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Robert Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this Robert Larson across the 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Washington Twp. |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Washington Twp |
| Est. Birth Year | ~1929 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Burnhold Larson | Head | — | 43 | ~1897 |
| Mable Larson | Spouse | — | 40 | ~1900 |
| Robert Larson | Son | — | 11 | ~1929 |
| Gronelle Larson | Daughter | — | 15 | ~1925 |
| Joan Larson | Daughter | — | 1 | ~1939 |
| Leona Larson | Daughter | — | 13 | ~1927 |
| Arlene Larson | Daughter | — | 7 | ~1933 |
| Richard Larson | Son | — | 4 | ~1936 |
| Bernard Larson | Son | — | 17 | ~1923 |
Census Appearances
1930
Black Hawk, …
Son, age 1
Black Hawk, Iowa · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Son, age 11
Black-Hawk-County, Iowa · implied b. ~1929 — 9 household members
| Surname | Larson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Washington Twp. |
| 1935 Residence (County) | Black Hawk |
| Highest Grade | 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 Robert Larson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Larson
Son · 1940 · age 11 · b. ~1929 · Iowa
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Sibling
Leona Larson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Larson
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Larson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Larson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gronelle Larson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arlene Larson
Sibling · 1940 · age 7
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
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01139-00742)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George R. Burkett | 71 | Head | — | Iowa |
| 2 | Earl Burkett | 41 | Son | Laborer | Iowa |
| 3 | Melinda Burkett | 36 | Daughter | — | Iowa |
| 4 | Roy Burkett | 13 | Son | — | Iowa |
| 5 | Verne Burkett | 11 | Son | — | Iowa |
| 6 | Dale Burkett | 9 | Son | — | Iowa |
| 7 | Robert Burkett | 7 | Son | — | Iowa |
| 8 | Bette Burkett | 6 | Daughter | — | Iowa |
| 9 | Richard Burkett | 4 | Son | — | Iowa |
| 10 | Ephraim R. Hawe | 49 | Head | Farmer | Iowa |
| 11 | Luella Hawe | 39 | Wife | — | Iowa |
| 12 | Virginia Hawe | 21 | Daughter | — | Iowa |
| 13 | Hubert Hawe | 19 | Son | — | Iowa |
| 14 | Ralph Hawe | 15 | Son | — | Iowa |
| 15 | William Turner | 39 | Head | Machinist | Minnesota |
| 16 | Thelma Turner | 36 | Wife | — | Iowa |
| 17 | William Turner | 15 | Son | — | Minnesota |
| 18 | Arlene Turner | 13 | Daughter | — | Minnesota |
| 19 | Morris Turner | 11 | Son | — | Minnesota |
| 20 | Shirley Turner | 6 | Daughter | — | Minnesota |
| 21 | Wilma Turner | 4 | Daughter | — | Iowa |
| 22 | Thelma Turner | 3 | Daughter | — | Iowa |
| 23 | Patricia Turner | 2 | Daughter | — | Iowa |
| 24 | Beverly Turner | 0 | Daughter | — | Iowa |
| 25 | Verle Turner | 42 | Brother | Laborer | Minnesota |
| 26 | Mark O. Watson | 62 | Head | Farmer | Iowa |
| 27 | Zella Watson | 50 | Wife | — | Iowa |
| 28 | Wendell Watson | 20 | Son | Laborer | Iowa |
| 29 | Lester E. Hart | 56 | Head | Farmer | Iowa |
| 30 | Lydia Hart | 48 | Wife | — | Iowa |
| 31 | Carl Johnson | 37 | Hired Hand | — | Denmark |
| 32 | Burnhold Larson | 43 | Head | Farmer | Iowa |
| 33 | Mable Larson | 40 | Wife | — | Iowa |
| 34 | Bernard Larson | 17 | Son | — | Iowa |
| 35 | Gronelle Larson | 15 | Daughter | — | Iowa |
| 36 | Leona Larson | 13 | Daughter | — | Iowa |
| 37 | Robert Larson THIS PERSON | 11 | Son | — | Iowa |
| 38 | Arlene Larson | 7 | Daughter | — | Iowa |
| 39 | Richard Larson | 4 | Son | — | Iowa |
| 40 | Joan Larson | 1 | Daughter | — | Iowa |
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)