RC
Robert Cooper — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Minnehaha, South Dakota
Our Model Tree links this Robert Cooper across the 1920 and 1930 US Censuses in Minnehaha, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 11-person household.
Age 15
b. ~1915
Male
Son
Born: South Dakota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Minnehaha, South Dakota |
| Surname | Cooper |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Wyoming |
| Mother's Birthplace | South Dakota |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Sioux Falls City |
| Est. Birth Year | ~1915 |
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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Mathresa Cooper | Daughter | — | 3 | ~1927 |
| Ivan Grinnell | Head | — | 30 | ~1900 |
| Alexander Cooper | Other | — | 53 | ~1877 |
| Vincent Cooper | Son | — | 9 | ~1921 |
| Calvin Cooper | Son | — | 21 | ~1909 |
| John Cooper | Son | — | 19 | ~1911 |
| Robert Cooper | Son | — | 15 | ~1915 |
| Albert Cooper | Son | — | 13 | ~1917 |
| Thomas Cooper | Son | — | 6 | ~1924 |
| Mamie Cooper | Spouse | — | 43 | ~1887 |
| Dagmar Grinnell | Spouse | — | 27 | ~1903 |
Census Appearances
1920
Minnehaha, South …
Son, age 5
Minnehaha, South Dakota · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Robert L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Wyoming |
| Mother's Birthplace | South Dakota |
| Speaks English | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
Minnehaha, South …
Son, age 15
Minnehaha, South Dakota · implied b. ~1915 — 11 household members
| Surname | Cooper |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Wyoming |
| Mother's Birthplace | South Dakota |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Cooper across 2 US Census years (1920 and 1930) in Minnehaha, South Dakota, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Cooper
Son · 1930 · age 15 · b. ~1915 · South Dakota
★ You are viewing this record
Sibling
Vincent Cooper
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cooper
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mathresa Cooper
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Calvin Cooper
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Cooper
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cooper
Sibling · 1930 · age 19
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
1930 US Federal Census — Minnehaha, South Dakota
Open full size
1930 US Federal Census — Minnehaha, South Dakota
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2228unit:0305)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith M Irvine | 22 | Wife | Operator | South Dakota |
| 2 | Vinton K Dayton | 34 | Head | Salesman | Minnesota |
| 3 | Agnes E Dayton | 31 | Wife | None | Minnesota |
| 4 | Kirk D Dayton | 5 | Son | None | Minnesota |
| 5 | Melvin C Larson | 23 | Bro-in-law | Salesman | Minnesota |
| 6 | Christian Harvey | 61 | Head | Plumber | Denmark |
| 7 | Mary E Harvey | 52 | Wife | None | Kansas |
| 8 | Clifford E Harvey | 17 | Son | None | South Dakota |
| 9 | Nels C Jensen | 83 | Stepfather | None | Denmark |
| 10 | Lizzie Jensen | 50 | Half sister | None | Denmark |
| 11 | John A Kelly | 54 | Head | Service Worker | Wisconsin |
| 12 | Anna Kelly | 52 | Wife | None | Norway |
| 13 | Clay Howard | 35 | Head | Meter Reader | Iowa |
| 14 | Marie Howard | 31 | Wife | None | Iowa |
| 15 | Irma M Howard | 14 | Daughter | None | Iowa |
| 16 | Irvin C Howard | 12 | Son | None | Iowa |
| 17 | Melvin A Howard | 5 | Son | None | South Dakota |
| 18 | Thomas Van Steenberg | 31 | Head | Salesman | North Dakota |
| 19 | Alice P Van Steenberg | 26 | Wife | None | Minnesota |
| 20 | Ruth Van Steenberg | 2 | Son | None | South Dakota |
| 21 | Lois M Van Steenberg | 0 | Daughter | None | South Dakota |
| 22 | Mary E Van Steenberg | 71 | Mother | None | New York |
| 23 | Carl Lodmell | 26 | Head | Bookkeeper | South Dakota |
| 24 | Mildred M Lodmell | 24 | Wife | None | South Dakota |
| 25 | Mildred A Lodmell | 5 | Daughter | None | South Dakota |
| 26 | Ivan M Grinnell | 30 | Head | Mechanic | South Dakota |
| 27 | Dagmar Grinnell | 27 | Wife | None | South Dakota |
| 28 | Alexander Cooper | 53 | O | Truck Driver | Wyoming |
| 29 | Mamie Cooper | 43 | Wife | None | South Dakota |
| 30 | Calvin A Cooper | 21 | Son | Delivery Boy | Wyoming|Wyoming |
| 31 | John S Cooper | 19 | Son | Truck Driver | Wyoming|Wyoming |
| 32 | Robert E Cooper THIS PERSON | 15 | Son | None | South Dakota |
| 33 | Albert Cooper | 13 | Son | None | South Dakota |
| 34 | Vincent A Cooper | 9 | Son | None | South Dakota |
| 35 | Thomas E Cooper | 6 | Son | None | South Dakota |
| 36 | Mathresa Cooper | 3 | Daughter | None | South Dakota |
| 37 | Clyde S Drage | 29 | Head | Manager | South Dakota |
| 38 | Florence S Drage | 25 | Wife | None | Iowa |
| 39 | Yvonne J Drage | 6 | Daughter | None | South Dakota |
| 40 | Warren C Drage | 1 | Son | None | South Dakota |
| 41 | Milton F Guenther | 23 | Bro-in-law | Waiter | South Dakota |
| 42 | Gilbert H Hillman | 67 | Head | None | Wisconsin |
| 43 | Mary Hillman | 66 | Wife | None | Wisconsin |
| 44 | Walter C Yale | 32 | Head | Barber | Missouri |
| 45 | Wilma S Yale | 29 | Wife | None | Missouri |
| 46 | Betty R Yale | 6 | Daughter | None | South Dakota |
| 47 | Jack B Yale | 4 | Son | None | South Dakota |
| 48 | Charles E Freeman | 37 | Head | Manager | Iowa |
| 49 | Edna Freeman | 36 | Wife | None | South Dakota |
| 50 | Myrtle A Freeman | 7 | Daughter | None | South Dakota |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)