MR
Mary Reardon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Minnehaha-County, South Dakota
Our Model Tree links this Mary Reardon across the 1930 and 1940 US Censuses in Minnehaha-County, South Dakota (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Female
Daughter
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Minnehaha-County, South Dakota |
| Surname | Reardon |
| Given Name | Mary Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Sioux Falls City |
| 1935 Residence (County) | Minnehaha |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same House |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Sioux Falls City |
| Est. Birth Year | ~1924 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Abbie Reardon | Spouse | — | 58 | ~1882 |
| Thomas Reardon | Son | — | 26 | ~1914 |
| Mary Reardon | Daughter | — | 16 | ~1924 |
| John Reardon | Son | — | 18 | ~1922 |
| Scott Reardon | Son | — | 24 | ~1916 |
| Ann Reardon | Daughter | — | 24 | ~1916 |
| Bernard Reardon | Head | — | 68 | ~1872 |
Census Appearances
1930
Minnehaha, South …
Daughter, age 6
Minnehaha, South Dakota · implied b. ~1924 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reardon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Nebraska |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Minnehaha-County, South …
Daughter, age 16
Minnehaha-County, South Dakota · implied b. ~1924 — 7 household members
| Surname | Reardon |
| Given Name | Mary Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Sioux Falls City |
| 1935 Residence (County) | Minnehaha |
| Income (1939) | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same House |
| 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 Mary Reardon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Reardon
Daughter · 1940 · age 16 · b. ~1924 · South Dakota
★ You are viewing this record
Sibling
John Reardon
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Reardon
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Reardon
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Scott Reardon
Sibling · 1940 · age 24
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 — Minnehaha-County, South Dakota
Open full size
1940 US Federal Census — Minnehaha-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03863-00445)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Albert Larson | 62 | Head | Owner Hardware | South Dakota |
| 2 | Nellie Larson | 51 | Wife | — | South Dakota |
| 3 | William Larson | 20 | Son | — | South Dakota |
| 4 | Arthur Ziegler | 38 | Brother-in-law | Salesman | South Dakota |
| 5 | Rhea Muehl | 36 | Servant | Servant | Nebraska |
| 6 | Robert O'Brien | 50 | Head | Cashier | Illinois |
| 7 | Evelyn O'Brien | 48 | Wife | — | Iowa |
| 8 | John W. Poole | 55 | Head | Traveling Auditor | Canada English |
| 9 | Anna D. Poole | 55 | Wife | — | South Dakota |
| 10 | William Martin | 50 | Head | Dept Manager | Iowa |
| 11 | Thelma Martin | 40 | Wife | — | Illinois |
| 12 | Dorothy Martin | 20 | Daughter | — | Iowa |
| 13 | Ray W. Clark | 25 | Head | Auditor | Iowa |
| 14 | June Clark | 22 | Wife | — | Iowa |
| 15 | Michael Clark | 2 | Son | — | South Dakota |
| 16 | Anna Mannix | 52 | Head | — | Iowa |
| 17 | Althea Sales | 23 | Lodger | Clerk | Iowa |
| 18 | Arthur Jacobson | 41 | Lodger | Metal Worker | South Dakota |
| 19 | Lillian Huxtable | 41 | Lodger | — | Nebraska |
| 20 | Marian Abdallah | 33 | Lodger | Clerk | Nebraska |
| 21 | Frank Olson | 51 | Head | Lumber Dealer | Iowa |
| 22 | Margaret Olson | 51 | Wife | — | Iowa |
| 23 | Frances Olson | 22 | Son | Yard Foreman | Minnesota |
| 24 | James Olson | 20 | Son | Bookkeeper | Minnesota |
| 25 | Margaret Olson | 18 | Daughter | Assit Bookkeeper | Minnesota |
| 26 | Alice Olson | 8 | Daughter | — | Iowa |
| 27 | Bernard Reardon | 68 | Head | Owner Wholesale Hardware | Illinois |
| 28 | Abbie Reardon | 58 | Wife | — | Nebraska |
| 29 | Thomas Reardon | 26 | Son | Traveling Salesman | South Dakota |
| 30 | Scott Reardon | 24 | Son | Traveling Salesman | South Dakota |
| 31 | Ann Reardon | 24 | Daughter | Stenographer | South Dakota |
| 32 | John Reardon | 18 | Son | Handy Man | South Dakota |
| 33 | Mary Margaret Reardon THIS PERSON | 16 | Daughter | — | South Dakota |
| 34 | W. George Storen | 50 | Head | Assit Deputy Warden | Minnesota |
| 35 | Freda Storen | 40 | Wife | — | Iowa |
| 36 | Margaret Storen | 22 | Daughter | Stenographer | South Dakota |
| 37 | Catherine Storen | 20 | Daughter | Book Keeper | Minnesota |
| 38 | Alice Mae Storen | 17 | Daughter | — | Minnesota |
| 39 | Wanda Storen | 15 | Daughter | — | South Dakota |
| 40 | Lois Storen | 13 | Daughter | — | South Dakota |
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)