MH
Mary Hogan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boulder-County, Colorado
Our Model Tree links this Mary Hogan across the 1930 and 1940 US Censuses in Boulder-County, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boulder-County, Colorado |
| Surname | Hogan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | some place |
| 1935 Residence (County) | some place |
| Additional Details | |
| Highest Grade | 3 |
| 1935 Residence | some place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Election Precinct 7 Marshall |
| Est. Birth Year | ~1929 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Allice Hogan | Daughter | — | 7 | ~1933 |
| Mary Hogan | Daughter | — | 11 | ~1929 |
| Helen Hogan | Daughter | — | 9 | ~1931 |
| Norma Hogan | Daughter | — | 6 | ~1934 |
| Tom Hogan | Head | — | 33 | ~1907 |
| Thalus Hogan | Son | — | ~1940 | |
| Tom Hogan | Son | — | 4 | ~1936 |
| Bernard Hogan | Son | — | 2 | ~1938 |
| Allice Hogan | Spouse | — | 33 | ~1907 |
Census Appearances
1930
Boulder, Colorado
Daughter, age
Boulder, Colorado · implied b. ~1930 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hogan |
| Given Name | Marjorie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Kansas |
| Can Read/Write | No |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Boulder-County, Colorado
Daughter, age 11
Boulder-County, Colorado · implied b. ~1929 — 9 household members
| Surname | Hogan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | some place |
| 1935 Residence (County) | some place |
| Highest Grade | 3 |
| 1935 Residence | some 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 Hogan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hogan
Daughter · 1940 · age 11 · b. ~1929 · Colorado
★ You are viewing this record
Sibling
Tom Hogan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Allice Hogan
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Hogan
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thalus Hogan
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norma Hogan
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Hogan
Sibling · 1940 · age 9
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 — Boulder-County, Colorado
Open full size
1940 US Federal Census — Boulder-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00457-00101)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Angela Sister | 27 | lodger | Laborer | Germany |
| 42 | Maria Sister | 23 | lodger | Laborer | Germany |
| 43 | Victor Benedict | 52 | lodger | Laborer | Illinois |
| 44 | Murray Robert | 69 | head | Priest | Illinois |
| 45 | William Spicer | 41 | head | Farmer | Colorado |
| 46 | John Shum | 45 | head | Farmer | Nebraska |
| 47 | Clentone Shum | 43 | wife | — | Iowa |
| 48 | Victor Shum | 22 | son | Laborer | Nebraska |
| 49 | Vernon Shum | 17 | son | — | Colorado |
| 50 | George H. Hogan | 65 | head | Caretaker | Colorado |
| 51 | Sam Mcree | 27 | lodger | Laborer | Colorado |
| 52 | Frank Brandt | 43 | head | Farmer | Illinois |
| 53 | Anna Brandt | 40 | wife | — | Colorado |
| 54 | Francis Brandt | 20 | son | Laborer | Illinois |
| 55 | George Brandt | 19 | son | Laborer | Illinois |
| 56 | August Clyncke | 78 | head | — | Belgium |
| 57 | Florence Clyncke | 73 | wife | — | Belgium |
| 58 | Mary Clyncke | 42 | daughter | Teacher Grade School | Colorado |
| 59 | Alice Clyncke | 37 | daughter | Secretary | Colorado |
| 60 | Kingdom Parsons | 33 | head | Interior Decorator | Missouri |
| 61 | Marie Parsons | 33 | wife | — | Colorado |
| 62 | Kingdom Parsons | 9 | son | — | Colorado |
| 63 | Louis Parsons | 7 | son | — | Colorado |
| 64 | Patricia Parsons | 4 | daughter | — | Colorado |
| 65 | Virginia Parsons | 1 | daughter | — | Colorado |
| 66 | Tom Hogan | 33 | head | Farmer | Colorado |
| 67 | Allice Hogan | 33 | wife | — | Kansas |
| 68 | Mary Hogan THIS PERSON | 11 | daughter | — | Colorado |
| 69 | Helen Hogan | 9 | daughter | — | Colorado |
| 70 | Allice Hogan | 7 | daughter | — | Colorado |
| 71 | Norma Hogan | 6 | daughter | — | Colorado |
| 72 | Tom Hogan | 4 | son | — | Colorado |
| 73 | Bernard Hogan | 2 | son | — | Colorado |
| 74 | Thalus Hogan | 0 | son | — | Colorado |
| 75 | James Leverton | 63 | head | Miner | Colorado |
| 76 | Maude Leverton | 68 | wife | — | Colorado |
| 77 | Irwin Leverton | 34 | son | Miner | Colorado |
| 78 | Carl Leverton | 31 | son | Miner | Colorado |
| 79 | Robert Leverton | 8 | grandson | — | Colorado |
| 80 | Edward Douglas | 68 | head | Farmer | West Virginia |
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)