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William Nichols — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, Iowa
Our Model Tree links this William Nichols across the 1920, 1930 and 1940 US Censuses in Union-County, Iowa (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, Iowa |
| Surname | Nichols |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Arispe Town. |
| 1935 Residence (County) | Union County |
| Additional Details | |
| Occupation | Helper |
| Industry | Produce Station |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 200 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Helper |
| Township / Ward | Arispe Town |
| Est. Birth Year | ~1919 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Nichols | Head | — | 46 | ~1894 |
| William Nichols | Son | — | 21 | ~1919 |
| Illa Nichols | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Union, Iowa
Son, age 1
Union, Iowa · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | William H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Union, Iowa
Son, age 11
Union, Iowa · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | William H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Union-County, Iowa
Son, age 21
Union-County, Iowa · implied b. ~1919 — 3 household members
| Surname | Nichols |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Arispe Town. |
| 1935 Residence (County) | Union County |
| Occupation | Helper |
| Industry | Produce Station |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 200 |
| Highest Grade | H 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 William Nichols across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Nichols (~0.92 confidence) and father William Nichols (~0.92 confidence) and mother Bertha Nichols (~0.92 confidence) and mother Illa Nichols (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Nichols
b. ~1894
Source father
● Household
· direct · ~0.92
Father
William Nichols
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Bertha Nichols
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Illa Nichols
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Nichols
Son · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Union-County, Iowa
Open full size
1940 US Federal Census — Union-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01208-00415)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ethan C. Nordstrom | 41 | Head | Superintendent | Iowa |
| 2 | Jean K. Nordstrom | 36 | Wife | — | Iowa |
| 3 | John Nordstrom | 12 | Son | — | Iowa |
| 4 | Clara E. D. Smith | 70 | Head | Proprietor | Ohio |
| 5 | Lena B. Johnston | 47 | Lodger | Teacher | Iowa |
| 6 | Cynthia W. Wilson | 78 | Head | — | Iowa |
| 7 | Robert W. Austin | 29 | Head | Barber | Iowa |
| 8 | Manera O. Austin | 28 | Wife | — | Missouri |
| 9 | Homer J. Wilson | 51 | Head | Postmaster | Iowa |
| 10 | Flossie M. Wilson | 50 | Wife | — | Nebraska |
| 11 | Verna Wilson | 19 | Daughter | — | Iowa |
| 12 | Clara B. Underwood | 76 | Head | — | Indiana |
| 13 | James Mckee | 75 | Head | — | Iowa |
| 14 | Sarah T. Mckee | 75 | Wife | — | Indiana |
| 15 | Robert Cheers | 61 | Head | Blade Operator | Iowa |
| 16 | Maude G. Cheers | 54 | Wife | — | Iowa |
| 17 | Louis G. Cheers | 33 | Son | Curb Builder | Iowa |
| 18 | Alden E. Cheers | 20 | Son | — | Iowa |
| 19 | Robert R. Cheers | 16 | Son | — | Iowa |
| 20 | Caroline Adophsen | 65 | Head | Farmer | Germany |
| 21 | Eda C. Adophsen | 39 | Daughter | Clerk | Iowa |
| 22 | Charles L. Richter | 12 | Grandson | — | Iowa |
| 23 | Oliver G. Coats | 59 | Head | Farmer | Iowa |
| 24 | Elizabeth H. Coats | 53 | Wife | Switchboard Operator | Iowa |
| 25 | Betty L. Coats | 18 | Daughter | — | Iowa |
| 26 | Ora S. Shank | 50 | Head | Farmer | Iowa |
| 27 | Dorothy M. Shank | 19 | Daughter | Teacher | Iowa |
| 28 | Mary J. Shank | 17 | Daughter | — | Iowa |
| 29 | Lester O. Gross | 39 | Head | Caterpillar Operator | Iowa |
| 30 | Opal Gross | 38 | Wife | — | Indiana |
| 31 | Arlyn M. Gross | 16 | Son | — | Colorado |
| 32 | Lester W. Gross | 14 | Son | — | Colorado |
| 33 | Richard D. Gross | 8 | Son | — | Iowa |
| 34 | Martin H. Whalen | 42 | Head | Signal Maintainer | Michigan |
| 35 | Rhoda G. Whalen | 47 | Wife | — | Montana |
| 36 | Robert G. Whalen | 6 | Son | — | Iowa |
| 37 | Bernard R. Whalen | 4 | Son | — | Iowa |
| 38 | William H. Nichols | 46 | Head | Proprietor | Iowa |
| 39 | Illa L. Nichols | 42 | Wife | — | Iowa |
| 40 | William H. Nichols THIS PERSON | 21 | Son | Helper | Iowa |
Pedigree Summary
William
Gen 1 · 4 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)