CN
Charles Nichols — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Iowa
Our Model Tree links this Charles Nichols across the 1910, 1920, 1930 and 1940 US Censuses in Marion-County, Iowa (XGBoost, ~Confirmed), with identified parents Fred & William — first a head (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Iowa |
| Surname | Nichols |
| Given Name | Charles H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Knoxville Twp. |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Building Industry |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 308 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Carpenter |
| Township / Ward | Knoxville Twp |
| Est. Birth Year | ~1902 |
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 Charles | Age | Birth yr |
|---|---|---|---|---|
| Dolores Nichols | Daughter | — | 10 | ~1930 |
| Charles Nichols | Head | — | 38 | ~1902 |
| James Nichols | Son | — | 8 | ~1932 |
| Dwight Nichols | Son | — | 6 | ~1934 |
| Robert Nichols | Son | — | 13 | ~1927 |
| Opal Nichols | Spouse | — | 32 | ~1908 |
Census Appearances
1910
Marion, Iowa
Son, age 8
Marion, Iowa · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Charlie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Missouri |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Marion, Iowa
Son, age 18
Marion, Iowa · implied b. ~1902 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | Lumber Yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Marion, Iowa
Head, age 28
Marion, Iowa · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Charles H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 25 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Carpenter |
| Industry | Rail Road |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 17 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marion-County, Iowa
Head, age 38
Marion-County, Iowa · implied b. ~1902 — 6 household members
| Surname | Nichols |
| Given Name | Charles H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Knoxville Twp. |
| 1935 Residence (County) | Marion |
| Occupation | Carpenter |
| Industry | Building Industry |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 308 |
| Highest Grade | No 8 |
| 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 Charles Nichols across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fred Nichols (~0.92 confidence) and father William Nichols (~0.92 confidence) and mother Ollie Nichols (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Nichols
b. ~1875
Source father
● Household
· direct · ~0.92
Father
William Nichols
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Ollie Nichols
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Charles Nichols
Head · 1940 · age 38 · b. ~1902 · 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 — Marion-County, Iowa
Open full size
1940 US Federal Census — Marion-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01181-00410)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hazel Fritzgeralds | 8 | Daughter | — | Iowa |
| 2 | Dan L. Marsh | 45 | Head | Operator | Iowa |
| 3 | Carrie Marsh | 45 | Wife | — | Iowa |
| 4 | Daniel L. Jr. Marsh | 20 | Son | Assistant To Operator | Iowa |
| 5 | Lawrence Clark | 67 | Head | Operator | Iowa |
| 6 | Jennie Clark | 66 | Wife | — | Iowa |
| 7 | Fred F. Scheele | 49 | Head | Operator | Germany |
| 8 | Oto D. Scheele | 31 | Son | Operator | Iowa |
| 9 | William H. Caulkins | 65 | Head | Operator & Farm | Iowa |
| 10 | Mossie R. Caulkins | 64 | Wife | — | Iowa |
| 11 | Beulah F. Caulkins | 37 | Daughter | — | Iowa |
| 12 | Jessie O. Reeves | 45 | Head | Operator | Iowa |
| 13 | Zella E. Reeves | 44 | Wife | — | Iowa |
| 14 | May Evans | 63 | Head | Operator | Iowa |
| 15 | David Evans | 24 | Son | Assistant To Operator | Iowa |
| 16 | Naomi Evans | 23 | Daughter in law | — | Iowa |
| 17 | Frank Woodle | 65 | Head | Operator | Iowa |
| 18 | Nancy A. Woodle | 64 | Wife | — | Iowa |
| 19 | Walter R. Woodle | 24 | Son | Assistant To Operator | Iowa |
| 20 | Floyd E. Black | 48 | Head | Operator | Iowa |
| 21 | Effie Black | 46 | Wife | — | Kansas |
| 22 | Richard L. Black | 20 | Son | Assistant To Operator | Iowa |
| 23 | William O. Hancock | 60 | Head | Operator | Indiana |
| 24 | Mary Hancock | 56 | Wife | — | Indiana |
| 25 | Sara Jones | 62 | Head | Operator Of Farm | Iowa |
| 26 | Eric G. Quist | 43 | Boarder | Assistant Of Farm | Sweden |
| 27 | Eliza V. Quist | 43 | Wife | — | Iowa |
| 28 | Charles H. Nichols THIS PERSON | 38 | Head | Carpenter | Iowa |
| 29 | Opal M. Nichols | 32 | Wife | — | Iowa |
| 30 | Robert A. Nichols | 13 | Son | — | Iowa |
| 31 | Dolores Nichols | 10 | Daughter | — | Iowa |
| 32 | James Nichols | 8 | Son | — | Iowa |
| 33 | Dwight Nichols | 6 | Son | — | Iowa |
| 34 | Clarence Sockriter | 45 | Head | Gardner | Iowa |
| 35 | Ruby Sockriter | 42 | Wife | — | Iowa |
| 36 | Gloria L. Sockriter | 17 | Daughter | — | Iowa |
| 37 | Clarence Jr. Sockriter | 15 | Son | — | Iowa |
| 38 | John A. Dennison | 31 | Head | Milk Route | Iowa |
| 39 | Myrtall Dennison | 33 | Wife | — | Wyoming |
| 40 | Larry J. Dennison | 3 | Son | — | Iowa |
Pedigree Summary
Charles
Gen 1 · 3 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)