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Mary Hopkins — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Mary Hopkins across the 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Hopkins |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| Marilyn Hopkins | Daughter | — | 3 | ~1937 |
| Rose Hopkins | Daughter | — | 11 | ~1929 |
| Eileen Hopkins | Daughter | — | 16 | ~1924 |
| Mary Hopkins | Daughter | — | 15 | ~1925 |
| Clyde Hopkins | Head | — | 42 | ~1898 |
| Thomas Hopkins | Son | — | 9 | ~1931 |
| Charles Hopkins | Son | — | 13 | ~1927 |
| Raymond Hopkins | Son | — | 7 | ~1933 |
| Francis Hopkins | Son | — | 18 | ~1922 |
| Edward Hopkins | Son | — | 5 | ~1935 |
| Teresa Hopkins | Spouse | — | 41 | ~1899 |
Census Appearances
1930
St Clair, …
Daughter, age 7
St Clair, Illinois · implied b. ~1923 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hopkins |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Clair-County, Illinois
Daughter, age 15
St.-Clair-County, Illinois · implied b. ~1925 — 11 household members
| Surname | Hopkins |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Industry | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Hopkins across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hopkins
Daughter · 1940 · age 15 · b. ~1925 · Illinois
★ You are viewing this record
Sibling
Francis Hopkins
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Hopkins
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eileen Hopkins
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marilyn Hopkins
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Hopkins
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Hopkins
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Hopkins
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Hopkins
Sibling · 1940 · age 7
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 — St.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00881-00876)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Muckey | 13 | son | — | Nebraska |
| 2 | Alice Muckey | 10 | daughter | — | Nebraska |
| 3 | Jack Muckey | 7 | son | — | Illinois |
| 4 | Harry Muckey | 46 | lodger | Laborer | Illinois |
| 5 | William Murtzke | 46 | Head | Laborer | Illinois |
| 6 | Adeline Murtzke | 45 | Wife | — | Illinois |
| 7 | Arnold Murtzke | 24 | son | Apprentice Brew Master | Illinois |
| 8 | William Murtzke | 20 | son | New Worker | Illinois |
| 9 | Leroy Murtzke | 16 | son | — | Illinois |
| 10 | Elsie Murtzke | 12 | daughter | — | Illinois |
| 11 | Edith Murtzke | 10 | daughter | — | Illinois |
| 12 | Vera May Murtzke | 9 | daughter | — | Illinois |
| 13 | Oscar T Mcmoyer | 67 | Head | — | New York |
| 14 | Daisy May Mcmoyer | 58 | Wife | — | Illinois |
| 15 | James A Hopkins | 25 | Head | Chauffeur | Missouri |
| 16 | Geraldine Hopkins | 20 | Wife | — | Missouri |
| 17 | James L Hopkins | 4 | son | — | Missouri |
| 18 | Joyce Marie Hopkins | 2 | daughter | — | Missouri |
| 19 | Ethel Lowery | 52 | mother-in-law | — | Kentucky |
| 20 | Alfred Ruess | 38 | Head | Blacksmith Maker | Illinois |
| 21 | Ellen Ruess | 28 | Wife | — | Illinois |
| 22 | Clyde Hopkins | 42 | Head | Laborer | Pennsylvania |
| 23 | Teresa Hopkins | 41 | Wife | — | Indiana |
| 24 | Francis Hopkins | 18 | son | File Clerk | Indiana |
| 25 | Eileen Hopkins | 16 | daughter | — | Indiana |
| 26 | Mary Hopkins THIS PERSON | 15 | daughter | — | Illinois |
| 27 | Charles Hopkins | 13 | son | — | Illinois |
| 28 | Rose Ann Hopkins | 11 | daughter | — | Illinois |
| 29 | Thomas Hopkins | 9 | son | — | Illinois |
| 30 | Raymond Hopkins | 7 | son | — | Illinois |
| 31 | Edward Hopkins | 5 | son | — | Illinois |
| 32 | Marilyn Hopkins | 3 | daughter | — | Illinois |
| 33 | Edgar Eberle | 28 | Head | Rigger Helper | Illinois |
| 34 | Ida Eberle | 24 | Wife | Saleswoman | Illinois |
| 35 | Clyde Billen | 25 | Head | Laborer | Illinois |
| 36 | Bernice Billen | 20 | Wife | — | Illinois |
| 37 | Charles Caston | 66 | Head | — | Illinois |
| 38 | Belle Caston | 61 | Wife | — | Illinois |
| 39 | Waldo Norton | 39 | Head | Electrician | Illinois |
| 40 | Leona Norton | 29 | 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)