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William Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Olmsted-County, Minnesota
Our Model Tree links this William Dempsey across the 1930 and 1940 US Censuses in Olmsted-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 6-person household.
Age 47
b. ~1893
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Olmsted-County, Minnesota |
| Surname | Dempsey |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Elmira Twp |
| 1935 Residence (County) | Olmsted |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farmer |
| Township / Ward | Elmira Twp |
| Est. Birth Year | ~1893 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Edward Dempsey | Son | — | 5 | ~1935 |
| Lucille Dempsey | Daughter | — | 3 | ~1937 |
| Mary Dempsey | Daughter | — | 8 | ~1932 |
| Harry Gummer | Other | — | 49 | ~1891 |
| Vera Dempsey | Spouse | — | 46 | ~1894 |
| William Dempsey | Head | — | 47 | ~1893 |
Census Appearances
1930
Olmsted, Minnesota
Son, age 37
Olmsted, Minnesota · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | William S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Olmsted-County, Minnesota
Head, age 47
Olmsted-County, Minnesota · implied b. ~1893 — 6 household members
| Surname | Dempsey |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Elmira Twp |
| 1935 Residence (County) | Olmsted |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 William Dempsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Dempsey
Head · 1940 · age 47 · b. ~1893 · Minnesota
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Olmsted-County, Minnesota
Open full size
1940 US Federal Census — Olmsted-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01943-00562)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert P. Keefe | 12 | Son | — | Minnesota |
| 42 | Jean E. Keefe | 10 | daughter | — | Minnesota |
| 43 | Helen M. Keefe | 8 | daughter | — | Minnesota |
| 44 | Patrick J. Keefe | 5 | Son | — | Minnesota |
| 45 | Catherine L. Keefe | 3 | daughter | — | Minnesota |
| 46 | John E. Keefe | 1 | Son | — | Minnesota |
| 47 | Oscar Cobra | 39 | Hired Hand | Laborer | Minnesota |
| 48 | Walter S. Erickson | 20 | Hired Hand | Laborer | Minnesota |
| 49 | Frank J. Manahan | 40 | Head | Farmer | Minnesota |
| 50 | Margaret A. Manahan | 39 | Wife | — | Minnesota |
| 51 | Mary E. Manahan | 12 | daughter | — | Minnesota |
| 52 | Joe M. Manahan | 10 | Son | — | Minnesota |
| 53 | Leo F. Manahan | 8 | Son | — | Minnesota |
| 54 | Edward P. Manahan | 5 | Son | — | Minnesota |
| 55 | Edwin Z. Erickson | 21 | Hired Hand | Laborer | Minnesota |
| 56 | John J. Keefe | 51 | Head | Farmer | Minnesota |
| 57 | Elizabeth M. Keefe | 49 | Wife | — | Minnesota |
| 58 | Clement M. Keefe | 15 | Son | — | Minnesota |
| 59 | James F. Gullit | 23 | Hired Hand | Laborer | Minnesota |
| 60 | William J. Dempsey THIS PERSON | 47 | Head | Farmer | Minnesota |
| 61 | Vera J. Dempsey | 46 | Wife | — | Minnesota |
| 62 | Mary Irene Dempsey | 8 | daughter | — | Minnesota |
| 63 | Edward J. Dempsey | 5 | Son | — | Minnesota |
| 64 | Lucille A. Dempsey | 3 | daughter | — | Minnesota |
| 65 | Harry Gummer | 49 | Hired Hand | Laborer | England |
| 66 | Martin E. Nelson | 52 | Head | Farmer | Minnesota |
| 67 | Jennie M. Nelson | 62 | Wife | — | Minnesota |
| 68 | Marvin E. Nelson | 16 | Son | — | Minnesota |
| 69 | Donald O. Nelson | 19 | Son | — | Minnesota |
| 70 | John Klappenbach | 53 | Head | Laborer | Minnesota |
| 71 | Harriette M. Klappenbach | 15 | daughter | — | Minnesota |
| 72 | Catherine Klitzke | 62 | Mother in law | — | Minnesota |
| 73 | Arthur H. Bichner | 41 | Head | Farmer | Minnesota |
| 74 | Sarah M. Bichner | 39 | Wife | — | Minnesota |
| 75 | Erwin C. Bichner | 18 | Son | — | Minnesota |
| 76 | Marvin E. Bichner | 16 | Son | — | Minnesota |
| 77 | Marcella Bichner | 16 | daughter | — | Minnesota |
| 78 | Lorraine C. Bichner | 14 | daughter | — | Minnesota |
| 79 | Pauline R. Pluetz | 71 | Head | — | Germany |
| 80 | Edward G. Pluetz | 40 | Son | Farmer | Minnesota |
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)