MP
Mary Phelps — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Mary Phelps across the 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Phelps |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1926 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rufus Phelps | Son | — | 17 | ~1923 |
| Willietta Phelps | Daughter | — | 19 | ~1921 |
| Walter Phelps | Son | — | 23 | ~1917 |
| Janie Phelps | Head | — | 47 | ~1893 |
| John Phelps | Son | — | 10 | ~1930 |
| Mary Phelps | Daughter | — | 14 | ~1926 |
| Agusta Phelps | Son | — | 25 | ~1915 |
Census Appearances
1930
St Clair, …
Daughter, age 4
St Clair, Illinois · implied b. ~1926 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Phelps |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Mississippi |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Clair-County, Illinois
Daughter, age 14
St.-Clair-County, Illinois · implied b. ~1926 — 7 household members
| Surname | Phelps |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Income (1939) | 0 |
| Highest Grade | G 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 Phelps across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Phelps
Daughter · 1940 · age 14 · b. ~1926 · Illinois
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Sibling
Willietta Phelps
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rufus Phelps
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agusta Phelps
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Phelps
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Phelps
Sibling · 1940 · age 23
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-t0627-00881-00463)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Moses Jr. Ward | 11 | Son | — | Illinois |
| 42 | Grace Ward | 10 | Daughter | — | Illinois |
| 43 | Norma Ward | 9 | Daughter | — | Illinois |
| 44 | Gloria Ward | 3 | Daughter | — | Illinois |
| 45 | Bobbie Ward | 1 | Son | — | Illinois |
| 46 | Victor Morris | 40 | Head | Laborer | Texas |
| 47 | Johnnie Morris | 32 | Wife | — | Mississippi |
| 48 | Fletcher Smith | 36 | Head | Laborer | Tennessee |
| 49 | Louise Smith | 21 | Wife | — | Tennessee |
| 50 | Jacqueline Smith | 2 | Daughter | — | Illinois |
| 51 | Royal Smith | 1 | Son | — | Illinois |
| 52 | Walter Smith | 19 | Brother | Shoe Shiner | Tennessee |
| 53 | Clyde Cole | 37 | Head | Laborer | Tennessee |
| 54 | Fannie Cole | 25 | Wife | — | Illinois |
| 55 | Raymond Fairies | 7 | Son | — | Illinois |
| 56 | James Fairies | 5 | Son | — | Illinois |
| 57 | Dewey Foley | 29 | Head | — | Illinois |
| 58 | John Chandler | 52 | Head | Proprietor | Mississippi |
| 59 | Annie Walker | 29 | Lodger | — | Georgia |
| 60 | Mandell Sowell | 7 | Lodger | — | Illinois |
| 61 | Howard Sowell | 6 | Lodger | — | Illinois |
| 62 | Janie Phelps | 47 | Head | — | Mississippi |
| 63 | Agusta Phelps | 25 | Son | Laborer | Arkansas |
| 64 | Walter Phelps | 23 | Son | Laborer | Arkansas |
| 65 | Willietta Phelps | 19 | Daughter | — | Arkansas |
| 66 | Rufus Phelps | 17 | Son | — | Arkansas |
| 67 | Mary Phelps THIS PERSON | 14 | Daughter | — | Illinois |
| 68 | John Jr. Phelps | 10 | Son | — | Illinois |
| 69 | Albert Bass | 72 | Head | — | Kentucky |
| 70 | Lula Bass | 52 | Wife | — | Mississippi |
| 71 | Inez Bass | 39 | Daughter | — | Mississippi |
| 72 | Lemon Bass | 24 | Son | Presser | Arkansas |
| 73 | Millie Bass | 21 | Son | Laborer | Arkansas |
| 74 | Chester Kyles | 45 | Head | Laborer | Arkansas |
| 75 | Bertie Kyles | 41 | Wife | — | Arkansas |
| 76 | Leo Parker | 38 | Head | Merchant | Mississippi |
| 77 | Sadie Parker | 39 | Wife | — | Illinois |
| 78 | Isabell Taylor | 73 | Mother-in-law | — | Missouri |
| 79 | Cornelius Parker | 26 | Brother | Merchant | Mississippi |
| 80 | Isaac Mccoy | 47 | Head | Machinist | Texas |
Related Census Records
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)