Martha Brown — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Polk-County, Iowa

Our Model Tree links this Martha Brown across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 6-person household.

Age 38 b. ~1902 Female Spouse Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Polk-County, Iowa
Surname	Brown
Given Name	Martha E
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	38
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Des Moines City
1935 Residence (County)	Polk
Additional Details
Industry	Maid
Class of Worker	Private home
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Township / Ward	Des Moines City
Est. Birth Year	~1902

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.

6 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to Martha	Age	Birth yr
Lois Brown	Daughter	—	21	~1919
Phyllis Brown	Daughter	—	14	~1926
Wm Brown	Head	—	43	~1897
Clarence Brown	Son	—	19	~1921
Leonard Brown	Son	—	18	~1922
Martha Brown	Spouse	—	38	~1902

Census Appearances

1920

Polk, Iowa

Spouse, age 18

Polk, Iowa · implied b. ~1902 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Brown
Given Name	Martha
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	18
Marital Status	Married
Birthplace	Iowa
Father's Birthplace	Ohio
Mother's Birthplace	Missouri
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Polk, Iowa

Spouse, age 28

Polk, Iowa · implied b. ~1902 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Brown
Given Name	Martha E
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	28
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	16
Father's Birthplace	Ohio
Mother's Birthplace	Missouri
Can Read/Write	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Polk-County, Iowa

Spouse, age 38

Polk-County, Iowa · implied b. ~1902 — 6 household members

Surname	Brown
Given Name	Martha E
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	38
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Des Moines City
1935 Residence (County)	Polk
Industry	Maid
Class of Worker	Private home
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Linked across censuses

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

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This person

Anchor record

Martha Brown

Spouse · 1940 · age 38 · b. ~1902 · 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-t0627-01195-01122)

Line	Name	Age	Relation	Occupation	Birthplace
1	William W Rintner	59	Head	—	Ohio
2	Genevieve Rintner	50	Wife	—	Iowa
3	Mike Leo	57	Head	Laborer	Italy
4	Lena Leo	51	Wife	—	Italy
5	Domino Leo	27	Son	Waiting Student	Iowa
6	Evelyn Leo	23	Daughter	Clerical Work	Iowa
7	Anthony Leo	19	Son	Mach Operator	Iowa
8	Mike Jr Leo	21	Son	Salesman	Iowa
9	Walter Morris	40	Head	Laborer	Iowa
10	Emma Morris	38	Wife	—	Iowa
11	Elizabeth Morris	18	Daughter	—	Iowa
12	Frederick Morris	10	Son	—	California
13	Shirley Ann Morris	6	Daughter	—	Iowa
14	Alex Monaco	35	Head	Truck Driver	Pennsylvania
15	Dorothy Monaco	33	Wife	—	Iowa
16	Edward Monaco	10	Son	—	Iowa
17	Dorothy Monaco	7	Daughter	—	Iowa
18	Tom Mcbroom	65	Head	—	Pennsylvania
19	Nora Mcbroom	42	Wife	—	New York
20	Josephine Kenzlerich	62	Head	—	Austria
21	Peter J Kenzlerich	25	Son	Truck Driver	Iowa
22	John Jr Metrakovich	36	Head	Printer	Iowa
23	Anna D Metrakovich	32	Wife	—	Iowa
24	John Jr Metrakovich	12	Son	—	Iowa
25	Bernard Metrakovich	8	Son	—	Iowa
26	Charles Devore	37	Head	Warehouse Mgr.	Illinois
27	Marie Devore	31	Wife	—	Iowa
28	Charles K Devore	16	Son	Assistant To Father	Iowa
29	Henry Dyer	76	Head	—	Iowa
30	Hettie Dyer	72	Wife	—	Wisconsin
31	Wm C Brown	43	Head	Laborer	Iowa
32	Martha E Brown THIS PERSON	38	Wife	—	Iowa
33	Lois Brown	21	Daughter	Truck Driver	Iowa
34	Clarence Brown	19	Son	Carpenter Helper	Iowa
35	Leonard Brown	18	Son	—	Iowa
36	Phyllis Brown	14	Daughter	—	Iowa
37	Thomas J Woodyard	21	Head	Stationary Eng.	Iowa
38	Pearl Woodyard	28	Wife	—	Iowa
39	Lillian Mcnally	58	Mother	—	Iowa
40	Frank Aird	27	Head	Buyer	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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