IT
Ida Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Ida Thomas across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Female
Daughter
Born: Mississippi
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Thomas |
| Given Name | Ida Mae |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | New Worker |
| Highest Grade | No H-2 |
| 1935 Residence | Same Place |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
| Occupation | New Worker |
| Township / Ward | Chicago |
| Est. Birth Year | ~1922 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ida | Age | Birth yr |
|---|---|---|---|---|
| Ernestine Thomas | Daughter | — | 6 | ~1934 |
| Johnnie Thomas | Daughter | — | 16 | ~1924 |
| Bernice Thomas | Daughter | — | 14 | ~1926 |
| Jessie Thomas | Daughter | — | 13 | ~1927 |
| Ida Thomas | Daughter | — | 18 | ~1922 |
| Jennie Thomas | Head | — | 46 | ~1894 |
| Juanita Thomas | Other | — | ~1940 | |
| Ira Farmer | Other | — | 24 | ~1916 |
| Louis Thomas | Son | — | 4 | ~1936 |
| Louise Thomas | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Cook, Illinois
Daughter, age 9
Cook, Illinois · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ida M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Mississippi |
| Father's Birthplace | Mississippi |
| Mother's Birthplace | Mississippi |
| Can Read/Write | Yes |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
1940
Cook-County, Illinois
Daughter, age 18
Cook-County, Illinois · implied b. ~1922 — 10 household members
| Surname | Thomas |
| Given Name | Ida Mae |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Mississippi |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | New Worker |
| Highest Grade | No H-2 |
| 1935 Residence | Same Place |
| Birth State | Mississippi |
| Birth Country | United States |
| Birthplace (normalized) | mississippi |
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 Ida Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ida Thomas
Daughter · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Jessie Thomas
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Thomas
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Johnnie Thomas
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Thomas
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernestine Thomas
Sibling · 1940 · age 6
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00923-00071)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sallie Ayala | 42 | Wife | Shirt Finisher | Mississippi |
| 42 | Sarah Howard | 42 | Lodger | Shirt Finisher | Louisiana |
| 43 | La Salle Evans | 23 | Lodger | Dancer | Mississippi |
| 44 | Fannie C. Evans | 26 | Wife of Lodger | Beautician | Louisiana |
| 45 | La Salle Jr. Evans | 4 | Son of Lodger | — | Illinois |
| 46 | Jennie Thomas | 46 | Head | Laborer | Mississippi |
| 47 | Louise Thomas | 38 | Wife | — | Mississippi |
| 48 | Ida Mae Thomas THIS PERSON | 18 | Daughter | New Worker | Mississippi |
| 49 | Johnnie Mae Thomas | 16 | Daughter | — | Ohio |
| 50 | Bernice Thomas | 14 | Daughter | — | Ohio |
| 51 | Jessie M Thomas | 13 | Daughter | — | Illinois |
| 52 | Ernestine Thomas | 6 | Daughter | — | Illinois |
| 53 | Louis Thomas | 4 | Son | — | Illinois |
| 54 | Juanita Thomas | 0 | Grand Daughter | — | Illinois |
| 55 | Ira Farmer | 24 | Lodger | Common Laborer | Mississippi |
| 56 | Hester Foote | 44 | Head | Maid | Mississippi |
| 57 | John Foote | 15 | Son | — | Illinois |
| 58 | Bernice Foote | 13 | Daughter | — | Illinois |
| 59 | Susie Yates | 56 | Head | — | Louisiana |
| 60 | Alfred Palmer | 43 | Lodger | Grader - Dirt | Illinois |
| 61 | Maggie Bracey | 52 | Head | — | Mississippi |
| 62 | Nora L. Adams | 38 | Daughter | Presser | Mississippi |
| 63 | Edward S Adams | 37 | Son | — | Mississippi |
| 64 | Edward S. Jr. Adams | 7 | Grandson | — | Illinois |
| 65 | Wilbur Adams | 6 | Grandson | — | Illinois |
| 66 | Patricia Adams | 4 | Grand Daughter | — | Illinois |
| 67 | Riley Stevenson | 24 | Head | Porter | Illinois |
| 68 | Helen Stevenson | 21 | Wife | — | Illinois |
| 69 | Lillian Mason | 50 | Mother-in-law | — | Kentucky |
| 70 | Lena Gray | 57 | Head | Maid | Mississippi |
| 71 | Eugene Anderson | 56 | Lodger | Janitor | Tennessee |
| 72 | Angeline Jarrett | 54 | Head | Seamstress | Tennessee |
| 73 | Archie Jarrett | 30 | Son | Construction Worker | Tennessee |
| 74 | Ada Ware | 65 | Sister | — | Tennessee |
| 75 | Beaulah Gill | 30 | Lodger | — | Mississippi |
| 76 | Rudolph Gill | 14 | Son of Lodger | — | Mississippi |
| 77 | Oscar Gill | 12 | Son of Lodger | — | Mississippi |
| 78 | Annie Parker | 34 | Head | — | Georgia |
| 79 | Mabel Parker | 13 | Daughter | — | Illinois |
| 80 | Mcalbert Parker | 12 | Son | — | Illinois |
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)