WP
William Phelps — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this William Phelps across the 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Phelps |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Waterloo City |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Robert Phelps | Son | — | 21 | ~1919 |
| William Phelps | Head | — | 49 | ~1891 |
| Elsie Phelps | Daughter | — | 21 | ~1919 |
| Mary Phelps | Spouse | — | 47 | ~1893 |
| Betty Phelps | Daughter | — | 9 | ~1931 |
| William Phelps | Son | — | 12 | ~1928 |
| Dora Phelps | Other | — | 71 | ~1869 |
Census Appearances
1930
Black Hawk, …
Son, age 2
Black Hawk, Iowa · implied b. ~1928 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Phelps |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Washington |
| Mother's Birthplace | Ohio |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Son, age 12
Black-Hawk-County, Iowa · implied b. ~1928 — 7 household members
| Surname | Phelps |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Highest Grade | No 5 |
| 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 Phelps across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Phelps
Son · 1940 · age 12 · b. ~1928 · Iowa
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Sibling
Elsie Phelps
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Phelps
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Phelps
Sibling · 1940 · age 21
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 — Black-Hawk-County, Iowa
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1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01140-00434)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ernst H. Weber | 66 | Father | Janitor | Germany |
| 42 | Bertha L. Weber | 61 | Mother | Housewife | Iowa |
| 43 | Wayne W. Weber | 31 | Head | Office Employee | Iowa |
| 44 | Anha L. Weber | 30 | Wife | Housewife | Iowa |
| 45 | Raymond E. Shannon | 40 | Head | Clerk | Iowa |
| 46 | Evelyn C. Shannon | 46 | Wife | Housewife | Iowa |
| 47 | Herman H. Spohr | 54 | Head | Salesman | Iowa |
| 48 | Bessie R. Spohr | 52 | Wife | Housewife | California |
| 49 | Bessie M. Spohr | 33 | Daughter | Secy | Iowa |
| 50 | James H. Schmidt | 41 | Head | Meat Inspector | Iowa |
| 51 | Lena O. Schmidt | 38 | Wife | Housewife | Iowa |
| 52 | James H. Schmidt | 19 | Son | Parts Clerk | Minnesota |
| 53 | Ladonne M. Stewart | 17 | Daughter | — | Iowa |
| 54 | Henry F. Hoffer | 39 | Head | Asst Cashier | Iowa |
| 55 | Frances K. Hoffer | 34 | Wife | Housewife | Iowa |
| 56 | Helen N. Thull | 32 | Sister Law | Artist | Iowa |
| 57 | Edward H. Thiemann | 53 | Head | Cooper | Iowa |
| 58 | Albina Thiemann | 56 | Wife | Housewife | Germany |
| 59 | Jeanette L. Thiemann | 20 | Daughter | Stenographer | Iowa |
| 60 | Wendell K. Thiemann | 19 | Son | Office Clerk | Iowa |
| 61 | Oscar W. Hansen | 61 | Head | Machinist | Pennsylvania |
| 62 | Florence B. Hansen | 56 | Wife | Housewife | Indiana |
| 63 | Thomas B. Hansen | 22 | Son | Engineer | Iowa |
| 64 | Allan Hansen | 18 | Son | Paper Carrier | Iowa |
| 65 | Cyril W. Jacobs | 34 | Head | Sales Clerk | Iowa |
| 66 | Lura B. Jacobs | 29 | Wife | Secy Work | Iowa |
| 67 | Bernice Woodrum | 22 | Sister Law | Stenographer | Iowa |
| 68 | End Of Block On Grant Hammond Locust And Randolph Sts | None | — | — | — |
| 69 | Orville A. Backens | 30 | Head | Credit Dept | Iowa |
| 70 | Lucy A. Backens | 32 | Wife | Housewife | Iowa |
| 71 | Larry R. Backens | 4 | Son | — | Iowa |
| 72 | Keith E. Crooks | 25 | Lodger | Machinist | Iowa |
| 73 | William Phelps | 49 | Head | Carpenter | Washington |
| 74 | Mary D. Phelps | 47 | Wife | Housewife | Ohio |
| 75 | Elsie A. Phelps | 21 | Daughter | — | Iowa |
| 76 | Robert D. Phelps | 21 | Son | Labour | Iowa |
| 77 | William J. Phelps THIS PERSON | 12 | Son | — | Iowa |
| 78 | Betty A. Phelps | 9 | Daughter | — | Iowa |
| 79 | Dora Phelps | 71 | Mother | Housewife | Missouri |
| 80 | Albert P. Blough | 73 | Head | Pastor | Pennsylvania |
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)