SD
Shirley Davis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Macon-County, Illinois
Our Model Tree links this Shirley Davis across the 1930 and 1940 US Censuses in Macon-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 7-person household.
Age 10
b. ~1930
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Macon-County, Illinois |
| Surname | Davis |
| Given Name | Shirley M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Decatur City |
| 1935 Residence (County) | Macon |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Decatur City |
| Est. Birth Year | ~1930 |
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 Shirley | Age | Birth yr |
|---|---|---|---|---|
| Shirley Davis | Daughter | — | 10 | ~1930 |
| Lon Davis | Head | — | 46 | ~1894 |
| Fay Davis | Daughter | — | 11 | ~1929 |
| Ruth Davis | Son | — | 10 | ~1930 |
| Helen Davis | Spouse | — | 44 | ~1896 |
| Lyle Davis | Son | — | 8 | ~1932 |
| Janet Davis | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Macon, Illinois
Daughter, age
Macon, Illinois · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Shirley |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Macon-County, Illinois
Daughter, age 10
Macon-County, Illinois · implied b. ~1930 — 7 household members
| Surname | Davis |
| Given Name | Shirley M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Decatur City |
| 1935 Residence (County) | Macon |
| Highest Grade | 4 |
| 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 Shirley Davis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Shirley Davis
Daughter · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Fay Davis
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lyle Davis
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Davis
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Janet Davis
Sibling · 1940 · age 5
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 — Macon-County, Illinois
Open full size
1940 US Federal Census — Macon-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00844-00359)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mae Leach | 44 | Head | Apprentice | Ohio |
| 2 | Everett Leach | 20 | Son | Sheet Metal | Illinois |
| 3 | Kathryn Leach | 18 | Daughter | Secretary | Illinois |
| 4 | Robert Colbeck | 28 | Head | Laborer | Illinois |
| 5 | Mary Colbeck | 27 | Wife | Machine Operator | Illinois |
| 6 | Robert Jr. Colbeck | 5 | Son | — | Illinois |
| 7 | David Colbeck | 2 | Son | — | Illinois |
| 8 | Elizabeth Elliott | 14 | Maid | Maid | Kentucky |
| 9 | Elmer Stern | 32 | Head | Laboratorian | Illinois |
| 10 | Clara Stern | 35 | Wife | — | Illinois |
| 11 | June Jean Stern | 4 | Daughter | — | Illinois |
| 12 | Elmer Jr. Stern | 2 | Son | — | Illinois |
| 13 | Thomas Campbell | 28 | Head | Polisher-Metal | Illinois |
| 14 | Lula Campbell | 24 | Wife | — | Illinois |
| 15 | Jimmy Campbell | 2 | Son | — | Illinois |
| 16 | Lurene Freese | 20 | Sister-in-law | — | Illinois |
| 17 | Walter Plankenhorn | 45 | Head | Supply Clerk | Illinois |
| 18 | Hazel Plankenhorn | 41 | Wife | — | Illinois |
| 19 | Dorothy Plankenhorn | 22 | Daughter | Stenographer | Illinois |
| 20 | Walter Jr. Plankenhorn | 19 | Son | Assistant Manager | Illinois |
| 21 | Marion Plankenhorn | 16 | Daughter | — | Illinois |
| 22 | Richard Plankenhorn | 10 | Son | — | Illinois |
| 23 | Alfred A. Cooper | 67 | Head | — | England |
| 24 | Nellie Davis | 34 | Daughter | — | Illinois |
| 25 | Ray Davis | 39 | Son-in-law | Iron Moulder | Illinois |
| 26 | Dickey Davis | 15 | Grandson | — | Illinois |
| 27 | Norma Davis | 13 | Granddaughter | — | Illinois |
| 28 | F. Joseph Walsh | 29 | Head | Laborer | Illinois |
| 29 | Dorothy Walsh | 26 | Wife | — | Illinois |
| 30 | Russell Stalcup | 39 | Head | Roofer | Illinois |
| 31 | Stella Stalcup | 40 | Wife | — | Illinois |
| 32 | Phillis Stalcup | 5 | Daughter | — | Illinois |
| 33 | Lon Davis | 46 | Head | Blacksmith Helper | Illinois |
| 34 | Helen Davis | 44 | Wife | — | Illinois |
| 35 | Ruth Davis | 10 | Son | — | Illinois |
| 36 | Fay Davis | 11 | Daughter | — | Illinois |
| 37 | Shirley M. Davis THIS PERSON | 10 | Daughter | — | Illinois |
| 38 | Lyle Robert Davis | 8 | Son | — | Illinois |
| 39 | Janet Davis | 5 | 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)