Mary Koch — 1910 US Census Record

Linked across censuses

1910 United States Federal Census · Grant, South Dakota

Our Model Tree links this Mary Koch across the 1900 and 1910 US Censuses in Grant, South Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1876), then head of a 7-person household.

Age 34 b. ~1876 Female Spouse Born: Minnesota Married

1910 Census Record Details

Census Year	1910
Location	Grant, South Dakota
Surname	Koch
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Minnesota
Years Married	15
Children Born	3
Children Living	3
Father's Birthplace	Germany
Mother's Birthplace	Germany
Additional Details
Can Read	Yes
Can Write	Yes
Speaks English	English
Birth State	Minnesota
Birth Country	United States
Birthplace (normalized)	minnesota
Township / Ward	Grant Center Township
Est. Birth Year	~1876

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.

7 people recorded at the same address in the 1910 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Elmer Berndes	Other	—	21	~1889
George Koch	Head	—	39	~1871
Marcellan Koch	Son	—	2	~1908
Melvin Koch	Son	—	12	~1898
Mary Koch	Spouse	—	34	~1876
Norma Koch	Daughter	—	7	~1903
Otto Kant	Other	—	22	~1888

Census Appearances

1900

Grant, South …

Spouse, age 24

Grant, South Dakota · implied b. ~1876 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Koch
Given Name	Mary F
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	24
Marital Status	Married
Birthplace	Minnesota
Birth Month	Jun
Birth Year	1876
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Minnesota
Birth Country	United States
Birthplace (normalized)	minnesota

1910

Grant, South …

Spouse, age 34

Grant, South Dakota · implied b. ~1876 — 7 household members

Surname	Koch
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Minnesota
Years Married	15
Children Born	3
Children Living	3
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read	Yes
Can Write	Yes
Speaks English	English
Birth State	Minnesota
Birth Country	United States
Birthplace (normalized)	minnesota

Model Tree

Linked across censuses

Our Model Tree links Mary Koch across 2 US Census years (1900 and 1910) in Grant, South Dakota, using XGBoost record linkage.

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This person

Anchor record

Mary Koch

Spouse · 1910 · age 34 · b. ~1876 · South Dakota

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

Original Census Page

1910 US Federal Census — Grant, South Dakota Open full size

Page Contents

50 people indexed on this census page (ia:1910:13thcensus1910po1480unit:0993)

Line	Name	Age	Relation	Occupation	Birthplace
1	Viola L Baker	21	Daughter	—	South Dakota
2	Emil Kaske	31	Hired man	Farm Laborer	Germany
3	George H Koch	39	Head	Farmer	Wisconsin
4	Mary Koch THIS PERSON	34	Wife	—	Minnesota
5	Melvin G Koch	12	Son	—	S Dakota
6	Norma L Koch	7	Daughter	—	S Dakota
7	Marcellan Koch	2	Son	—	S Dakota
8	Elmer Berndes	21	Hired man	Farm Laborer	Wisconsin
9	Otto Kant	22	Boarder	Farm Laborer	Wisconsin
10	Clarence G Brochard	25	Head	Minister	Minnesota
11	Elsie Brochard	25	Wife	—	Minnesota
12	Violet Brochard	2	Daughter	—	Minnesota
13	Charles Koch	44	Head	Farmer	Wisconsin
14	Emma Koch	29	Wife	—	S Dakota
15	Sadie Koch	17	Daughter	—	Minnesota
16	Grace Koch	12	Daughter	—	Minnesota
17	Verna Koch	1	Daughter	—	S Dakota
18	Thomas Tweed	25	Hired man	Farm Laborer	Iowa
19	Fred E Pratt	45	Head	Farmer	Wisconsin
20	Katherine Pratt	40	Wife	—	Minnesota
21	Louis E Pratt	19	Son	Farm Laborer	S Dakota
22	Carl Pratt	14	Son	Farm Laborer	S Dakota
23	Agnes Pratt	4	Daughter	—	S Dakota
24	Gustav C Runge	33	Head	Farmer	Minnesota
25	Lottie C Runge	33	Wife	—	Minnesota
26	George G Runge	7	Son	—	S Dakota
27	Frank Hill	30	Head	Farmer	Wisconsin
28	Martha B Hill	27	Wife	—	Minnesota
29	Malcolm G Hill	1	Son	—	S Dakota
30	August Kaske	30	Head	Farmer	Germany
31	Ida Kaske	31	Wife	—	Minnesota
32	Florence Kaske	7	Daughter	—	S Dakota
33	Elenora Kaske	5	Daughter	—	S Dakota
34	Elda Kaske	3	Daughter	—	Minnesota
35	Cora Kaske	2	Daughter	—	Minnesota
36	Marie Kaske	0	Daughter	—	S Dakota
37	Alice Hangha	21	Hired girl	Farm Laborer	Wisconsin
38	William F Trapp	37	Head	Farmer	Wisconsin
39	Mary F Trapp	30	Wife	—	S Dakota
40	Elsie M Trapp	13	Daughter	—	S Dakota
41	Arthur W Trapp	11	Son	—	S Dakota
42	Lyle N Trapp	8	Son	—	S Dakota
43	Wayne A Trapp	6	Son	—	S Dakota
44	Eldred R Trapp	4	Son	—	S Dakota
45	Leon Gsaika	28	Hired man	—	Austria Pol
46	Archibald Templeton	57	Head	Farmer	Scotland
47	Betsy Templeton	53	Wife	—	Michigan
48	Annie Jean Templeton	26	Daughter	Teacher	S Dakota
49	George H Trapp	40	Head	Farmer	Wisconsin
50	Amelia Trapp	38	Wife	—	Minnesota

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About This Record & Model Tree

This record was independently indexed by YourRoots from the 1910 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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