LS
Lydia Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Lydia Smith across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 6-person household.
Age 49
b. ~1891
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Smith |
| Given Name | Lydia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | C-2 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Rich Twp |
| Est. Birth Year | ~1891 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lydia | Age | Birth yr |
|---|---|---|---|---|
| Paul Smith | Head | — | 49 | ~1891 |
| Paul Smith | Son | — | 22 | ~1918 |
| Irwin Smith | Son | — | 19 | ~1921 |
| Maurice Smith | Son | — | 17 | ~1923 |
| Bruce Smith | Son | — | 10 | ~1930 |
| Lydia Smith | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Cook, Illinois
Spouse, age 39
Cook, Illinois · implied b. ~1891 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Lydia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 49
Cook-County, Illinois · implied b. ~1891 — 6 household members
| Surname | Smith |
| Given Name | Lydia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | C-2 |
| 1935 Residence | Illinois |
| 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 Lydia Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lydia Smith
Spouse · 1940 · age 49 · b. ~1891 · Illinois
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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
39 people indexed on this census page (nara:1940:m-t0627-00788-00417)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alara Johnson | 59 | Wife | — | Wisconsin |
| 2 | Carl A. Howard | 47 | Head | Switchman | Iowa |
| 3 | Margaret Howard | 47 | Wife | — | Illinois |
| 4 | Henry C. Howard | 24 | Son | Switchman | Iowa |
| 5 | Rose Howard | 18 | Daughter | New Worker | Iowa |
| 6 | Pauline Howard | 13 | Daughter | — | Illinois |
| 7 | Irene Howard | 9 | Daughter | — | Illinois |
| 8 | Rufus Tarney | 17 | Nephew | — | Iowa |
| 10 | Ralph A. Brown | 48 | Head | Superintendent | Georgia |
| 11 | Alice Brown | 35 | Wife | — | Nebraska |
| 12 | Bette Anne Brown | 1 | Daughter | — | Illinois |
| 13 | Frederick Sieloff | 44 | Head | Truck Dispatcher | Illinois |
| 14 | Alvina Sieloff | 47 | Wife | — | Illinois |
| 15 | Paul M. Smith | 49 | Head | Cattle Inspector | Illinois |
| 16 | Lydia Smith THIS PERSON | 49 | Wife | — | Illinois |
| 17 | Paul Jr. Smith | 22 | Son | Clerk | Nebraska |
| 18 | Irwin Smith | 19 | Son | Clerk | Nebraska |
| 19 | Maurice Smith | 17 | Son | — | Illinois |
| 20 | Bruce Smith | 10 | Son | — | Illinois |
| 21 | George W. Borman | 25 | Head | Elevator Operator | Illinois |
| 22 | Mary Borman | 64 | Mother | — | Illinois |
| 23 | Ella Borman | 30 | Sister | Clerk | Illinois |
| 24 | Lawrence F. Bode | 45 | Head | Farmer | Illinois |
| 25 | Alma Bode | 45 | Wife | — | Illinois |
| 26 | Sylvia Bode | 17 | Daughter | — | Illinois |
| 27 | Selma Bode | 17 | Daughter | Housekeeper | Illinois |
| 28 | Allen Bode | 9 | Son | — | Illinois |
| 29 | Margaret Krumwiede | 72 | Head | — | Illinois |
| 30 | Frieda Krumwiede | 43 | Daughter | — | Illinois |
| 31 | Herbert H. Kohl | 23 | Head | Farmer | Illinois |
| 32 | Lillian Kohl | 23 | Wife | — | Illinois |
| 33 | Robert Kohl | 4 | Daughter | — | Illinois |
| 34 | Sharon Kohl | 1 | Daughter | — | Illinois |
| 35 | Louise Dettmering | 52 | Mother-in-law | — | Illinois |
| 36 | Martin Bruder | 40 | Head | Farmer | Germany |
| 37 | Hulda Bruder | 40 | Wife | — | Illinois |
| 38 | Esther Bruder | 6 | Daughter | — | Illinois |
| 39 | Ella Bruder | 5 | Daughter | — | Illinois |
| 40 | Martin Jr. Bruder | 2 | Son | — | 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)