MK
Mary Koch — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Ellis, Oklahoma
Our Model Tree links this Mary Koch across the 1930 and 1940 US Censuses in Ellis, Oklahoma (XGBoost, ~Confirmed) — first a spouse (b.~1883), then head of a 7-person household.
Age 47
b. ~1883
Female
Spouse
Born: Russia
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Ellis, Oklahoma |
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Age at First Marriage | 29 |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Additional Details | |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
| Township / Ward | Otis Township |
| Est. Birth Year | ~1883 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Maggie Koch | Daughter | — | 11 | ~1919 |
| Mary Koch | Spouse | — | 47 | ~1883 |
| Hulda Koch | Son | — | 16 | ~1914 |
| Paul Koch | Son | — | 9 | ~1921 |
| Katie Koch | Other | — | 74 | ~1856 |
| Almi Koch | Daughter | — | 14 | ~1916 |
| Michael Koch | Head | — | 44 | ~1886 |
Census Appearances
1930
Ellis, Oklahoma
Spouse, age 47
Ellis, Oklahoma · implied b. ~1883 — 7 household members
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Age at First Marriage | 29 |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1940
Ellis-County, Oklahoma
Spouse, age 57
Ellis-County, Oklahoma · implied b. ~1883 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | Marie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Otis Township |
| 1935 Residence (County) | Ellis |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
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 (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Koch
Spouse · 1930 · age 47 · b. ~1883 · Oklahoma
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Ellis, Oklahoma
Open full size
1930 US Federal Census — Ellis, Oklahoma
Page Contents
50 people indexed on this census page (ia:1930:15thcensus1901unit:0486)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Lillie E Weirns | 25 | Wife | — | Texas |
| 52 | Francis L Weirns | 5 | Daughter | — | Colorado |
| 53 | Alberta Weirns | 2 | Daughter | — | Texas |
| 54 | Thomas W Weirns | 1 | Son | — | Texas |
| 55 | Sam J Longhofer | 27 | Head | Laborer | Oklahoma |
| 56 | Martha Longhofer | 25 | Wife | — | Oklahoma |
| 57 | Edna Longhofer | 7 | Daughter | — | Oklahoma |
| 58 | Hazel Longhofer | 6 | Son | — | Oklahoma |
| 59 | Roland Longhofer | 4 | Son | — | Oklahoma |
| 60 | Theodore Longhofer | 2 | Son | — | Texas |
| 61 | Wilbert Longhofer | 2 | Son | — | Nebraska |
| 62 | Homer Mccarter | 45 | Head | Farmer | Missouri |
| 63 | Maggie Mccarter | 37 | Wife | — | Indiana |
| 64 | Rolland R Mccarter | 9 | Son | — | Oklahoma |
| 65 | Phallon Rolland Mccarter | 69 | Father-in-law | Laborer | Indiana |
| 66 | Conrad Stoner | 34 | Head | Farmer | Russia |
| 67 | Anna Stoner | 27 | Wife | — | Russia |
| 68 | Fredrick Stoner | 26 | Son | Laborer | Oklahoma |
| 69 | Willie Stoner | 24 | Son | Laborer | Oklahoma |
| 70 | Isaac Stoner | 22 | Son | Teacher | Oklahoma |
| 71 | Hulda Stoner | 19 | Daughter | — | Oklahoma |
| 72 | Leah E Stoner | 17 | Daughter | — | Oklahoma |
| 73 | Hans Stoner | 15 | Son | — | Oklahoma |
| 74 | Lydia Stoner | 10 | Daughter | — | Oklahoma |
| 75 | Ralph F Dilger | 40 | Head | Farmer | Iowa |
| 76 | Hazel J Dilger | 36 | Wife | — | Iowa |
| 77 | Laura M Dilger | 15 | Daughter | — | Oklahoma |
| 78 | Lydia W Dilger | 13 | Daughter | — | Oklahoma |
| 79 | Adam Herber | 64 | Head | Farmer | Russia |
| 80 | Lucy E Herber | 60 | Wife | — | Russia |
| 81 | Fredrick Herber | 25 | Son | Laborer | Oklahoma |
| 82 | Willie Herber | 19 | Son | Laborer | Oklahoma |
| 83 | Emma Herber | 18 | Daughter-in-law | — | Oklahoma |
| 84 | Enos Herber | 12 | Son | — | Oklahoma |
| 85 | Birdena Mcmahan | 42 | Head | Laborer | Iowa |
| 86 | Gottfried Meckle | 56 | Head | Farmer | Russia |
| 87 | Elizabeth Meckle | 44 | Wife | — | Russia |
| 88 | Michael M Koch | 44 | Head | Farmer | Russia |
| 89 | Mary Koch THIS PERSON | 47 | Wife | — | Russia |
| 90 | Hulda Koch | 16 | Son | Laborer | Oklahoma |
| 91 | Almi Koch | 14 | Daughter | — | New Mexico |
| 92 | Maggie Koch | 11 | Daughter | — | New Mexico |
| 93 | Paul Koch | 9 | Son | — | New Mexico |
| 94 | Katie Koch | 74 | Mother | — | Russia |
| 95 | Jacob J Reisig | 47 | Head | Farmer | Russia |
| 96 | Rosa S Reisig | 40 | Wife | — | Russia |
| 97 | Alvin A Reisig | 18 | Son | Laborer | Oklahoma |
| 98 | Leo C Reisig | 17 | Son | — | Oklahoma |
| 99 | Willie Reisig | 14 | Son | — | Oklahoma |
| 100 | Reisig | 5 | Son | — | Oklahoma |
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)