MC
Mary Coffey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Mary Coffey across the 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Coffey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Highest Grade | H-2 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Springfield 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Coffey | Daughter | — | 7 | ~1933 |
| Waneta Coffey | Daughter | — | 9 | ~1931 |
| Bertha Coffey | Spouse | — | 40 | ~1900 |
| Clifford Coffey | Son | — | 14 | ~1926 |
| Charles Coffey | Head | — | 52 | ~1888 |
| Lawrence Coffey | Son | — | 15 | ~1925 |
| Mary Coffey | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Sangamon, Illinois
Daughter, age 6
Sangamon, Illinois · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | Mildred |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Texas |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Daughter, age 16
Sangamon-County, Illinois · implied b. ~1924 — 7 household members
| Surname | Coffey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Highest Grade | H-2 |
| 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 Coffey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Coffey
Daughter · 1940 · age 16 · b. ~1924 · Illinois
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Sibling
Helen Coffey
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifford Coffey
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Waneta Coffey
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Coffey
Sibling · 1940 · age 15
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 — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00884-00608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sherman Ficker | 21 | Head | Odd Jobs | Illinois |
| 42 | Annabelle Ficker | 17 | Wife | — | Illinois |
| 43 | Carolyn Ficker | 0 | Daughter | — | Illinois |
| 44 | Henry Coffey | 73 | Grandfather | — | Kentucky |
| 45 | Charles Coffey | 52 | Head | Laborer | Texas |
| 46 | Bertha Coffey | 40 | Wife | — | Illinois |
| 47 | Mary Coffey THIS PERSON | 16 | Daughter | — | Illinois |
| 48 | Lawrence Coffey | 15 | Son | — | Illinois |
| 49 | Clifford Coffey | 14 | Son | — | Illinois |
| 50 | Waneta Coffey | 9 | Daughter | — | Illinois |
| 51 | Helen Coffey | 7 | Daughter | — | Illinois |
| 52 | Secaputo Vito | 52 | Head | — | Italy |
| 53 | Rose Vito | 44 | Wife | — | Italy |
| 54 | Russell Vito | 23 | Son | — | Illinois |
| 55 | Loreta Vito | 20 | Daughter | Stenographer | Illinois |
| 56 | Stella Vito | 17 | Daughter | — | Illinois |
| 57 | Frank Vito | 18 | Son | — | Illinois |
| 58 | Joe Vito | 16 | Son | — | Illinois |
| 59 | Vito Jr Vito | 11 | Son | — | Illinois |
| 60 | Dominic Campo | 59 | Head | Proprietor | Italy |
| 61 | Katie Campo | 47 | Wife | — | Italy |
| 62 | Frank Campo | 25 | Son | Helper | Illinois |
| 63 | Ferdinand Moscardelli | 29 | Head | Miner | Illinois |
| 64 | Adeline Moscardelli | 31 | Wife | — | Illinois |
| 65 | Russell Weller | 30 | Head | Truck Driver | Illinois |
| 66 | Naomi Weller | 30 | Wife | — | Illinois |
| 67 | Russell Weller | 11 | Son | — | Illinois |
| 68 | Lloyd Weller | 9 | Son | — | Illinois |
| 69 | Marie Weller | 5 | Daughter | — | Illinois |
| 70 | Katherine Weller | 2 | Daughter | — | Illinois |
| 71 | Andrew Catalano | 59 | Head | Miner | Italy |
| 72 | Virginia Catalano | 67 | Wife | — | Italy |
| 73 | Vito Catalano | 29 | Son | Bartender | Italy |
| 74 | Nancy Catalano | 32 | Daughter | Stitcher | Italy |
| 75 | Joe Zappa | 42 | Head | — | Italy |
| 76 | Mary Zappa | 41 | Wife | — | Italy |
| 77 | Angie Zappa | 15 | Daughter | — | Illinois |
| 78 | Annie Zappa | 11 | Daughter | — | Illinois |
| 79 | Leo Zappa | 10 | Son | — | Illinois |
| 80 | Sylvia Zappa | 8 | Daughter | — | 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)