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Mary Lopez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Mary Lopez across the 1930 and 1940 US Censuses in Scott-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 | Scott-County, Iowa |
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Davenport City |
| 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 |
|---|---|---|---|---|
| Carrie Lopez | Spouse | — | 38 | ~1902 |
| Mary Lopez | Daughter | — | 16 | ~1924 |
| Sherry Lopez | Daughter | — | 3 | ~1937 |
| Richard Lopez | Son | — | 14 | ~1926 |
| Kenneth Lopez | Son | — | 12 | ~1928 |
| Betty Lopez | Daughter | — | 10 | ~1930 |
| Amilo Lopez | Head | — | 55 | ~1885 |
| Donald Lopez | Son | — | 6 | ~1934 |
| Josephine Lopez | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Scott, Iowa
Daughter, age 6
Scott, Iowa · implied b. ~1924 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | May |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Daughter, age 16
Scott-County, Iowa · implied b. ~1924 — 9 household members
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| 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 Lopez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lopez
Daughter · 1940 · age 16 · b. ~1924 · Iowa
★ You are viewing this record
Sibling
Josephine Lopez
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Lopez
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Lopez
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Lopez
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sherry Lopez
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Lopez
Sibling · 1940 · age 14
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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
24 people indexed on this census page (nara:1940:m-t0627-01202-01206)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Chris Bagus | 56 | Head | Dish Washer | Greece |
| 2 | Robert Lee | 50 | Head | — | Iowa |
| 3 | Matt Garcia | 68 | Head | — | Italy |
| 4 | John Krey | 73 | Head | — | Bohemia |
| 5 | Amilo Lopez | 55 | Head | Section Hand | Mexico |
| 6 | Carrie Lopez | 38 | Wife | — | Iowa |
| 7 | Josephine Lopez | 17 | Daughter | — | Iowa |
| 8 | Mary Lopez THIS PERSON | 16 | Daughter | — | Iowa |
| 9 | Richard Lopez | 14 | Son | — | Iowa |
| 10 | Kenneth Lopez | 12 | Son | — | Iowa |
| 11 | Betty Lopez | 10 | Daughter | — | Iowa |
| 12 | Donald Lopez | 6 | Son | — | Iowa |
| 13 | Sherry Lopez | 3 | Daughter | — | Iowa |
| 14 | Dora Anderson | 68 | Head | — | Illinois |
| 15 | Axel Ring | 44 | Head | Carpenter Helper | Norway |
| 16 | Laura Ring | 30 | Wife | — | Pennsylvania |
| 17 | Sophia Ring | 15 | Daughter | — | Minnesota |
| 18 | Anna Ring | 10 | Daughter | — | Wisconsin |
| 19 | John Ring | 8 | Son | — | Iowa |
| 20 | Patricia Ann Ring | 5 | Daughter | — | Iowa |
| 21 | Jessie Kreden | 71 | Head | — | Missouri |
| 23 | Joseph Gonna | 48 | Head | — | Illinois |
| 24 | George Goldschmidt | 48 | Head | Truck Driver | Illinois |
| 25 | Margaret Goldschmidt | 45 | Wife | — | Illinois |
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)