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James Robbins — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lee-County, Iowa
Our Model Tree links this James Robbins across the 1930 and 1940 US Censuses in Lee-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 10-person household.
Age 13
b. ~1927
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lee-County, Iowa |
| Surname | Robbins |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Lee |
| Additional Details | |
| Highest Grade | Hs 5 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Fort Madison |
| Est. Birth Year | ~1927 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mamie Robbins | Spouse | — | 32 | ~1908 |
| Joseph Robbins | Son | — | 4 | ~1936 |
| Richard Robbins | Son | — | 7 | ~1933 |
| Harold Robbins | Son | — | 10 | ~1930 |
| Gary Robbins | Son | — | 1 | ~1939 |
| David Robbins | Son | — | 15 | ~1925 |
| Donald Robbins | Son | — | 12 | ~1928 |
| Chester Robbins | Head | — | 40 | ~1900 |
| James Robbins | Son | — | 13 | ~1927 |
| Robert Robbins | Son | — | 1 | ~1939 |
Census Appearances
1930
Lee, Iowa
Son, age 2
Lee, Iowa · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robbins |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Lee-County, Iowa
Son, age 13
Lee-County, Iowa · implied b. ~1927 — 10 household members
| Surname | Robbins |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Lee |
| Highest Grade | Hs 5 |
| 1935 Residence | Iowa |
| 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 James Robbins across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Robbins
Son · 1940 · age 13 · b. ~1927 · Iowa
★ You are viewing this record
Sibling
David Robbins
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Robbins
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Robbins
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Robbins
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gary Robbins
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Robbins
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Robbins
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 — Lee-County, Iowa
Open full size
1940 US Federal Census — Lee-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01174-00932)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Victor Vasquez | 12 | Son | — | Iowa |
| 42 | Isais Vasquez | 11 | Son | — | Iowa |
| 43 | Marian Vasquez | 8 | Daughter | — | Iowa |
| 44 | Lupe Vasquez | 5 | Son | — | Iowa |
| 45 | Leonard Vasquez | 4 | Son | — | Iowa |
| 46 | John Vasquez | 1 | Son | — | Iowa |
| 47 | Chester Robbins | 40 | Head | Farm Hand | Iowa |
| 48 | Mamie Robbins | 32 | Wife | — | Kentucky |
| 49 | David Robbins | 15 | Son | Farm Hand | Iowa |
| 50 | James Robbins THIS PERSON | 13 | Son | — | Iowa |
| 51 | Donald Robbins | 12 | Son | — | Iowa |
| 52 | Harold Robbins | 10 | Son | — | Iowa |
| 53 | Richard Robbins | 7 | Son | — | Iowa |
| 54 | Joseph Robbins | 4 | Son | — | Iowa |
| 55 | Gary Robbins | 1 | Son | — | Iowa |
| 56 | Robert Robbins | 1 | Son | — | Iowa |
| 57 | Platton Orozco | 68 | Head | Janitor | Mexico |
| 58 | Alice Orozco | 63 | Wife | — | Iowa |
| 59 | John Robert Orozco | 27 | Son | Boiler | Iowa |
| 60 | Robert Orozco | 22 | Son | Laborer | Iowa |
| 61 | Catherine Orozco | 21 | Daughter-in-law | — | Iowa |
| 62 | Robert Lee Orozco | 2 | Grandson | — | Iowa |
| 63 | William Ridgley | 41 | Head | Machine Operator | Missouri |
| 64 | Marjorie Ridgley | 25 | Wife | — | Iowa |
| 65 | William Denning | 40 | Head | Machine Operator | Iowa |
| 66 | Mabel Denning | 34 | Wife | — | Missouri |
| 67 | George W. Denning | 12 | Son | — | Iowa |
| 68 | Herbert Ridgley | 31 | Head | Operator Helper | Missouri |
| 69 | Marcella Ridgley | 21 | Wife | — | Iowa |
| 70 | Harry Anthony Baxter | 20 | Brother-in-law | Sausage Maker | Iowa |
| 71 | Walter Leo Eid | 38 | Head | Painter Paper Hanger | Illinois |
| 72 | Bertha Eid | 31 | Wife | — | Iowa |
| 73 | Winifred Eid | 10 | Daughter | — | Illinois |
| 74 | Leola Eid | 8 | Daughter | — | Iowa |
| 75 | Ervin Eid | 6 | Son | — | Iowa |
| 76 | John Eid | 4 | Son | — | Iowa |
| 77 | William Eid | 2 | Son | — | Iowa |
| 78 | Norene Eid | 0 | Daughter | — | Iowa |
| 79 | Joseph P. Smutzer | 31 | Head | Drilling | Iowa |
| 80 | Geraldine Smutzer | 27 | Wife | — | Illinois |
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)