MO
Mary Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Butler-County, Kansas
Our Model Tree links this Mary Olsen across the 1930 and 1940 US Censuses in Butler-County, Kansas (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 6-person household.
Age 14
b. ~1926
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Butler-County, Kansas |
| Surname | Olsen |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Chelsea Township |
| 1935 Residence (County) | Butler |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Chelsea Township |
| Est. Birth Year | ~1926 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Olsen | Daughter | — | 14 | ~1926 |
| George Olsen | Son | — | 21 | ~1919 |
| George Olsen | Head | — | 56 | ~1884 |
| Clarence Olsen | Son | — | 17 | ~1923 |
| Edna Olsen | Spouse | — | 51 | ~1889 |
| William Olsen | Son | — | 23 | ~1917 |
Census Appearances
1930
Butler, Kansas
Daughter, age 4
Butler, Kansas · implied b. ~1926 — 47 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Butler-County, Kansas
Daughter, age 14
Butler-County, Kansas · implied b. ~1926 — 6 household members
| Surname | Olsen |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Chelsea Township |
| 1935 Residence (County) | Butler |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Olsen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Olsen
Daughter · 1940 · age 14 · b. ~1926 · Kansas
★ You are viewing this record
Sibling
Clarence Olsen
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Olsen
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Olsen
Sibling · 1940 · age 23
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
1940 US Federal Census — Butler-County, Kansas
Open full size
1940 US Federal Census — Butler-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01222-00206)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Larry E Slea | 3 | Son | — | Kansas |
| 42 | Oren P Maddox | 37 | Head | Farm Laborer | Kansas |
| 43 | Blanch C Maddox | 31 | Wife | — | Kansas |
| 44 | Orea P Maddox | 12 | Daughter | — | Kansas |
| 45 | Billy G Maddox | 11 | Son | — | Kansas |
| 46 | Darrel P Maddox | 10 | Son | — | Kansas |
| 47 | John S Winn | 34 | Head | Farming | Kansas |
| 48 | John F Winn | 25 | Son | Home Helper | Kansas |
| 49 | J Henry Lingelbach | 69 | Head | Farmer | Missouri |
| 50 | Martha J Lingelbach | 63 | Wife | — | Missouri |
| 51 | Conrad M Wattenstrom | 52 | Head | Farmer | Kansas |
| 52 | Ralph E Wattenstrom | 55 | Brother | Farmer | Kansas |
| 53 | George L Olsen | 56 | Head | Farming | Kansas |
| 54 | Edna J Olsen | 51 | Wife | — | Kansas |
| 55 | William C Olsen | 23 | Son | Farm Laborer | Kansas |
| 56 | George K Olsen | 21 | Son | Farm Laborer | Kansas |
| 57 | Clarence E Olsen | 17 | Son | Farm Laborer | Kansas |
| 58 | Mary L Olsen THIS PERSON | 14 | Daughter | — | Kansas |
| 59 | George E Borger | 49 | Head | Farmer | Kansas |
| 60 | Edith A Borger | 48 | Wife | — | Kansas |
| 61 | Howard G Borger | 22 | Son | Farm Laborer | Kansas |
| 62 | Wendel W Borger | 20 | Son | Farm Laborer | Kansas |
| 63 | Eudine A Borger | 17 | Daughter | — | Kansas |
| 64 | Jimmie M Borger | 15 | Son | — | Kansas |
| 65 | Charles E Rhomeyer | 27 | Head | Farming | Kansas |
| 66 | Mary E Rhomeyer | 28 | Wife | — | Missouri |
| 67 | G George Bowers | 55 | Head | Farming | Australia |
| 68 | Wright W Bass | 46 | Friend | Farm Laborer | Kansas |
| 69 | Wilber E Countryman | 32 | Head | Farmer | Oklahoma |
| 70 | Virginia J Countryman | 29 | Wife | — | Kansas |
| 71 | Eugene Countryman | 3 | Son | — | Kansas |
| 72 | Millard B Countryman | 62 | Father | Farm Laborer | Iowa |
| 73 | Charles P Mitchel | 36 | Head | Farm Laborer | Oklahoma |
| 74 | Vera B Mitchel | 29 | Wife | — | Illinois |
| 75 | Norval M Breakey | 63 | Head | Farmer | Illinois |
| 76 | Leona A Breakey | 59 | Wife | — | Kansas |
| 77 | Loyd W-Ab Breakey | 21 | Son | Y.M.C.A. Out Leader | Kansas |
| 78 | Dan E Haines | 30 | Head | Farmer | Kansas |
| 79 | Dottie H Haines | 26 | Wife | — | Kansas |
| 80 | Jerrold E Haines | 5 | Son | — | Kansas |
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)