MS
May Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Iowa
Our Model Tree links this May Smith across the 1930 and 1940 US Censuses in Delaware-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Iowa |
| Surname | Smith |
| Given Name | May I |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Milo Twp |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Milo Twp |
| Est. Birth Year | ~1922 |
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 May | Age | Birth yr |
|---|---|---|---|---|
| Corrine Smith | Daughter | — | 16 | ~1924 |
| Emma Smith | Daughter | — | 9 | ~1931 |
| Ruth Smith | Daughter | — | 6 | ~1934 |
| Betty Smith | Daughter | — | 14 | ~1926 |
| May Smith | Daughter | — | 18 | ~1922 |
| S Smith | Head | — | 46 | ~1894 |
| Carrie Smith | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Delaware, Iowa
Daughter, age 8
Delaware, Iowa · implied b. ~1922 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | May I |
| 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
Delaware-County, Iowa
Daughter, age 18
Delaware-County, Iowa · implied b. ~1922 — 7 household members
| Surname | Smith |
| Given Name | May I |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Milo Twp |
| 1935 Residence (County) | Delaware |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 May Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
May Smith
Daughter · 1940 · age 18 · b. ~1922 · Iowa
★ You are viewing this record
Sibling
Betty Smith
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Corrine Smith
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Smith
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Smith
Sibling · 1940 · age 9
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 — Delaware-County, Iowa
Open full size
1940 US Federal Census — Delaware-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01155-00374)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eldon E Mangold | 8 | Son | — | Iowa |
| 2 | Avis Mangold | 5 | Daughter | — | Iowa |
| 3 | Marilyn Mangold | 3 | Daughter | — | Iowa |
| 4 | Eilt J Huls | 65 | Head | Farming | Germany |
| 5 | Meta Huls | 63 | Wife | — | Germany |
| 6 | Ina Huls | 38 | Daughter | — | Iowa |
| 7 | Wayne W Thompson | 23 | Head | Farming | Iowa |
| 8 | Wilma I Thompson | 23 | Wife | — | Iowa |
| 9 | Thelma L Thompson | 2 | Daughter | — | Iowa |
| 10 | Marilyn J Thompson | 1 | Daughter | — | Iowa |
| 11 | Raymond Fifer | 16 | Hired Hand | Laborer | Iowa |
| 12 | Jack W Mangold | 26 | Head | Farming | Iowa |
| 13 | Berdina M Mangold | 19 | Wife | — | Iowa |
| 14 | Lolita F Mangold | 1 | Daughter | — | Iowa |
| 15 | William Wilson | 75 | Head | Farming | Ireland |
| 16 | Olive Wilson | 67 | Wife | — | Iowa |
| 17 | Edd Hawker | 28 | Hired Hand | Laborer | Iowa |
| 18 | Blanch Hamblin | 35 | Daughter | — | Iowa |
| 19 | Vivian Hamblin | 17 | Daughter | — | Iowa |
| 20 | Allan Hamblin | 15 | Grandson | — | Iowa |
| 21 | Lewis E Diercksen | 51 | Head | Farming | Germany |
| 22 | Lillian Diercksen | 49 | Wife | — | Iowa |
| 23 | Dale Diercksen | 22 | Son | Laborer | Iowa |
| 24 | Velba Diercksen | 17 | Daughter | — | Iowa |
| 25 | Margaret Diercksen | 12 | Daughter | — | Iowa |
| 26 | Victor Diercksen | 4 | Son | — | Iowa |
| 27 | George S Keegan | 56 | Head | Farming | Iowa |
| 28 | Sarah Keegan | 50 | Wife | — | Iowa |
| 29 | Clark C Shaffer | 36 | Brother-in-law | — | Indiana |
| 30 | S. Silas Smith | 46 | Head | Farming | Iowa |
| 31 | Carrie E Smith | 45 | Wife | — | Iowa |
| 32 | May I Smith THIS PERSON | 18 | Daughter | — | Iowa |
| 33 | Corrine E Smith | 16 | Daughter | — | Iowa |
| 34 | Betty N Smith | 14 | Daughter | — | Iowa |
| 35 | Emma Jean Smith | 9 | Daughter | — | Iowa |
| 36 | Ruth D Smith | 6 | Daughter | — | Iowa |
| 37 | Donald W Delancey | 29 | Head | Farming | Iowa |
| 38 | Cilla G Delancey | 29 | Wife | — | Iowa |
| 39 | Sharon L Delancey | 5 | Daughter | — | Iowa |
| 40 | Fredman Walter | 20 | Hired Hand | Laborer | Iowa |
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)