HC
Helen Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washtenaw-County, Michigan
Our Model Tree links this Helen Campbell across the 1930 and 1940 US Censuses in Washtenaw-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 13-person household.
Age 15
b. ~1925
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washtenaw-County, Michigan |
| Surname | Campbell |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | YPSILANTI |
| 1935 Residence (County) | WASHTENAW |
| Additional Details | |
| Highest Grade | S 7 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Ypsilanti |
| Est. Birth Year | ~1925 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Grace Knox | Daughter | — | 20 | ~1920 |
| Helen Campbell | Daughter | — | 15 | ~1925 |
| Mary Campbell | Daughter | — | 10 | ~1930 |
| Dorothy Knox | Daughter | — | 1 | ~1939 |
| Ruth Allen | Daughter | — | 18 | ~1922 |
| Josephine Campbell | Daughter | — | 25 | ~1915 |
| William Campbell | Head | — | 53 | ~1887 |
| Robert Knox | Other | — | 3 | ~1937 |
| Edward Knox | Other | — | 23 | ~1917 |
| Richard Campbell | Son | — | 18 | ~1922 |
| Elmer Campbell | Son | — | 12 | ~1928 |
| Raymond Campbell | Son | — | 22 | ~1918 |
| Bertha Campbell | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Washtenaw, Michigan
Daughter, age 4
Washtenaw, Michigan · implied b. ~1926 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Ohio |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Washtenaw-County, Michigan
Daughter, age 15
Washtenaw-County, Michigan · implied b. ~1925 — 13 household members
| Surname | Campbell |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | YPSILANTI |
| 1935 Residence (County) | WASHTENAW |
| Highest Grade | S 7 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Helen Campbell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen Campbell
Daughter · 1940 · age 15 · b. ~1925 · Michigan
★ You are viewing this record
Sibling
Richard Campbell
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Campbell
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Knox
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Allen
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elmer Campbell
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Campbell
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Campbell
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Knox
Sibling · 1940 · age 1
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 — Washtenaw-County, Michigan
Open full size
1940 US Federal Census — Washtenaw-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01824-00734)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward G. Knight | 9 | Son | — | Michigan |
| 42 | M. Frances Knight | 50 | Head | Maid | Michigan |
| 43 | Frederick A. Grady | 35 | Nephew | Plumber'S Apprentice | Michigan |
| 44 | Fern Grady | 29 | Niece | — | Michigan |
| 45 | Dorothy L. Grady | 9 | Daughter | — | Michigan |
| 46 | James F. Grady | 7 | Son | — | Michigan |
| 47 | Willie B. English | 28 | Lodger | Shake-Out Man | Texas |
| 48 | Mary E. English | 32 | Wife | Housework | Oklahoma |
| 49 | John H. Fuller | 58 | Head | The Setter | Michigan |
| 50 | Elmo Holmes | 46 | Head | Main Wright | Oklahoma |
| 51 | Anna Ladd | 30 | Housekeeper | Housekeeper | Alabama |
| 52 | Estelle Williams | 67 | Mother | — | Alabama |
| 53 | George Thomas | 51 | Lodger | Fireman | Mississippi |
| 54 | Elsie Thomas | 34 | Wife | — | Alabama |
| 55 | T. J. Campbell | 34 | Lodger | Metal Pourer | Arkansas |
| 56 | Willie M. Campbell | 27 | Wife | — | Missouri |
| 57 | Robert L. Johnson | 33 | Lodger | Production Laborer | Texas |
| 58 | Lily Q. Johnson | 26 | Wife | Maid | Oklahoma |
| 59 | William Campbell | 53 | Head | Janitor | Michigan |
| 60 | Bertha Campbell | 44 | Wife | — | Ohio |
| 61 | Josephine Campbell | 25 | Daughter | General Housework | Ohio |
| 62 | Raymond Campbell | 22 | Son | Truck Driver | Ohio |
| 63 | Richard Campbell | 18 | Son | New Worker | Michigan |
| 64 | Helen Campbell THIS PERSON | 15 | Daughter | — | Michigan |
| 65 | Elmer Campbell | 12 | Son | — | Michigan |
| 66 | Mary Campbell | 10 | Daughter | — | Michigan |
| 67 | Edward Knox | 23 | Son-in-law | Wpa Building Project | Michigan |
| 68 | Grace Knox | 20 | Daughter | — | Ohio |
| 69 | Robert L. Knox | 3 | Grandson | — | Michigan |
| 70 | Dorothy D. Knox | 1 | Daughter | — | Michigan |
| 71 | Ruth Allen | 18 | Daughter | General Housework | Ohio |
| 72 | Timothy Cash | 39 | Head | Metal Pourer | Arkansas |
| 73 | Rozetta Crosby | 20 | Lodger | Janitress | Michigan |
| 74 | Emma Gates | 23 | Lodger | General Housework | Georgia |
| 75 | Anna Cunningham | 30 | Lodger | General Housework | Georgia |
| 76 | Odell, H. Morgan | 25 | Lodger | Metal Pourer | Arkansas |
| 77 | Bertha R. Russell | 29 | Lodger | General Housework | Arkansas |
| 78 | John F. E. Hendricks | 43 | Head | Minister | Massachusetts |
| 79 | Mary A. Hendricks | 52 | Wife | — | England |
| 80 | Burton N. Hendricks | 14 | Son | — | Michigan |
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)