MH
Mary Hart — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this Mary Hart across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a daughter (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Hart |
| Given Name | Mary M. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | City and County of Denver |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Trained nurse |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1364 |
| Highest Grade | C-2-250 |
| 1935 Residence | Same house |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Trained Nurse |
| Township / Ward | City And County Of Denver |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| Mary Hart | Daughter | — | 23 | ~1917 |
| Elizabeth Hart | Daughter | — | 23 | ~1917 |
| Frances Hart | Daughter | — | 11 | ~1929 |
| Leonard Hart | Head | — | 51 | ~1889 |
| Leonard Hart | Son | — | 13 | ~1927 |
| Veronica Hart | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Denver, Colorado
Daughter, age 3
Denver, Colorado · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | New York |
| Mother's Birthplace | Colorado |
| Occupation | none |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
Daughter, age 14
Denver, Colorado · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | New York |
| Mother's Birthplace | Colorado |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Denver-County, Colorado
Daughter, age 23
Denver-County, Colorado · implied b. ~1917 — 6 household members
| Surname | Hart |
| Given Name | Mary M. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | City and County of Denver |
| 1935 Residence (County) | Denver |
| Occupation | Trained nurse |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1364 |
| Highest Grade | C-2-250 |
| 1935 Residence | Same house |
| 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 Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Hart (~0.92 confidence) and father Robert Hart (~0.92 confidence) and father Leonard Hart (~0.92 confidence) and mother Veronica Hart (~0.92 confidence) and mother Elizabeth Hart (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Hart
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Robert Hart
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Leonard Hart
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Veronica Hart
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Hart
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hart
Daughter · 1940 · age 23 · b. ~1917 · Colorado
★ You are viewing this record
Sibling
Elizabeth Hart
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Hart
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Hart
Sibling · 1940 · age 13
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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00489-00030)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Barbara Phillips | 7 | daughter | — | Colorado |
| 42 | William Phillips | 5 | son | — | Colorado |
| 43 | Joseph D. Joseph | 78 | head | — | W. Virginia |
| 44 | James D. James | 54 | head | Caretaker | Arkansas |
| 45 | Evelyn J. James | 39 | wife | — | Minnesota |
| 46 | George Mcgrew | 52 | head | Truck Salesman | Michigan |
| 47 | Catherine Mcgrew | 48 | wife | — | Holland |
| 48 | Dora Wagener | 76 | mother-in-law | — | Holland |
| 49 | Herbert Bettridge | 42 | head | Auditor | Colorado |
| 50 | Myrtle Bettridge | 37 | wife | Credit Dept. Worker | Colorado |
| 51 | Lula C. Flint | 50 | head | — | Colorado |
| 52 | George Flint | 18 | son | New Worker | Wyoming |
| 53 | Mary E. Hafliger | 67 | mother | — | Germany |
| 54 | Clara E. Hafliger | 47 | sister | Credit Manager | Colorado |
| 55 | Leonard Hart | 51 | head | Foreman Brick Yard | Colorado |
| 56 | Veronica Hart | 50 | wife | — | Colorado |
| 57 | Mary M. Hart THIS PERSON | 23 | daughter | Trained Nurse | Colorado |
| 58 | Elizabeth Hart | 23 | daughter | — | Colorado |
| 59 | Leonard Jr. Hart | 13 | son | — | Colorado |
| 60 | Frances Hart | 11 | daughter | — | Colorado |
| 61 | Patrick Higgins | 63 | head | Civil Engineer | Colorado |
| 62 | Alice D. Higgins | 40 | wife | — | Oklahoma |
| 63 | Carl S. Gentry | 37 | head | Window Cleaner | Kentucky |
| 64 | Ruth Gentry | 30 | wife | — | Colorado |
| 65 | Barbara J. Gentry | 0 | daughter | — | Colorado |
| 66 | Ralph Utt | 33 | head | Mining Engineer | Washington |
| 67 | Alberta Utt | 28 | wife | — | Utah |
| 68 | Nicholas Utt | 3 | son | — | Idaho |
| 69 | Alberta Utt | 2 | daughter | — | California |
| 70 | Mary Fisher | 19 | lodger | Maid | Montana |
| 71 | Merlin Modig | 28 | head | Attorney | Nebraska |
| 72 | Edna Modig | 27 | wife | — | Nebraska |
| 73 | Richard Modig | 6 | son | — | Nebraska |
| 74 | Helen Modig | 4 | daughter | — | Nebraska |
| 75 | Dorothy Modig | 3 | daughter | — | Nebraska |
| 76 | John Modig | 0 | son | — | Nebraska |
| 77 | William O'Brien | 65 | head | Tailor | New York |
| 78 | Catherine O'Brien | 64 | wife | — | Ireland |
| 79 | Charles Bickmore | 37 | head | Accountant | Utah |
| 80 | Helen Bickmore | 36 | wife | — | Iowa |
Related Census Records
Pedigree Summary
Mary + 3 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)