LS
Lucille Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this Lucille Smith across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed), with identified parents William & William — first a daughter (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Female
Daughter
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Smith |
| Given Name | Lucille |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Occupation | Recreation Leader |
| Industry | Recreation Center |
| Class of Worker | GW |
| Hours Worked | 32 |
| Income (1939) | 794 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Recreation Leader |
| Township / Ward | Waterloo City |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lucille | Age | Birth yr |
|---|---|---|---|---|
| Gladys Robinson | Daughter | — | 26 | ~1914 |
| Lucille Smith | Daughter | — | 23 | ~1917 |
| Ethel Robinson | Head | — | 56 | ~1884 |
| James Smith | Other | — | 26 | ~1914 |
| Thomas Robinson | Son | — | 19 | ~1921 |
Census Appearances
Daughter, age 2
Black Hawk, Iowa · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Lucile R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Black Hawk, …
Daughter, age 12
Black Hawk, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Lucille |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Daughter, age 23
Black-Hawk-County, Iowa · implied b. ~1917 — 5 household members
| Surname | Smith |
| Given Name | Lucille |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Occupation | Recreation Leader |
| Industry | Recreation Center |
| Class of Worker | GW |
| Hours Worked | 32 |
| Income (1939) | 794 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Lucille Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Smith (~0.92 confidence) and father William Smith (~0.92 confidence) and mother Leora Smith (~0.92 confidence) and mother Ethel Robinson (~0.92 confidence) and mother Edna Smith (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Smith
b. ~1877
Source father
● Household
· direct · ~0.92
Father
William Smith
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Leora Smith
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Ethel Robinson
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Edna Smith
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lucille Smith
Daughter · 1940 · age 23 · b. ~1917 · Iowa
★ You are viewing this record
Sibling
Thomas Robinson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gladys Robinson
Sibling · 1940 · age 26
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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01140-00845)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gerald Putnam | 27 | Head | Union Organizer | Iowa |
| 42 | Mary A Putnam | 28 | Wife | — | Iowa |
| 43 | Donald Putnam | 2 | Son | — | Iowa |
| 44 | Ethel P. Robinson | 56 | Head | — | Iowa |
| 45 | Gladys E. Robinson | 26 | Daughter | Telephone Operator | Iowa |
| 46 | Thomas V. Robinson | 19 | Son | Auditor | Iowa |
| 47 | James Smith | 26 | Son-in-law | Laborer | Iowa |
| 48 | Lucille Smith THIS PERSON | 23 | Daughter | Recreation Leader | Iowa |
| 49 | Fred J. Uhn | 69 | Head | Locomotive Fireman | Germany |
| 50 | Nancy G. Uhn | 67 | Wife | — | Ohio |
| 51 | Sarah J. Berland | 87 | Mother-in-law | — | New York |
| 52 | Jesse B. Smith | 52 | Head | Crane Operator | Iowa |
| 53 | Nettie Smith | 46 | Wife | Clothing Sorter | Iowa |
| 54 | Lawrence Molstead | 26 | Son-in-law | Lathe Operator | Iowa |
| 55 | Hazel Molstead | 22 | Daughter | — | Iowa |
| 56 | Robert Molstead | 2 | Grandson | — | Iowa |
| 57 | Jayne Molstead | 2 | Granddaughter | — | Iowa |
| 58 | Leona Weber | 31 | Sister-in-law | — | Iowa |
| 59 | Wayne Weber | 16 | Nephew | Paper Route | Iowa |
| 60 | James Weber | 14 | Nephew | Paper Route | Iowa |
| 61 | George Weber | 11 | Nephew | — | Iowa |
| 62 | Polly Ann Smith | 93 | Mother | — | Michigan |
| 63 | Mary North | 27 | Daughter | Trained Nurse | Iowa |
| 64 | Oliver Jenkins | 30 | Head | Machinist | Iowa |
| 65 | Irma Jenkins | 27 | Wife | — | Iowa |
| 66 | Patricia Jenkins | 4 | Daughter | — | Iowa |
| 67 | Shirley Mae Jenkins | 3 | Daughter | — | Iowa |
| 68 | Charles Manson | 64 | Head | Laborer | Iowa |
| 69 | Mildred Manson | 60 | Wife | — | Iowa |
| 70 | Dale G. Manson | 22 | Son | Cook | Iowa |
| 71 | Lillian Manson | 23 | Daughter-in-law | Caterer | Iowa |
| 72 | Lillian Manson | 23 | Daughter-in-law | — | Iowa |
| 73 | George A. Plummer | 39 | Head | Press Operator | Iowa |
| 74 | Mary E. Plummer | 29 | Wife | Assembly Line | Iowa |
| 75 | Mildred Plummer | 11 | Daughter | — | Iowa |
| 76 | Beverly Plummer | 9 | Daughter | — | Iowa |
| 77 | Elouise Plummer | 7 | Daughter | — | Iowa |
| 78 | Johnny Plummer | 5 | Son | — | Iowa |
| 79 | William Manson | 37 | Son | Laborer | Iowa |
| 80 | Edna Manson | 11 | Granddaughter | — | Iowa |
Related Census Records
Pedigree Summary
Lucille + 2 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)