MO
Mary Olsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Mary Olsen across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Female
Daughter
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Olsen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1922 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jack Olsen | Son | — | 10 | ~1930 |
| Richard Olsen | Son | — | 14 | ~1926 |
| Betty Olsen | Daughter | — | 12 | ~1928 |
| Robert Olsen | Son | — | 20 | ~1920 |
| Mary Olsen | Daughter | — | 18 | ~1922 |
| Elmer Olsen | Head | — | 47 | ~1893 |
| June Olsen | Spouse | — | 49 | ~1891 |
Census Appearances
Daughter, age 9
Wayne, Michigan · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Wayne-County, Michigan
Daughter, age 18
Wayne-County, Michigan · implied b. ~1922 — 7 household members
| Surname | Olsen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Highest Grade | Hs 4 |
| 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.
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 18 · b. ~1922 · Michigan
★ You are viewing this record
Sibling
Betty Olsen
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Olsen
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Olsen
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Olsen
Sibling · 1940 · age 14
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 — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01845-00411)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Irving Innes | 39 | Head | Investment Broker | Michigan |
| 2 | Harriett Innes | 40 | Wife | — | Connecticut |
| 3 | Harold Innes | 14 | Son | — | Michigan |
| 4 | Christine Froment | 57 | Head | Secretary | Ohio |
| 5 | Celia Sorenson | 47 | Partner | Secretary | Ohio |
| 6 | Mae Hannay | 58 | Head | — | Maryland |
| 7 | Ellen F. Anderson | 41 | Head | Teacher | Iowa |
| 8 | Alice B. Miller | 79 | Partner | — | Canada |
| 9 | Jane Poag | 44 | Head | Secretary | Michigan |
| 10 | Estelle Kershaw | 25 | Partner | Stenographer | Pennsylvania |
| 11 | Theodore Roth | 41 | Head | Surgeon | Pennsylvania |
| 12 | Roslyn C. Roth | 33 | Wife | — | New York |
| 13 | Bruce Leighton | 28 | Brother in law | Clerk | New York |
| 14 | Herman Butzier | 56 | Head | Toolmaker | Germany |
| 15 | Gertrude Butzier | 52 | Wife | — | Michigan |
| 16 | John P. Edmond | 49 | Head | Utility Man | Michigan |
| 17 | Jennie Edmond | 49 | Wife | — | Scotland |
| 18 | Nicholas De Belier | 46 | Head | Bumper | Italy |
| 19 | Marguerite De Belier | 46 | Wife | — | Ohio |
| 20 | Peter De Belier | 23 | Son | Grinder | Ohio |
| 21 | Michael De Belier | 22 | Son | Clerk | Ohio |
| 22 | Mary De Belier | 20 | Daughter | — | Ohio |
| 23 | Nicholas De Belier | 10 | Son | — | Michigan |
| 24 | Ethel Mcleod | 55 | Head | — | Canada |
| 25 | Thomas Fowler | 46 | Lodger | — | Kansas |
| 26 | Adelard Robitaille | 37 | Head | Dairy Worker | Canada |
| 27 | Lucille Robitaille | 36 | Wife | Attendant | Canada |
| 28 | Benton Cook | 30 | Head | Proprietor | Michigan |
| 29 | Irene Cook | 27 | Wife | — | Arkansas |
| 30 | Patrick Cook | 7 | Son | — | Colorado |
| 31 | Elmer Olsen | 47 | Head | Steam Fitter | Minnesota |
| 32 | June Olsen | 49 | Wife | — | Minnesota |
| 33 | Robert E. Olsen | 20 | Son | Newsworker | Minnesota |
| 34 | Mary Olsen THIS PERSON | 18 | Daughter | — | Minnesota |
| 35 | Richard P. Olsen | 14 | Son | — | Michigan |
| 36 | Betty M. Olsen | 12 | Daughter | — | Michigan |
| 37 | Jack Olsen | 10 | Son | — | Michigan |
| 38 | James G. Laird | 76 | Head | — | Canada |
| 39 | Annie Laird | 81 | Sister | — | England |
| 40 | Frances Laird | 78 | Sister | — | English |
Related Census Records
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)