DC
David Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Olmsted-County, Minnesota
Our Model Tree links this David Campbell across the 1920, 1930 and 1940 US Censuses in Olmsted-County, Minnesota (XGBoost, ~Confirmed), with identified parents Harry & Harry — first a son (b.~1920), then head of a 6-person household.
Age 20
b. ~1920
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Olmsted-County, Minnesota |
| Surname | Campbell |
| Given Name | David H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Rochester |
| 1935 Residence (County) | Olmsted |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Rochester |
| Est. Birth Year | ~1920 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| Roger Campbell | Son | — | 8 | ~1932 |
| David Campbell | Son | — | 20 | ~1920 |
| Paul Campbell | Son | — | 18 | ~1922 |
| Florence Campbell | Spouse | — | 49 | ~1891 |
| Maxine Campbell | Daughter | — | 21 | ~1919 |
| Harry Campbell | Head | — | 55 | ~1885 |
Census Appearances
1920
Olmsted, Minnesota
Son, age
Olmsted, Minnesota · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Write | Yes |
| Speaks English | none |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Olmsted, Minnesota
Son, age 10
Olmsted, Minnesota · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Olmsted-County, Minnesota
Son, age 20
Olmsted-County, Minnesota · implied b. ~1920 — 6 household members
| Surname | Campbell |
| Given Name | David H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Rochester |
| 1935 Residence (County) | Olmsted |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 David Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Campbell (~0.92 confidence) and father Harry Campbell (~0.92 confidence) and father Harry Campbell (~0.92 confidence) and mother Florence Campbell (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Campbell
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Harry Campbell
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Harry Campbell
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Florence Campbell
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Campbell
Son · 1940 · age 20 · b. ~1920 · Minnesota
★ You are viewing this record
Sibling
Roger Campbell
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maxine Campbell
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Campbell
Sibling · 1940 · age 18
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 — Olmsted-County, Minnesota
Open full size
1940 US Federal Census — Olmsted-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01944-00329)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Caryl M. Boyer | 38 | Head | Nurse | Minnesota |
| 42 | Inez A. Boyer | 30 | Wife | — | Minnesota |
| 43 | Roger O. Boyer | 3 | Son | — | Minnesota |
| 44 | Wayne E. Boyer | 72 | Father | — | Minnesota |
| 45 | Alden Tressinger | 65 | Head | — | Minnesota |
| 46 | Birgetta Tressinger | 70 | Mother | — | Minnesota |
| 47 | James E. Martin | 50 | Head | Machine Worker | Kansas |
| 48 | Mildred D. Martin | 47 | Wife | — | Minnesota |
| 49 | Raymond R. Scholl | 23 | Head | New Worker | Iowa |
| 50 | Anna E. Scholl | 63 | Mother | Nurse | Minnesota |
| 51 | Edmund J. Dalsbo | 35 | Head | Office Manager | Minnesota |
| 52 | Marcella N. Dalsbo | 30 | Wife | — | Minnesota |
| 53 | Judith A. Dalsbo | 2 | Daughter | — | Minnesota |
| 54 | Leona M. Spernity | 58 | Head | State | Minnesota |
| 55 | Edna Louise Spernity | 22 | Daughter | — | Minnesota |
| 56 | Chester O. Chantz | 57 | Head | Engineer | Kentucky |
| 57 | Helen M. Chantz | 43 | Wife | — | Arkansas |
| 58 | Helen N. Chantz | 18 | Daughter | — | Minnesota |
| 59 | Milton R. Chantz | 16 | Son | — | Minnesota |
| 60 | Thomas E. Chantz | 13 | Son | — | Minnesota |
| 61 | John N. Chantz | 11 | Son | — | Minnesota |
| 62 | Lester H. Chantz | 8 | Son | — | Minnesota |
| 63 | Harry Campbell | 55 | Head | Postal Savings Clerk | Iowa |
| 64 | Florence M. Campbell | 49 | Wife | — | Iowa |
| 65 | Maxine E. Campbell | 21 | Daughter | Clerk | Minnesota |
| 66 | David H. Campbell THIS PERSON | 20 | Son | — | Minnesota |
| 67 | Paul L. Campbell | 18 | Son | Utility Boy | Minnesota |
| 68 | Roger M. Campbell | 8 | Son | — | Minnesota |
| 69 | Carl A. Hansen | 37 | Head | Electrician | Denmark |
| 70 | Wilhelma H. Hansen | 35 | Wife | — | Minnesota |
| 71 | Nancy L. Hansen | 9 | Daughter | — | Minnesota |
| 72 | Dan J. O'Brien | 28 | Head | Clerk | Minnesota |
| 73 | Dorothy M. O'Brien | 24 | Wife | — | Minnesota |
| 74 | Thomas H. O'Brien | 1 | Son | — | Minnesota |
| 75 | Robert H. Gambell | 46 | Head | Nurse | Iowa |
| 76 | Helen L. Gambell | 42 | Wife | — | Minnesota |
| 77 | Helen L. Gambell | 18 | Daughter | — | Minnesota |
| 78 | Eleanor M. Gambell | 16 | Daughter | — | Minnesota |
| 79 | Mamie L. Gambell | 12 | Daughter | — | Minnesota |
| 80 | Robert H. Gambell | 6 | Son | — | Minnesota |
Related Census Records
Pedigree Summary
David + 3 siblings
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)