MH
Mary Henderson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Arapahoe-County, Colorado
Our Model Tree links this Mary Henderson across the 1930 and 1940 US Censuses in Arapahoe-County, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 11-person household.
Age 11
b. ~1929
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Arapahoe-County, Colorado |
| Surname | Henderson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Englewood |
| 1935 Residence (County) | Arapahoe |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same house |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Englewood |
| 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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Charlotte Henderson | Daughter | — | ~1940 | |
| Dorothy Henderson | Daughter | — | 18 | ~1922 |
| Mildred Henderson | Daughter | — | 2 | ~1938 |
| Louise Henderson | Daughter | — | 14 | ~1926 |
| Mary Henderson | Daughter | — | 11 | ~1929 |
| Ruth Henderson | Daughter | — | 5 | ~1935 |
| John Henderson | Head | — | 43 | ~1897 |
| Robert Henderson | Son | — | 4 | ~1936 |
| John Henderson | Son | — | 16 | ~1924 |
| Billie Henderson | Son | — | 8 | ~1932 |
| Mildred Henderson | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Denver, Colorado
Other, age 1
Denver, Colorado · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Henderson |
| Given Name | Mary O. |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Nebraska |
| Occupation | none |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Arapahoe-County, Colorado
Daughter, age 11
Arapahoe-County, Colorado · implied b. ~1929 — 11 household members
| Surname | Henderson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Englewood |
| 1935 Residence (County) | Arapahoe |
| Highest Grade | 6 |
| 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 Henderson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Henderson
Daughter · 1940 · age 11 · b. ~1929 · Colorado
★ You are viewing this record
Sibling
Billie Henderson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Henderson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charlotte Henderson
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Henderson
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Henderson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Henderson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Henderson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Henderson
Sibling · 1940 · age 5
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 — Arapahoe-County, Colorado
Open full size
1940 US Federal Census — Arapahoe-County, Colorado
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00455-00243)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George Drum | 24 | Head | Checker | Kansas |
| 42 | Edna Q. Drum | 23 | Wife | — | Illinois |
| 43 | Shirley Ann Drum | 1 | Daughter | — | Colorado |
| 44 | Harvey Waldren | 51 | Head | Gardner | Missouri |
| 45 | Myrtle Waldren | 46 | Wife | — | Missouri |
| 46 | Howard Waldren | 16 | Son | Gardener | Missouri |
| 47 | Herbert Waldren | 11 | Son | — | Missouri |
| 48 | James Q. Berry | 20 | Head | Painter | Colorado |
| 49 | Mondell Berry | 19 | Wife | — | Colorado |
| 50 | Mary Lou Berry | 2 | Daughter | — | Colorado |
| 51 | James Berry | 1 | Son | — | Colorado |
| 52 | Edward Berry | 0 | Son | — | Colorado |
| 53 | Harold Patterson | 38 | Head | Carpenter | Kansas |
| 54 | Lucie Patterson | 30 | Wife | — | Missouri |
| 55 | Terrence Patterson | 11 | Son | — | Colorado |
| 56 | Howard Patterson | 7 | Son | — | Colorado |
| 57 | Carol Patterson | 4 | Daughter | — | Colorado |
| 58 | James Mcnamara | 45 | Head | — | Colorado |
| 59 | Francis Mcnamara | 9 | Son | — | Colorado |
| 60 | Dawson Mcnamara | 21 | Son | Laborer | Colorado |
| 61 | Jerry M. Phillips | 62 | Head | — | N. Carolina |
| 62 | Elizabeth Phillips | 49 | Wife | — | Kansas |
| 63 | Evelyn Phillips | 6 | Daughter | — | Colorado |
| 64 | John Henderson | 43 | Head | Mechanic | Illinois |
| 65 | Mildred Henderson | 40 | Wife | — | Nebraska |
| 66 | Dorothy Henderson | 18 | Daughter | New Worker | Colorado |
| 67 | John Ray Henderson | 16 | Son | Newspaper Deliverer | Colorado |
| 68 | Louise Henderson | 14 | Daughter | — | Colorado |
| 69 | Mary Henderson THIS PERSON | 11 | Daughter | — | Colorado |
| 70 | Billie Henderson | 8 | Son | — | Colorado |
| 71 | Ruth Henderson | 5 | Daughter | — | Colorado |
| 72 | Robert Henderson | 4 | Son | — | Colorado |
| 73 | Mildred Henderson | 2 | Daughter | — | Colorado |
| 74 | Charlotte Henderson | 0 | Daughter | — | Colorado |
| 76 | Alonzo K. Ride | 52 | Head | Pattern Maker | Pennsylvania |
| 77 | Pearl Ride | 52 | Wife | — | Pennsylvania |
| 78 | Addie Chrisman | 77 | Head | — | Iowa |
| 79 | Perry Clifford | 34 | Head | Painter | Colorado |
| 80 | Marie Clifford | 30 | 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)