MC
Mary Coyle — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Mary Coyle across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1857), then head of a 2-person household.
Age 83
b. ~1857
Female
Head
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Coyle |
| Given Name | Mary R |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 83 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1857 |
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 |
|---|---|---|---|---|
| Hugh Coyle | Son | — | 44 | ~1896 |
| Mary Coyle | Head | — | 83 | ~1857 |
Census Appearances
1920
Polk, Iowa
Head, age 63
Polk, Iowa · implied b. ~1857 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coyle |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Head, age 73
Polk, Iowa · implied b. ~1857 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coyle |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 73 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| Father's Birthplace | Northumberland |
| Mother's Birthplace | Northumberland |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 7 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 83
Polk-County, Iowa · implied b. ~1857 — 2 household members
| Surname | Coyle |
| Given Name | Mary R |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 83 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Highest Grade | No 4 |
| 1935 Residence | Iowa |
| 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 Coyle across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Coyle
Head · 1940 · age 83 · b. ~1857 · Iowa
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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
38 people indexed on this census page (nara:1940:m-t0627-01197-00608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Paul J Porter | 28 | Head | Truck Driver | Iowa |
| 2 | Gloria Jean Porter | 6 | Daughter | — | Iowa |
| 3 | Fred C Porter | 23 | Son | Mailing Dept | Iowa |
| 4 | Martha Porter | 24 | Daughter-in-law | — | Iowa |
| 5 | Sally W Clark | 74 | Head | — | Iowa |
| 6 | Anna Clark | 71 | Wife | — | Iowa |
| 7 | Charles Denney | 53 | Head | Motorman | Missouri |
| 8 | Lida Denney | 60 | Wife | — | Missouri |
| 9 | Mary Denney | 21 | Daughter | Clerical | Kansas |
| 10 | Charles Jr. Denney | 19 | Son | Musician | Iowa |
| 11 | Betty Lou Meyer | 18 | Granddaughter | — | Iowa |
| 12 | Oscar A Stjenquist | 54 | Head | Laborer | Sweden |
| 13 | Mable V Stjenquist | 51 | Wife | Ironer | Nebraska |
| 14 | Alice Stjenquist | 18 | Daughter | Nurse'S Helper | Iowa |
| 15 | Robert Stjenquist | 11 | Son | — | Iowa |
| 16 | Nellie Mcclain | 80 | Mother-in-law | — | Indiana |
| 17 | Gerald Gibson | 30 | Head | Repair Man | Iowa |
| 18 | Wilma Gibson | 28 | Wife | — | Iowa |
| 19 | Betty Ann Gibson | 8 | Daughter | — | Iowa |
| 20 | Jerry Gibson | 3 | Son | — | Iowa |
| 21 | David Pyle | 74 | Head | — | Iowa |
| 22 | Maud V Pyle | 78 | Wife | — | Iowa |
| 23 | Mary R Coyle THIS PERSON | 83 | Head | — | Iowa |
| 24 | Hugh Joseph Coyle | 44 | Son | — | Iowa |
| 25 | Otto Macunshik | 55 | Head | Laborer | Iowa |
| 26 | Lillian Macunshik | 44 | Wife | Janitress | Iowa |
| 27 | Leona Macunshik | 16 | Daughter | — | Minnesota |
| 28 | Stephen Matthews | 78 | Head | — | Wales |
| 29 | Sarah Matthews | 66 | Wife | — | Wales |
| 30 | John Lehions | 54 | Head | Miner | Italy |
| 31 | Kate Lehions | 45 | Wife | — | Italy |
| 32 | Bob Lehions | 24 | Son | Miner | Iowa |
| 33 | Mary Lehions | 21 | Daughter | — | Iowa |
| 34 | John Jr Lehions | 19 | Son | — | Iowa |
| 35 | Thomas P Mackie | 42 | Head | Fireman | England |
| 36 | Esther Mackie | 38 | Wife | — | England |
| 37 | Donald William Mackie | 16 | Son | — | Iowa |
| 38 | Robert Lloyd Mackie | 13 | Son | — | 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)