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Mary Koch — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Hennepin, Minnesota

Our Model Tree links this Mary Koch across the 1930 and 1940 US Censuses in Hennepin, Minnesota (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 5-person household.

Age 7 b. ~1923 Female Daughter Born: Minnesota Single

1930 Census Record Details

Census Year1930
LocationHennepin, Minnesota
SurnameKoch
Given NameMary E
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age7
Marital StatusSingle
BirthplaceMinnesota
Father's BirthplaceMinnesota
Mother's BirthplaceMinnesota
Additional Details
Occupationnone
Can Read/WriteYes
Birth StateMinnesota
Birth CountryUnited States
Birthplace (normalized)minnesota
Township / WardBrooklyn Center Village
Est. Birth Year~1923

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 1930 census.

Name Relation to head Relative to Mary Age Birth yr
Kathryn Koch Daughter — 5 ~1925
Leo Koch Head — 34 ~1896
Anna Koch Spouse — 34 ~1896
Mary Koch Daughter — 7 ~1923
Lois Koch Daughter — 2 ~1928

Census Appearances

1930
Hennepin, Minnesota
Daughter, age 7
Hennepin, Minnesota · implied b. ~1923 — 5 household members
Surname Koch
Given Name Mary E
Relationship to Head Daughter
Sex F
Color / Race White
Age 7
Marital Status Single
Birthplace Minnesota
Father's Birthplace Minnesota
Mother's Birthplace Minnesota
Occupation none
Can Read/Write Yes
Birth State Minnesota
Birth Country United States
Birthplace (normalized) minnesota
1940
Hennepin-County, Minnesota
Daughter, age 18
Hennepin-County, Minnesota · implied b. ~1922 — 2 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Couch
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 18
Marital Status Single
Birthplace Minnesota
1935 Residence (City) Minneapolis City
1935 Residence (County) Hennepin
Class of Worker O
Highest Grade Hs 3
1935 Residence Same place
Birth State Minnesota
Birth Country United States
Birthplace (normalized) minnesota

Model Tree

An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Linked across censuses
Our Model Tree links Mary Koch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Koch
Daughter · 1930 · age 7 · b. ~1923 · Minnesota
★ You are viewing this record
Sibling
Lois Koch
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Koch
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1930 US Federal Census — Hennepin, Minnesota Open full size

Page Contents

50 people indexed on this census page (ia:1930:minnesotacensus00reel1088:0674)

Line Name Age Relation Occupation Birthplace
51 Theodore D Hamilton 44 Head Sales Assistant Minnesota
52 Anna E Hamilton 46 Wife None Minnesota
53 Gordon H Hamilton 15 Son None Minnesota
54 Dora Evans 4 Niece None Iowa
55 Chris A Peterson 39 Head Farmer Sweden
56 Martha W Peterson 46 Wife None New York
57 Edwin E Peterson 11 Son None Illinois
58 Mathilda Peterson 80 Mother None Sweden
59 Leo A Koch 34 Head Laborer Minnesota
60 Anna E Koch 34 Wife None Minnesota
61 Mary E Koch THIS PERSON 7 Daughter None Minnesota
62 Kathryn A Koch 5 Daughter None Minnesota
63 Lois M Koch 2 Daughter None Minnesota
64 Carl Malm 41 Head Tailor Sweden
65 Helga Malm 41 Wife None Sweden
66 Arthur Malm 18 Son Messenger Sweden
67 Herbert Malm 13 Son None Minnesota
68 Lillian Malm 8 Daughter None Minnesota
69 Mike Boneff 45 Head Farmer Bulgaria
70 Flora Boneff 31 Wife None Canada English
71 Lawrence Boneff 14 Son None Canada English
72 Pearl Boneff 13 Daughter None Canada English
73 Dan Karoff 53 Head Farmer Bulgaria
74 John Nedeloff 36 Servant Laborer Bulgaria
75 Nick Lousoff 45 Servant Laborer Bulgaria
76 Erick G Ryden 47 Head Farmer Sweden
77 Judith R Ryden 31 Wife None Sweden
78 Elizabeth M Ryden 6 Daughter None Minnesota
79 Irene E Ryden 5 Daughter None Minnesota
80 Doris Ryden 2 Daughter None Minnesota
81 Mabel L Erickson 20 Servant Housekeeper Minnesota
82 Howard Carlson 18 Servant Laborer Sweden
83 Herbert Neid 27 Servant Laborer New York
84 Gust Anderson 39 Head Farmer Sweden
85 Annie Anderson 36 Wife None Sweden
86 Gerald Anderson 2 Son None Sweden
87 John Ryden 65 Head Farmer Sweden
88 Almira Ryden 57 Wife None Sweden
89 Carl Erickson 26 Nephew Laborer Minnesota
90 Esther V Ryden 27 Daughter Bookkeeper Minnesota
91 Stanley E Edling 32 Head Laborer Minnesota
92 Ruth V Edling 29 Wife None Minnesota
93 Virginia A Edling 2 Daughter None Minnesota
94 Aaron Schendel 54 Head Labor Foreman Minnesota
95 Mary A Schendel 48 Wife None Minnesota
96 Herbert E Schendel 12 Son None Minnesota
97 Calvin E Schendel 10 Son None Minnesota
98 Marie E Schendel 8 Daughter None Minnesota
99 Katherine E Schendel 5 Daughter None Minnesota
100 Lorraine E Schendel 5 Daughter None Minnesota

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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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