MK
Mary Koch — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Kittitas, Washington
Our Model Tree links this Mary Koch across the 1900 and 1910 US Censuses in Kittitas, Washington (XGBoost, ~Confirmed) — first a daughter (b.~1890), then head of a 7-person household.
Age 10
b. ~1890
Female
Daughter
Born: Washington
Single
1900 Census Record Details
| Census Year | 1900 |
| Location | Kittitas, Washington |
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Washington |
| Birth Month | Oct |
| Birth Year | 1890 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Township / Ward | Swauk Precinct |
| Est. Birth Year | ~1890 |
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 1900 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Teora Koch | Daughter | — | 16 | ~1884 |
| Edward Koch | Son | — | 7 | ~1893 |
| Mary Koch | Daughter | — | 10 | ~1890 |
| Ruby Koch | Daughter | — | 13 | ~1887 |
| George Koch | Head | — | 58 | ~1842 |
| Gilbert Koch | Son | — | 20 | ~1880 |
| Rosa Koch | Spouse | — | 47 | ~1853 |
Census Appearances
1900
Kittitas, Washington
Daughter, age 10
Kittitas, Washington · implied b. ~1890 — 7 household members
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Washington |
| Birth Month | Oct |
| Birth Year | 1890 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1910
Kittitas, Washington
Daughter, age 19
Kittitas, Washington · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | Marie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Germany |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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.
Our Model Tree links Mary Koch across 2 US Census years (1900 and 1910) in Kittitas, Washington, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Koch
Daughter · 1900 · age 10 · b. ~1890 · Washington
★ You are viewing this record
Sibling
Gilbert Koch
Sibling · 1900 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Koch
Sibling · 1900 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Teora Koch
Sibling · 1900 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby Koch
Sibling · 1900 · age 13
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
1900 US Federal Census — Kittitas, Washington
Open full size
1900 US Federal Census — Kittitas, Washington
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu1746unit:0235)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Alfred Evans | 27 | Son | — | Washington |
| 52 | Ada P Evans | 25 | Daughter | — | Washington |
| 53 | Rica I Evans | 23 | Daughter | — | Washington |
| 54 | John S Vader | 50 | Head | Farmer | New York |
| 55 | Elizabeth Vader | 55 | Wife | — | Maine |
| 56 | Clarence Morris | 17 | Boarder | Coal Miner | Pennsylvania |
| 57 | Benjamin Price | 44 | Head | Farmer | Illinois |
| 58 | Dicey Price | 39 | Wife | — | West Virginia |
| 59 | George Price | 16 | Son | Farm Laborer | Minnesota |
| 60 | Lulu Price | 14 | Daughter | — | Washington |
| 61 | Pearl Price | 12 | Daughter | — | Washington |
| 62 | Ray Price | 9 | Son | — | Washington |
| 63 | Lester Price | 7 | Daughter | — | Washington |
| 64 | John Price | 5 | Son | — | Washington |
| 65 | Edith Price | 2 | Daughter | — | Washington |
| 66 | John P Wilson | 56 | Head | Farmer | Iowa |
| 67 | Rebecca Wilson | 51 | Wife | — | Iowa |
| 68 | Amos Rudolph | 48 | Head | Farmer | Germany |
| 69 | Jesse Powers | 26 | Head | Farmer | Oregon |
| 70 | Goldie Powers | 20 | Wife | — | Missouri |
| 71 | Bertha Powers | 0 | Daughter | — | Washington |
| 72 | Margaret Powers | 59 | Mother | — | North Carolina |
| 73 | Joseph Benerleit | 62 | Head | Farmer | Germany |
| 74 | T Benerleit | 58 | Wife | — | Germany |
| 75 | Waldamar Benerleit | 29 | Son | Farm Laborer | Germany |
| 76 | Martha Benerleit | 16 | Daughter | — | Germany |
| 77 | Liddy Durnwenter | 24 | Daughter | — | Germany |
| 78 | Charles Durnwenter | 27 | Son-in-law | Farm Laborer | Germany |
| 79 | David Grace | 55 | Head | Farmer | Missouri |
| 80 | Amanda Grace | 49 | Wife | — | Missouri |
| 81 | John Grace | 26 | Son | — | Oregon |
| 82 | George Grace | 23 | Son | Farm Laborer | Oregon |
| 83 | Burton Grace | 19 | Son | Farm Laborer | Oregon |
| 84 | Clara S Grace | 15 | Daughter | — | Oregon |
| 85 | Ralph Grace | 13 | Son | — | Oregon |
| 86 | Gustaf Nilson | 61 | Boarder | Gold Miner | Sweden |
| 87 | Edward Auvand | 47 | Head | House Carpenter | Illinois |
| 88 | Elsie Auvand | 35 | Wife | — | Iowa |
| 89 | Ethel Auvand | 10 | Daughter | — | Iowa |
| 90 | Enmilda Auvand | 9 | Daughter | — | Washington |
| 91 | George Koch | 58 | Head | Farmer | Germany |
| 92 | Rosa Koch | 46 | Wife | — | Ohio |
| 93 | Gilbert Koch | 19 | Son | Farm Laborer | Kansas |
| 94 | Teora Koch | 15 | Daughter | — | Washington |
| 95 | Ruby Koch | 13 | Daughter | — | Washington |
| 96 | Mary Koch THIS PERSON | 9 | Daughter | — | Washington |
| 97 | Edward Koch | 7 | Son | — | Washington |
| 98 | Scott Knight | 58 | Head | Farmer | Indiana |
| 99 | Abraham Knight | 39 | Son | Farm Laborer | Nebraska |
| 100 | Russell Knight | 25 | Son | Farm Laborer | Texas |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1900 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)