MD
Mary Duggan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · La-Plata-County, Colorado
Our Model Tree links this Mary Duggan across the 1930 and 1940 US Censuses in La-Plata-County, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 6-person household.
Age 16
b. ~1924
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | La-Plata-County, Colorado |
| Surname | Duggan |
| Given Name | Mary Virginia |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Durango city |
| 1935 Residence (County) | La Plata |
| Additional Details | |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Durango City |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| William Duggan | Head | — | 54 | ~1886 |
| Pansy Duggan | Spouse | — | 49 | ~1891 |
| John Duggan | Son | — | 20 | ~1920 |
| William Duggan | Son | — | 25 | ~1915 |
| Mary Duggan | Daughter | — | 16 | ~1924 |
| Edward Duggan | Son | — | 23 | ~1917 |
Census Appearances
1930
La Plata, …
Daughter, age 6
La Plata, Colorado · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duggan |
| Given Name | M. Virginia |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Missouri |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
La-Plata-County, Colorado
Daughter, age 16
La-Plata-County, Colorado · implied b. ~1924 — 6 household members
| Surname | Duggan |
| Given Name | Mary Virginia |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Durango city |
| 1935 Residence (County) | La Plata |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| 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 Duggan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Duggan
Daughter · 1940 · age 16 · b. ~1924 · Colorado
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Sibling
John Duggan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Duggan
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Duggan
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 — La-Plata-County, Colorado
Open full size
1940 US Federal Census — La-Plata-County, Colorado
Page Contents
33 people indexed on this census page (nara:1940:m-t0627-00466-00731)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William E. Duggan | 54 | Head | Accountant & Abstracter | Wisconsin |
| 2 | Pansy Duggan | 49 | Wife | Typist | Missouri |
| 3 | William (Ab) Duggan | 25 | Son | Abstract Assistant | Colorado |
| 4 | Edward (Ab) Duggan | 23 | Son | Teacher | Colorado |
| 5 | John (Ab) Duggan | 20 | Son | — | Colorado |
| 6 | Mary Virginia Duggan THIS PERSON | 16 | Daughter | — | Colorado |
| 7 | Clay V. Mcculloch | 44 | Head | Assistant Manager | Colorado |
| 8 | Alice P. Mcculloch | 42 | Wife | Saleswoman | Nebraska |
| 9 | Clay V. Jr. Mcculloch | 16 | Son | Errand Boy | Colorado |
| 10 | Zonia B. Mcculloch | 12 | Daughter | — | Colorado |
| 12 | Thurston T. Dudney | 37 | Head | Mechanical Inspector | Missouri |
| 13 | Doris G. Dudney | 36 | Wife | Stenographer | Colorado |
| 14 | Edgar B. Hollopeter | 25 | Brother in law | Billing | Colorado |
| 16 | Clara D. Sowers | 43 | Head | Junior Commodity Clerk | Oklahoma |
| 17 | Owen A. (Ab) Sowers | 19 | Son | — | Colorado |
| 18 | Betty Lou Sowers | 17 | Daughter | — | Colorado |
| 19 | Donald J. Sowers | 15 | Son | — | California |
| 20 | Alice D. Houser | 57 | Head | — | Utah |
| 21 | Margaret E. Wayt | 69 | Head | — | Missouri |
| 23 | Lon Masden | 39 | Head | Operator | Wisconsin |
| 24 | Josephine Masden | 37 | Wife | — | Austria |
| 25 | Leonard Masden | 16 | Son | — | Colorado |
| 26 | Earl Masden | 14 | Son | — | Colorado |
| 28 | Andrew H. Milow | 37 | Head | Janitor | Texas |
| 29 | Josie Milow | 41 | Wife | Maid | Oklahoma |
| 31 | Albert H. Kiesel | 44 | Head | Civil Engineer | Colorado |
| 32 | Daisy D. Kiesel | 36 | Wife | — | Texas |
| 33 | Kenneth A. Kiesel | 16 | Son | — | Colorado |
| 35 | Spencer M. Riddel | 32 | Head | Assistant County Supervis | Colorado |
| 36 | Lena W. Riddel | 27 | Wife | — | Colorado |
| 37 | Sena M. Riddel | 5 | Son | — | Colorado |
| 39 | Albert R. Boettcher | 60 | Head | 46 | Germany |
| 40 | Carrie Boettcher | 60 | Wife | — | Iowa |
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)