MC
Mary Collins — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sioux-County, Iowa
Our Model Tree links this Mary Collins across the 1930 and 1940 US Censuses in Sioux-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sioux-County, Iowa |
| Surname | Collins |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ireton |
| 1935 Residence (County) | Sioux |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Ireton |
| Est. Birth Year | ~1928 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Collins | Daughter | — | 12 | ~1928 |
| Bonnie Collins | Daughter | — | 13 | ~1927 |
| Carole Collins | Daughter | — | 2 | ~1938 |
| Kaye Collins | Daughter | — | 2 | ~1938 |
| Early Collins | Head | — | 53 | ~1887 |
| Leon Collins | Son | — | 11 | ~1929 |
| Bruce Collins | Son | — | 6 | ~1934 |
| Conrad Collins | Son | — | 7 | ~1933 |
| Ben Collins | Son | — | 15 | ~1925 |
| Emma Collins | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Sioux, Iowa
Daughter, age 2
Sioux, Iowa · implied b. ~1928 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Collins |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | No |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Sioux-County, Iowa
Daughter, age 12
Sioux-County, Iowa · implied b. ~1928 — 10 household members
| Surname | Collins |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ireton |
| 1935 Residence (County) | Sioux |
| Highest Grade | No 7 |
| 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 Mary Collins across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Collins
Daughter · 1940 · age 12 · b. ~1928 · Iowa
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Sibling
Carole Collins
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kaye Collins
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ben Collins
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bruce Collins
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leon Collins
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Conrad Collins
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bonnie Collins
Sibling · 1940 · age 13
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 — Sioux-County, Iowa
Open full size
1940 US Federal Census — Sioux-County, Iowa
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-01205-00527)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Wm Thrielman | 63 | Head | Farm | Germany |
| 42 | Martha Thrielman | 59 | Wife | — | Ills |
| 43 | Evertt Wendt | 15 | Student | — | S Dak |
| 44 | Giles Vreulul|Vreulul | 64 | Head | Farm | Netherlands |
| 45 | Fannie Vreulul|Vreulul | 67 | Wife | — | Netherlands |
| 46 | Christina M. Vreulul|Vreulul | 17 | Daughter | — | Iowa |
| 47 | Mrs. L. C. Meyer | 61 | Head | — | Germany |
| 48 | Ralph Vander Schaaf | 39 | Head | Day | Iowa |
| 49 | Nellie Vander Schaaf | 37 | Wife | — | Iowa |
| 50 | Carolyn Vander Schaaf | 18 | Daughter | — | Iowa |
| 51 | Dolores Vander Schaaf | 14 | Daughter | — | Iowa |
| 52 | Ronald Vander Schaaf | 11 | Son | — | Iowa |
| 53 | M. T. Olivier | 76 | Father | — | Netherlands |
| 54 | Marlin Eilts | 23 | Head | Farm | Iowa |
| 55 | Fern Eilts | 24 | Wife | — | Iowa |
| 56 | John Jr. Vlotho | 49 | Head | No | Iowa |
| 57 | Hattie Vlotho | 48 | Wife | — | Iowa |
| 58 | Lorene Vlotho | 22 | Daughter | — | Iowa |
| 59 | Cleone Vlotho | 15 | Daughter | — | Iowa |
| 60 | Early Lean | 80 | Head | — | Wisconsin |
| 61 | Early Collins | 53 | Head | — | Iowa |
| 62 | Emma Collins | 39 | Wife | — | Iowa |
| 63 | Ben Collins | 15 | Son | — | Iowa |
| 64 | Bonnie Collins | 13 | Daughter | — | Iowa |
| 65 | Mary Collins THIS PERSON | 12 | Daughter | — | Iowa |
| 66 | Leon Collins | 11 | Son | — | Iowa |
| 67 | Conrad Collins | 7 | Son | — | Iowa |
| 68 | Bruce Collins | 6 | Son | — | Iowa |
| 69 | Carole Collins | 2 | Daughter | — | Iowa |
| 70 | Kaye Collins | 2 | Daughter | — | Iowa |
| 71 | H. W. Krieger | 54 | Head | Minister | Iowa |
| 72 | Hattie Krieger | 50 | Wife | — | Germany |
| 73 | Lois Krieger | 21 | Daughter | Teacher | Minn. |
| 74 | Robert Krieger | 14 | Son | — | Minn. |
| 75 | Herbert Krieger | 12 | Son | — | Minn. |
| 76 | Helen Krieger | 7 | Daughter | — | Minn. |
| 77 | Mrs. E. Lipke | 79 | Mother in law | — | Germany |
Related Census Records
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)