LJ
Lawrence Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Woodbury-County, Iowa
Our Model Tree links this Lawrence Johnson across the 1920, 1930 and 1940 US Censuses in Woodbury-County, Iowa (XGBoost, ~Confirmed), with identified parents Oscar & Claudia — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Woodbury-County, Iowa |
| Surname | Johnson |
| Given Name | Lawrence |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Sioux City |
| 1935 Residence (County) | Woodbury |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Sioux 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 Lawrence | Age | Birth yr |
|---|---|---|---|---|
| Frances Johnson | Daughter | — | 25 | ~1915 |
| Helen Johnson | Daughter | — | 26 | ~1914 |
| Oscar Johnson | Head | — | 63 | ~1877 |
| Lawrence Johnson | Son | — | 23 | ~1917 |
| Claudia Johnson | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Woodbury, Iowa
Son, age 2
Woodbury, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Lawrence E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Woodbury, Iowa
Son, age 12
Woodbury, Iowa · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Lawrence J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Woodbury-County, Iowa
Son, age 23
Woodbury-County, Iowa · implied b. ~1917 — 5 household members
| Surname | Johnson |
| Given Name | Lawrence |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Sioux City |
| 1935 Residence (County) | Woodbury |
| Hours Worked | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| 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 Lawrence Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Oscar Johnson (~0.92 confidence) and mother Claudia Johnson (~0.92 confidence) and father Oscar Johnson (~0.92 confidence) and mother Claudia Johnson (~0.92 confidence) and father Oscar Johnson (~0.92 confidence) and mother Clara Johnson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Oscar Johnson
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Claudia Johnson
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Oscar Johnson
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Claudia Johnson
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
Oscar Johnson
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Clara Johnson
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lawrence Johnson
Son · 1940 · age 23 · b. ~1917 · Iowa
★ You are viewing this record
Sibling
Frances Johnson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Johnson
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 — Woodbury-County, Iowa
Open full size
1940 US Federal Census — Woodbury-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01215-00056)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Katherine Wieling | 17 | daughter | — | Iowa |
| 2 | Isabel Wieling | 15 | daughter | — | Iowa |
| 3 | Frank E. Bartels | 42 | head | Credit Manager | Iowa |
| 4 | Anna Bartels | 41 | wife | — | Iowa |
| 5 | Felicia Lundgren | 70 | mother-in-law | — | England |
| 6 | Andrew Wilhelmson | 60 | head | Machinist | Sweden |
| 7 | Ida Wilhelmson | 55 | wife | — | Norway |
| 8 | Eleanor Wilhelmson | 25 | daughter | Clerk | Iowa |
| 9 | Esther Wilhelmson | 24 | daughter | Stenographer | Iowa |
| 10 | Ralph Pearson, A. | 54 | head | Carpenter | Sweden |
| 11 | Anna Pearson, A. | 49 | wife | — | Sweden |
| 12 | Florence Pearson, A. | 21 | daughter | Floor Lady | Iowa |
| 13 | Edgar O'Neal | 42 | head | Operator | Nebraska |
| 14 | Ruby O'Neal | 43 | wife | — | Iowa |
| 15 | Ellen Ruth O'Neal | 21 | daughter | — | Iowa |
| 16 | Frank W. O'Neal | 17 | son | — | Iowa |
| 17 | Paul E. Emmele | 40 | head | Boilermaker | Missouri |
| 18 | Rose Emmele | 38 | wife | — | Iowa |
| 19 | Donald Emmele | 14 | son | — | Iowa |
| 20 | Roger Emmele | 13 | son | — | Iowa |
| 21 | Frances Emmele | 11 | daughter | — | Iowa |
| 22 | Daniel Emmele | 3 | son | — | Iowa |
| 23 | Raymond Harrison | 24 | head | Laborer | Iowa |
| 24 | Lucille Harrison | 17 | wife | — | So. Dakota |
| 25 | Sharon Harrison | 1 | daughter | — | Iowa |
| 26 | William R. Burrell | 41 | head | Driver | Iowa |
| 27 | Zelda Burrell | 38 | wife | — | Missouri |
| 28 | Lois Burrell | 18 | daughter | New Worker | Iowa |
| 29 | Loris Burrell | 13 | daughter | — | Iowa |
| 30 | Maude Moore | 58 | mother-in-law | — | Nebraska |
| 31 | Russell Moore | 19 | brother-in-law | Driver | Iowa |
| 32 | Earl E. Limback | 46 | head | Collector | Nebraska |
| 33 | Florence Limback | 25 | wife | — | Iowa |
| 34 | Henry Limback | 82 | father | — | Illinois |
| 35 | Nancy Limback | 78 | mother | — | Illinois |
| 36 | Oscar O. Johnson | 63 | head | Blacksmith | Sweden |
| 37 | Claudia Johnson | 62 | wife | — | Iowa |
| 38 | Helen Johnson | 26 | daughter | Secretary | Texas |
| 39 | Frances Johnson | 25 | daughter | Housework | Texas |
| 40 | Lawrence Johnson THIS PERSON | 23 | son | — | Iowa |
Pedigree Summary
Lawrence + 2 siblings
Gen 1 · 6 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)