MW
Mary Waters — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Henry-County, Iowa
Our Model Tree links this Mary Waters across the 1930 and 1940 US Censuses in Henry-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 8-person household.
Age 16
b. ~1924
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Henry-County, Iowa |
| Surname | Waters |
| Given Name | Mary Jean |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Henry |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Tippecanoe Twp |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Waters | Daughter | — | 16 | ~1924 |
| Mark Waters | Head | — | 41 | ~1899 |
| Donald Waters | Son | — | 13 | ~1927 |
| John Waters | Son | — | 8 | ~1932 |
| Laura Waters | Son | — | 5 | ~1935 |
| Lee Waters | Son | — | 6 | ~1934 |
| Robert Waters | Son | — | 10 | ~1930 |
| Mina Waters | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Henry, Iowa
Daughter, age 6
Henry, Iowa · implied b. ~1924 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Waters |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Henry-County, Iowa
Daughter, age 16
Henry-County, Iowa · implied b. ~1924 — 8 household members
| Surname | Waters |
| Given Name | Mary Jean |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Henry |
| Highest Grade | Hs 2 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Waters across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Waters
Daughter · 1940 · age 16 · b. ~1924 · Iowa
★ You are viewing this record
Sibling
Lee Waters
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laura Waters
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Waters
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Waters
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Waters
Sibling · 1940 · age 8
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 — Henry-County, Iowa
Open full size
1940 US Federal Census — Henry-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01166-01189)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Wanda Jones | 26 | daughter | Farmer | Iowa |
| 2 | Carl Hallowell | 24 | Head | Farmer | Iowa |
| 3 | Beulah Hallowell | 22 | Wife | — | Oklahoma |
| 4 | Penn Smith | 83 | Head | — | Pennsylvania |
| 5 | Ella Smith | 79 | Wife | — | Iowa |
| 6 | Sidney Smith | 52 | son | Farmer | Kansas |
| 7 | Harry Smith | 22 | grand | Laborer | Iowa |
| 8 | Minnie Trueblood | 61 | Head | Farmer | Iowa |
| 9 | Walter E. Trueblood | 54 | brother | Laborer | Iowa |
| 10 | Herman E. Hallowell | 33 | Head | Farmer | Iowa |
| 11 | Lois F. Hallowell | 30 | Wife | — | Iowa |
| 12 | Keith R. Hallowell | 8 | son | — | Iowa |
| 13 | Zelda May Hallowell | 4 | daughter | — | Iowa |
| 14 | Betty Jean Hallowell | 0 | daughter | — | Iowa |
| 15 | Howard Brown | 63 | Head | Farmer | Iowa |
| 16 | Lillie Brown | 55 | Wife | — | Iowa |
| 17 | Lloyd Brown | 16 | son | — | Iowa |
| 18 | J. L. Miller | 41 | Head | Farmer | Iowa |
| 19 | Emma Louise Miller | 49 | Wife | — | Iowa |
| 20 | J. Jesse Miller | 66 | Head | Farmer | Iowa |
| 21 | Virgil Miller | 27 | Head | 60 | Texas |
| 22 | Mary Helen Miller | 19 | Wife | — | Iowa |
| 23 | Chester D. Miller | 40 | Head | Farmer | Iowa |
| 24 | Flora Miller | 32 | Wife | — | Iowa |
| 25 | Eugene Miller | 12 | son | — | Iowa |
| 26 | Leo Ivan Miller | 11 | son | — | Iowa |
| 27 | Jerry Miller | 4 | son | — | Iowa |
| 28 | Nancy Riley | 80 | mother-in-law | — | Iowa |
| 29 | Mark D. Waters | 41 | Head | 60 | Iowa |
| 30 | Mina Waters | 40 | Wife | — | Iowa |
| 31 | Mary Jean Waters THIS PERSON | 16 | daughter | — | Iowa |
| 32 | Donald Waters | 13 | son | — | Iowa |
| 33 | Robert Waters | 10 | son | — | Iowa |
| 34 | John Waters | 8 | son | — | Iowa |
| 35 | Lee Waters | 6 | son | — | Iowa |
| 36 | Laura Waters | 5 | son | — | Iowa |
| 37 | Francis Harshbarger | 77 | Head | — | Iowa |
| 38 | Clara Harshbarger | 69 | Wife | — | Iowa |
| 39 | John D. Jones | 66 | Head | Farmer | Iowa |
| 40 | Maud Wanser | 46 | Niece | — | Nebraska |
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)