MP
Mary Pratt — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boone-County, Iowa
Our Model Tree links this Mary Pratt across the 1930 and 1940 US Censuses in Boone-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 6-person household.
Age 17
b. ~1923
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Iowa |
| Surname | Pratt |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Boone City |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Boone City |
| Est. Birth Year | ~1923 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Pratt | Daughter | — | 17 | ~1923 |
| Margaret Pratt | Daughter | — | 22 | ~1918 |
| Helen Pratt | Daughter | — | 12 | ~1928 |
| Robert Pratt | Head | — | 42 | ~1898 |
| James Pratt | Son | — | 14 | ~1926 |
| Bessie Pratt | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Boone, Iowa
Daughter, age 8
Boone, Iowa · implied b. ~1922 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pratt |
| Given Name | Mary |
| 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/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Boone-County, Iowa
Daughter, age 17
Boone-County, Iowa · implied b. ~1923 — 6 household members
| Surname | Pratt |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Boone City |
| 1935 Residence (County) | Boone |
| Highest Grade | H 2 |
| 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 Pratt across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Pratt
Daughter · 1940 · age 17 · b. ~1923 · Iowa
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Sibling
Margaret Pratt
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Pratt
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Pratt
Sibling · 1940 · age 12
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 — Boone-County, Iowa
Open full size
1940 US Federal Census — Boone-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01141-00455)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | D. George | 21 | Son | Laborer | Iowa |
| 2 | Effie Bailey | 64 | Mother in law | — | Iowa |
| 3 | John B. Mathers | 52 | Head | Cutter | Scotland |
| 4 | Mary A. Mathers | 46 | Wife | — | Illinois |
| 5 | Anna J. Mathers | 24 | Daughter | Stenographer | Iowa |
| 6 | Joseph E. Mathers | 22 | Son | Office Clerk | Iowa |
| 7 | John B. Jr. Mathers | 16 | Son | — | Iowa |
| 8 | Robert F. Pratt | 42 | Head | Miner | Iowa |
| 9 | Bessie M. Pratt | 42 | Wife | — | Iowa |
| 10 | Margaret O. Pratt | 22 | Daughter | Secretary | Iowa |
| 11 | Mary E. Pratt THIS PERSON | 17 | Daughter | — | Iowa |
| 12 | James R. Pratt | 14 | Son | — | Iowa |
| 13 | Helen M. Pratt | 12 | Daughter | — | Iowa |
| 14 | Iver Carlson | 71 | Head | Laborer | Sweden |
| 15 | Emily S. Carlson | 62 | Wife | — | Iowa |
| 16 | Marjory F. Carlson | 22 | Daughter | Bookkeeper | Iowa |
| 17 | Elizabeth O. Stanfield | 49 | Sister in law | — | Maryland |
| 18 | Eugene Jackson | 24 | Head | — | Pennsylvania |
| 19 | Elizabeth Jackson | 20 | Wife | — | Missouri |
| 20 | Verna A. Jackson | 34 | Daughter | Housekeeper | Iowa |
| 21 | Alice M. Jackson | 14 | Daughter | — | Iowa |
| 22 | Grover C. Myers | 54 | Head | — | Iowa |
| 23 | Minnie P. Myers | 48 | Wife | Housekeeper | Iowa |
| 24 | Donald C. Myers | 20 | Son | Laborer | Iowa |
| 25 | Helen B. Myers | 18 | Daughter | — | Iowa |
| 26 | Roland F. Myers | 15 | Son | — | Iowa |
| 27 | Beverly J. Myers | 9 | Daughter | — | Iowa |
| 28 | George Pratt | 52 | Head | Fireman | Iowa |
| 29 | Mary Pratt | 44 | Wife | — | Iowa |
| 30 | John W. Hull | 50 | Head | Miner | Iowa |
| 31 | Anna Hull | 50 | Wife | — | Iowa |
| 32 | Roy L. Fenner | 22 | Head | Truck Driver | Iowa |
| 33 | Georgine F. Fenner | 20 | Wife | — | Iowa |
| 34 | Larry L. Fenner | 2 | Son | — | Iowa |
| 35 | Michael E. Tommeen | 59 | Head | Car Repairman | Pennsylvania |
| 36 | Edna B. Tommeen | 55 | Wife | — | Iowa |
| 37 | Donald F. Hickman | 26 | Head | Laborer | Iowa |
| 38 | Fern R. Hickman | 22 | Wife | — | Iowa |
| 39 | Ray William J. Hickman | 0 | Son | — | Iowa |
| 40 | Amy S. Hickman | 60 | Mother | — | Iowa |
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)