JF
John Ferguson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this John Ferguson across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Ferguson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Waterloo City |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Thomas Ferguson | Head | — | 49 | ~1891 |
| 400 End Of Block | Other | — | 100 | ~1840 |
| John Ferguson | Son | — | 21 | ~1919 |
| Franc Ferguson | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Black Hawk, …
Son, age 1
Black Hawk, Iowa · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ferguson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Texas |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Black Hawk, …
Son, age 11
Black Hawk, Iowa · implied b. ~1919 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ferguson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Age at First Marriage | 11 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Texas |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Son, age 21
Black-Hawk-County, Iowa · implied b. ~1919 — 4 household members
| Surname | Ferguson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Class of Worker | 0 |
| Highest Grade | C 3 |
| 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 John Ferguson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Ferguson (~0.92 confidence) and father Thomas Ferguson (~0.92 confidence) and mother Irene Ferguson (~0.92 confidence) and mother Franc Ferguson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Ferguson
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Thomas Ferguson
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Irene Ferguson
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Franc Ferguson
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Ferguson
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 — 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-t0627-01140-00724)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emmet Miller | 52 | Head | Salesman | Iowa |
| 2 | Hattie Miller | 45 | Wife | — | Minnesota |
| 3 | Ann Miller | 10 | Daughter | — | Iowa |
| 4 | Dina Nelson | 73 | Mother | — | Minnesota |
| 5 | Curtis Paine | 41 | Head | Owner | Kansas |
| 6 | Bernice Paine | 29 | Wife | — | Kansas |
| 7 | Wallace Lee Paine | 8 | Son | — | Kansas |
| 8 | Rita Katherine Paine | 5 | Daughter | — | Kansas |
| 9 | Juliana Paine | 3 | Daughter | — | Kansas |
| 10 | Donna Francis Paine | 1 | Daughter | — | Kansas |
| 11 | William Arildsen | 47 | Head | Salesman | Iowa |
| 12 | Gladys Arildsen | 39 | Wife | Collector | Iowa |
| 13 | Patricia Arildsen | 10 | Daughter | — | Iowa |
| 14 | Richard Arildsen | 7 | Son | — | Iowa |
| 15 | 1600 Riehl End Of Block | None | 510 Riverside | — | — |
| 16 | James Morgan | 39 | Head | Collector | Illinois |
| 17 | Ardath Morgan | 39 | Wife | — | Iowa |
| 18 | Wilhelmina Silbig | 71 | Head | — | Illinois |
| 19 | William Allen | 49 | Son in law | Fireman | Iowa |
| 20 | Vada M Allen | 33 | Daughter | — | Iowa |
| 21 | Irvin M Banfield | 42 | Head | Salesman | Iowa |
| 22 | Stella M Banfield | 42 | Wife | Sales Lady | New York |
| 23 | Richard J Banfield | 17 | Son | — | Iowa |
| 24 | Thomas W Ferguson | 49 | Head | General Agent | Missouri |
| 25 | Franc Ferguson | 45 | Wife | Freight Solicitor | Texas |
| 26 | John Ferguson THIS PERSON | 21 | Son | — | Iowa |
| 27 | 400 Riverside End Of Block | 100 | Drive | — | — |
| 28 | Hillary Robert Irish | 22 | Head | Assembly | Iowa |
| 29 | Mary E Irish | 22 | Wife | — | Iowa |
| 30 | Robert Leroy Irish | 3 | Son | — | Iowa |
| 31 | James M Irish | 1 | Son | — | Iowa |
| 32 | Carl R George | 23 | Head | Laborer | Iowa |
| 33 | Ardilla M George | 23 | Wife | — | Iowa |
| 34 | Lloyd Smith | 19 | Lodger | Typist | Iowa |
| 35 | Don Harlan | 18 | Lodger | Office | Iowa |
| 36 | Ernest Goffie | 20 | Lodger | Typist | Iowa |
| 37 | Oma Glessner | 32 | Head | Leasee | Iowa |
| 38 | Mildred Glessner | 32 | Wife | — | Iowa |
| 39 | Marlys Jean Glessner | 10 | Daughter | — | Iowa |
| 40 | Shirley Ann Glessner | 1 | Daughter | — | Iowa |
Pedigree Summary
John
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)