MK
Mary Kelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Kelly across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Ed & Edward — first a daughter (b.~1897), then head of a 2-person household.
Age 43
b. ~1897
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Kelly |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Teacher |
| Industry | Pub School |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 232 |
| Highest Grade | C 3 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Teacher |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1897 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kelly | Daughter | — | 43 | ~1897 |
| Harriet Kelly | Head | — | 71 | ~1869 |
Census Appearances
1920
Polk, Iowa
Daughter, age 24
Polk, Iowa · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wisconsin |
| Occupation | Teacher |
| Industry | High School |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 34
Polk, Iowa · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wisconsin |
| Occupation | Teacher |
| Industry | Grade School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 43
Polk-County, Iowa · implied b. ~1897 — 2 household members
| Surname | Kelly |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Teacher |
| Industry | Pub School |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 232 |
| Highest Grade | C 3 |
| 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 Kelly across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ed Kelly (~0.92 confidence) and father Edward Kelly (~0.92 confidence) and mother Harriet Kelly (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ed Kelly
b. ~1865
Source father
● Household
· direct · ~0.92
Father
Edward Kelly
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Harriet Kelly
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Kelly
Daughter · 1940 · age 43 · b. ~1897 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01193-00722)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Solomon Winnick | 50 | Head | Clo Merch | Russia |
| 2 | Alta Winnick | 44 | Wife | Hskpr | Russia |
| 3 | Marilyn Winnick | 7 | Daughter | — | Iowa |
| 4 | Louise Mcleod | 18 | Maid | Maid | Iowa |
| 5 | Adela Hissler | 55 | Head | Hskpr | Iowa |
| 6 | Lee Jr Hissler | 21 | Son | Stock Boy | Iowa |
| 7 | Marilyn Hissler | 20 | Daughter | Proof Reader | Iowa |
| 8 | Carroll L Hissler | 31 | Son | Executive | Iowa |
| 9 | Jane Hissler | 28 | Daughter-in-law | Hskpr | Iowa |
| 10 | Sharon Lee Hissler | 4 | Granddaughter | — | Iowa |
| 11 | Carolyn Hissler | 1 | Granddaughter | — | Iowa |
| 12 | Lucile Snyder | 30 | Lodger | Hskpr | Missouri |
| 13 | Ray M Warner | 47 | Head | Mgr | Iowa |
| 14 | Ambra Warner | 37 | Wife | Hskpr | Iowa |
| 15 | W Henry Sauer | 17 | Son | — | Iowa |
| 16 | Rosemary Sauer | 12 | Daughter | — | Iowa |
| 17 | Marietta Sauer | 9 | Daughter | — | Iowa |
| 18 | Wm J Mather | 65 | Head | Dental Dr | Iowa |
| 19 | Alta Mae Mather | 65 | Wife | Hskpr | Canada Eng |
| 20 | Paul Hewitt | 49 | Head | Lawyer | Iowa |
| 21 | Charlotte Hewitt | 46 | Wife | Hskpr | Iowa |
| 22 | Paul Jr Hewitt | 20 | Son | — | Iowa |
| 23 | Jean C Hewitt | 19 | Daughter | — | Iowa |
| 24 | Marion Hewitt | 13 | Daughter | — | Iowa |
| 25 | Lester S Thompson | 52 | Head | Salesman | Kansas |
| 26 | Jean Thompson | 52 | Wife | Hskpr | Kansas |
| 27 | John Thompson | 17 | Son | — | Missouri |
| 28 | Margaret Thompson | 12 | Daughter | — | Missouri |
| 29 | Harriet Kelly | 71 | Head | Hskpr | Wisconsin |
| 30 | Mary L Kelly THIS PERSON | 43 | Daughter | Teacher | Iowa |
| 31 | Russell Petrus | 53 | Head | Attorney | Iowa |
| 32 | Frances Petrus | 42 | Wife | Hskpr | Conn |
| 33 | Joan Petrus | 15 | Daughter | — | Iowa |
| 34 | Edward Haley | 34 | Head | Executive | Iowa |
| 35 | Lucile Haley | 32 | Wife | Hskpr | Iowa |
| 36 | Mary P Haley | 6 | Daughter | — | Iowa |
| 37 | Judith Ann Haley | 2 | Daughter | — | Iowa |
| 38 | Eilene R Haley | 0 | Daughter | — | Iowa |
| 39 | Ruth Strandberg | 20 | Maid | Maid | Iowa |
| 40 | Virginia Hood | 21 | Daughter | Hskpr | Iowa |
Pedigree Summary
Mary
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)