MO
Mary Orr — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Delaware, Iowa
Our Model Tree links this Mary Orr across the 1920 and 1930 US Censuses in Delaware, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 11-person household.
Age 19
b. ~1911
Female
Daughter
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Delaware, Iowa |
| Surname | Orr |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Milo Township |
| Est. Birth Year | ~1911 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Orr | Son | — | 12 | ~1918 |
| Lloyd Orr | Son | — | 7 | ~1923 |
| Paul Orr | Son | — | 16 | ~1914 |
| Arlene Orr | Daughter | — | 4 | ~1926 |
| Kathryn Orr | Daughter | — | 14 | ~1916 |
| Lavonda Orr | Daughter | — | 2 | ~1928 |
| Elmer Grapes | Other | — | 29 | ~1901 |
| Dorothy Orr | Daughter | — | 10 | ~1920 |
| Mary Orr | Daughter | — | 19 | ~1911 |
| Louise Orr | Spouse | — | 39 | ~1891 |
| Charles Orr | Head | — | 43 | ~1887 |
Census Appearances
1920
Delaware, Iowa
Daughter, age 8
Delaware, Iowa · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Orr |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Delaware, Iowa
Daughter, age 19
Delaware, Iowa · implied b. ~1911 — 11 household members
| Surname | Orr |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| 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 Orr across 2 US Census years (1920 and 1930) in Delaware, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Orr
Daughter · 1930 · age 19 · b. ~1911 · Iowa
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Sibling
Arlene Orr
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Orr
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lavonda Orr
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lloyd Orr
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Orr
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Orr
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Orr
Sibling · 1930 · age 10
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 — Delaware, Iowa
Open full size
1930 US Federal Census — Delaware, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel652:0607)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bolt J Heuls | 55 | Head | Farmer | Germany |
| 2 | Meta Heuls | 54 | Wife | — | Germany |
| 3 | Lena J Heuls | 28 | Daughter | — | Iowa |
| 4 | Minnie G Heuls | 24 | Daughter | Teacher | Iowa |
| 5 | Adella V Heuls | 21 | Daughter | Teacher | Iowa |
| 6 | Harry W Baker | 56 | Head | Farmer | Iowa |
| 7 | Verna Baker | 41 | Wife | Treasurer | Iowa |
| 8 | Leola M Baker | 15 | Daughter | — | Iowa |
| 9 | Harriet I Baker | 14 | Daughter | — | Iowa |
| 10 | Lynn W Baker | 7 | Son | — | Iowa |
| 11 | Harry V Baker | 6 | Son | — | Iowa |
| 12 | Albert Galetzki | 56 | Head | Farmer | Germany |
| 13 | Emma Galetzki | 47 | Wife | — | Iowa |
| 14 | Arlene Galetzki | 15 | Daughter | — | Iowa |
| 15 | Minnie Evert | 84 | Mother-in-law | — | Germany |
| 16 | Arthur Sheppard | 37 | Head | Farmer | Ohio |
| 17 | Isaac Sheppard | 67 | Brother | Farm-Laborer | Ohio |
| 18 | Maude B H Sheppard | 65 | Sister-in-law | — | Iowa |
| 19 | Bernard G Cooking | 29 | Head | Farmer | Iowa |
| 20 | Laura P Cooking | 27 | Wife | — | Illinois |
| 21 | Jean I Cooking | 5 | Daughter | — | Iowa |
| 22 | Roy L Atkinson | 44 | Head | Farmer | Iowa |
| 23 | Agnes M Atkinson | 45 | Wife | — | New York |
| 24 | Florence A B Atkinson | 17 | Daughter | — | Iowa |
| 25 | Francis J Atkinson | 14 | Son | — | Iowa |
| 26 | Mabel A Atkinson | 12 | Daughter | — | Iowa |
| 27 | Donald C Atkinson | 10 | Son | — | Iowa |
| 28 | Roy Atkinson | 4 | Son | — | Iowa |
| 29 | Lois K Atkinson | 2 | Daughter | — | Iowa |
| 30 | Martin Shaw | 69 | Hired man | Farm-Laborer | Iowa |
| 31 | Fred C Timmerman | 58 | Head | Farmer | Iowa |
| 32 | Nettie B Timmerman | 55 | Wife | — | Illinois |
| 33 | Grant J Ernest | 10 | Hired son | — | Iowa |
| 34 | Doran D Delancey | 29 | Head | Farmer | Iowa |
| 35 | Hazel M Delancey | 21 | Wife | — | Illinois |
| 36 | David D Delancey | 2 | Son | — | Iowa |
| 37 | Ruth I Delancey | 1 | Daughter | — | Iowa |
| 38 | Charles J Orr | 43 | Head | Farmer | Iowa |
| 39 | Louise B Orr | 39 | Wife | — | Iowa |
| 40 | Mary E Orr THIS PERSON | 19 | Daughter | — | Iowa |
| 41 | Paul C Orr | 16 | Son | — | Iowa |
| 42 | Kathryn L Orr | 14 | Daughter | — | Iowa |
| 43 | Charles J Orr | 12 | Son | — | Iowa |
| 44 | Dorothy M Orr | 10 | Daughter | — | Iowa |
| 45 | Lloyd A Orr | 7 | Son | — | Iowa |
| 46 | Arlene M Orr | 4 | Daughter | — | Iowa |
| 47 | Lavonda L Orr | 2 | Daughter | — | Iowa |
| 48 | Elmer Grapes | 29 | Hired man | Farm-Laborer | Iowa |
| 49 | Earl M Weldon | 36 | Head | Farmer | Iowa |
| 50 | Olive E Weldon | 28 | Wife | — | Iowa |
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)