	Wife	—	Missouri
35	John W. Smith	2	Son	—	Iowa
36	Edward J. Weiss	26	Head	Painter	Kansas
37	Reda Weiss	25	Wife	—	Iowa
38	Olive Tenna	40	Head	Cook	Illinois
39	Inez Mathews	59	Head	Landlady	Illinois
40	Luray Bolen	8	Grd. daughter	—	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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