MS
Mary Shannon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Colorado
Our Model Tree links this Mary Shannon across the 1930 and 1940 US Censuses in Jefferson-County, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Colorado |
| Surname | Shannon |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Precinct 20 Northwest Arvada |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Precinct 20 Northwest Arvada |
| Est. Birth Year | ~1928 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Shannon | Son | — | 16 | ~1924 |
| Elizabeth Shannon | Head | — | 43 | ~1897 |
| Charles Shannon | Son | — | 4 | ~1936 |
| Frederick Shannon | Son | — | 15 | ~1925 |
| Mary Shannon | Daughter | — | 12 | ~1928 |
| Blaine Shannon | Son | — | 17 | ~1923 |
| Ruth Shannon | Daughter | — | 10 | ~1930 |
| Edna Shannon | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Jefferson, Colorado
Daughter, age 2
Jefferson, Colorado · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shannon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Jefferson-County, Colorado
Daughter, age 12
Jefferson-County, Colorado · implied b. ~1928 — 8 household members
| Surname | Shannon |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Precinct 20 Northwest Arvada |
| 1935 Residence (County) | Jefferson |
| Highest Grade | No 6 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Shannon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Shannon
Daughter · 1940 · age 12 · b. ~1928 · Colorado
★ You are viewing this record
Sibling
Edna Shannon
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Shannon
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Blaine Shannon
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Shannon
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Shannon
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Shannon
Sibling · 1940 · age 10
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 — Jefferson-County, Colorado
Open full size
1940 US Federal Census — Jefferson-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00465-00659)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John F. Wick | 66 | Head | Farmer | Germany |
| 2 | Marie E. Wick | 54 | Wife | — | Colorado |
| 3 | Ted C. Traxler | 27 | Head | Dairyman Sales | Colorado |
| 4 | Louise C. Traxler | 25 | Wife | — | Colorado |
| 5 | Gwen Ellen Traxler | 5 | Daughter | — | Colorado |
| 6 | Clarence Snively | 51 | Head | Farmer | Colorado |
| 7 | Viola Snively | 49 | Wife | Assist | Colorado |
| 8 | Ellen Nora Snively | 75 | Mother | — | Colorado |
| 9 | Alvin Klaffke | 47 | Head | Farmer | Germany |
| 10 | Hazel E. Klaffke | 43 | Wife | — | Canada |
| 11 | Charles A. Klaffke | 16 | Son | — | Colorado |
| 12 | Benjamin Klaffke | 13 | Son | — | Colorado |
| 13 | Ruth Klaffke | 11 | Daughter | — | Colorado |
| 14 | Martha Klaffke | 8 | Daughter | — | Colorado |
| 15 | John W. Dortch | 40 | Head | Laborer | Missouri |
| 16 | Pearl M. Dortch | 35 | Wife | — | Kansas |
| 17 | Arlie T. Dortch | 17 | Son | Janitor'S Helper | Texas |
| 18 | Jack K. Dortch | 14 | Son | — | Texas |
| 19 | Max C. Dortch | 12 | Son | — | Texas |
| 20 | Dale S. Dortch | 10 | Son | — | Texas |
| 21 | Attie P. Trailers | 42 | Head | Farmer | Arkansas |
| 22 | Lucill M. Trailers | 39 | Wife | — | Texas |
| 23 | Vergil Lucine Trailers | 20 | Son | Farmer | Arkansas |
| 24 | Ralph W. Trailers | 16 | Son | — | Arkansas |
| 25 | James C. Finley | 29 | Head | Farming | Missouri |
| 26 | Frances E. Finley | 24 | Wife | Caretaker | Kansas |
| 27 | Clarence E. Shoop | 64 | Head | Farmer | Pennsylvania |
| 28 | Florence E. Shoop | 61 | Wife | — | Pennsylvania |
| 29 | J. G. Fentress | 35 | Boarder | Operator | Tennessee |
| 30 | Claryce T. Fentress | 26 | Daughter | Farmer | Colorado |
| 31 | Vergil Reeve | 18 | Boarder | Farm Laborer | Nebraska |
| 32 | Elizabeth Shannon | 43 | Head | Farmer | Colorado |
| 33 | Blaine F. Shannon | 17 | Son | — | Colorado |
| 34 | Robert C. Shannon | 16 | Son | — | Colorado |
| 35 | Frederick C. Shannon | 15 | Son | — | Colorado |
| 36 | Mary E. Shannon THIS PERSON | 12 | Daughter | — | Colorado |
| 37 | Ruth A. Shannon | 10 | Daughter | — | Colorado |
| 38 | Edna S. Shannon | 5 | Daughter | — | Colorado |
| 39 | Charles A. Shannon | 4 | Son | — | Colorado |
| 40 | Samuel S. Browne | 71 | Head | Farmer | Scotland |
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)