PA
Peter Anderson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this Peter Anderson across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed), with identified parents Christ & Sena — first a son (b.~1911), then head of a 2-person household.
Age 29
b. ~1911
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Anderson |
| Given Name | Peter |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Falls City |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Occupation | Assistant Caretaker |
| Industry | Public Park |
| Class of Worker | PW |
| Hours Worked | 22 |
| Income (1939) | 904 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Assistant Caretaker |
| Township / Ward | Cedar Falls City |
| Est. Birth Year | ~1911 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Peter | Age | Birth yr |
|---|---|---|---|---|
| Sena Anderson | Head | — | 67 | ~1873 |
| Peter Anderson | Son | — | 29 | ~1911 |
Census Appearances
1920
Black Hawk, …
Son, age 10
Black Hawk, Iowa · implied b. ~1910 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Peter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Black Hawk, …
Son, age 20
Black Hawk, Iowa · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Andersen |
| Given Name | Peter C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Laborer |
| Industry | Cement Gang |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Son, age 29
Black-Hawk-County, Iowa · implied b. ~1911 — 2 household members
| Surname | Anderson |
| Given Name | Peter |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Falls City |
| 1935 Residence (County) | Black Hawk |
| Occupation | Assistant Caretaker |
| Industry | Public Park |
| Class of Worker | PW |
| Hours Worked | 22 |
| Income (1939) | 904 |
| Highest Grade | 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 Peter Anderson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Christ Anderson (~0.92 confidence) and mother Sena Anderson (~0.92 confidence) and mother Lena Anderson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Christ Anderson
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Sena Anderson
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Lena Anderson
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Peter Anderson
Son · 1940 · age 29 · b. ~1911 · 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 — 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-t0627-01139-00235)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Audrey Grace Paet Prof | 21 | daughter | College | Iowa |
| 2 | Helen Church | 23 | Lodger | Desk Attendant | Indiana |
| 3 | A. W. Moore | 66 | Head | Salesman | Iowa |
| 4 | Kyle Moore | 64 | Wife | — | Iowa |
| 5 | Merle Stout | 44 | Head | Machinist | Pennsylvania |
| 6 | Margaret Stout | 38 | Wife | — | Iowa |
| 7 | Helen Stout | 16 | daughter | Roundabout | Iowa |
| 8 | Kenneth Stout | 13 | son | — | Iowa |
| 9 | Eugene Stout | 12 | son | — | Iowa |
| 10 | John Thomas Stout | 1 | son | — | Iowa |
| 11 | — | None | — | — | — |
| 12 | L. K. Hatch | 33 | Head | Printer | Iowa |
| 13 | Bertha Hatch | 30 | Wife | — | Iowa |
| 14 | Laurel Hatch | 11 | daughter | — | Iowa |
| 15 | Robert Hatch | 10 | son | — | Iowa |
| 16 | David Hatch | 8 | son | — | Iowa |
| 17 | John Michael Hatch | 2 | son | — | Iowa |
| 18 | Sena Anderson | 67 | Head | — | Denmark |
| 19 | Peter Anderson THIS PERSON | 29 | son | Assistant Caretaker | Iowa |
| 20 | Elmer Masterson | 48 | Head | Car Salesman | Iowa |
| 21 | Elizabeth Masterson | 48 | Wife | — | Illinois |
| 22 | James Masterson | 22 | son | Shoe Salesman | Iowa |
| 23 | Robert Masterson | 16 | son | — | Iowa |
| 24 | Donald Masterson | 9 | son | — | Iowa |
| 25 | N. S. Anderson | 39 | Head | Traveling Salesman | Iowa |
| 26 | Chrystal Anderson | 38 | Wife | Saleslady | Iowa |
| 27 | Maxine Anderson | 19 | daughter | — | Iowa |
| 28 | Hans Jensen | 77 | Grand father in law | — | Denmark |
| 29 | W. S. Boyd | 36 | Head | Assembly Room | Iowa |
| 30 | Danita Boyd | 36 | Wife | — | Iowa |
| 31 | Mary Elizabeth Boyd | 9 | daughter | — | Illinois |
| 32 | Daniel Strickler Boyd | 4 | son | — | Iowa |
| 33 | J. E. Strickler | 75 | Father in law | — | Illinois |
| 34 | Mary Strickler | 77 | Mother in law | — | Iowa |
| 35 | G. W. Mattes | 62 | Head | Metal Pattern Maker | Iowa |
| 36 | Dorothea Mattes | 60 | Wife | — | Iowa |
| 37 | Ralph Mattes | 30 | son | Mechanic | Iowa |
| 38 | Gladys Mattes | 25 | daughter in law | Waitress | Iowa |
| 39 | Mary Ann Mattes | 82 | Mother | — | Iowa |
| 40 | Edward Adamson | 28 | Head | Mechanic | Missouri |
Related Census Records
Pedigree Summary
Peter
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)