MS
Mary Simons — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Iowa
Our Model Tree links this Mary Simons across the 1930 and 1940 US Censuses in Jefferson-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 9-person household.
Age 16
b. ~1924
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Iowa |
| Surname | Simons |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Industry | H |
| Highest Grade | No 7 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Center Township |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Frank Simons | Head | — | 46 | ~1894 |
| Mary Simons | Daughter | — | 16 | ~1924 |
| Myrtle Simons | Daughter | — | 9 | ~1931 |
| Marjory Simons | Spouse | — | 35 | ~1905 |
| Charles Simons | Son | — | 17 | ~1923 |
| Donald Simons | Son | — | 6 | ~1934 |
| Lois Simons | Daughter | — | 3 | ~1937 |
| Lloyd Simons | Son | — | 13 | ~1927 |
| Kenneth Simons | Son | — | 7 | ~1933 |
Census Appearances
1930
Jefferson, Iowa
Daughter, age 6
Jefferson, Iowa · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simons |
| Given Name | Mary |
| 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
Jefferson-County, Iowa
Daughter, age 16
Jefferson-County, Iowa · implied b. ~1924 — 9 household members
| Surname | Simons |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Jefferson |
| Industry | H |
| Highest Grade | No 7 |
| 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 Simons across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Simons
Daughter · 1940 · age 16 · b. ~1924 · Iowa
★ You are viewing this record
Sibling
Kenneth Simons
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lloyd Simons
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Simons
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Simons
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lois Simons
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Myrtle Simons
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 — Jefferson-County, Iowa
Open full size
1940 US Federal Census — Jefferson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01170-00054)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bernard Wilson | 24 | Head | Common Labor | Iowa |
| 2 | Letha Wilson | 22 | Wife | — | Illinois |
| 3 | Bernard Jr Wilson | 4 | Son | — | — |
| 4 | Byrde Wilson | 56 | Head | Maid | Illinois |
| 5 | Maggie Williams | 60 | Head | — | Iowa |
| 6 | George Williams | 65 | Husband | Not Able To Do | Iowa |
| 7 | Ervin Williams | 16 | Son | New Worker | Iowa |
| 8 | William Hill | 74 | Head | — | Iowa |
| 9 | Clara Hill | 70 | Wife | — | Iowa |
| 10 | Jr Risley | 8 | Grandson | — | Iowa |
| 11 | Lee Jasper | 53 | Head | Common Labor | Iowa |
| 12 | Hilda Jasper | 47 | Wife | — | Iowa |
| 13 | Marshall Simons | 13 | Nephew | — | Iowa |
| 14 | Richard Woodruff | 32 | Head | Laborer | Missouri |
| 15 | Thelma M. Woodruff | 23 | Wife | — | Iowa |
| 16 | James Hoskins | 55 | Head | Laborer | Iowa |
| 17 | Ella J. Hoskins | 14 | Daughter | — | Iowa |
| 18 | James Jr Hoskins | 11 | Son | — | Iowa |
| 19 | Walter Hill | 44 | Head | Laborer | Iowa |
| 20 | Edith Hill | 36 | Wife | — | Iowa |
| 21 | Josephine Hill | 10 | Daughter | — | Iowa |
| 22 | Myrtle Woodruff | 21 | Daughter | — | Iowa |
| 23 | Gary Woodruff | 2 | Grandson | — | — |
| 24 | Robert H. Hill | 53 | Head | Assembler | Iowa |
| 25 | Lola Hill | 50 | Wife | — | Iowa |
| 26 | Irvin Hill | 15 | Son | New Worker | Iowa |
| 27 | James Frakes | 69 | Head | — | Iowa |
| 28 | Frank Edler | 70 | Head | Don'T Choose To Work | Iowa |
| 29 | Frank Simons | 46 | Head | Laborer | Iowa |
| 30 | Marjory Simons | 35 | Wife | — | Iowa |
| 31 | Charles Simons | 17 | Son | Laborer | Iowa |
| 32 | Mary Simons THIS PERSON | 16 | Daughter | — | Iowa |
| 33 | Lloyd Simons | 13 | Son | — | Iowa |
| 34 | Myrtle Simons | 9 | Daughter | — | Iowa |
| 35 | Kenneth Simons | 7 | Son | — | Iowa |
| 36 | Donald Simons | 6 | Son | — | Iowa |
| 37 | Lois Simons | 3 | Daughter | — | Iowa |
| 38 | William Schultz | 23 | Head | Laborer | Iowa |
| 39 | Dena Schultz | 22 | Wife | — | Missouri |
| 40 | Dorothy Schultz | 3 | Daughter | — | 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)